Publications – International Journal

(Roughly in reverse chronological order)

[112] [2018.1] J. -W. Shin, H. Cho, J. Lee, J. Moon, J. -H. Han, K. Kim, S. Cho, J. -I. Lee, B. -H. Kwon, D. -H. Cho, K. M. Lee, M. Suemitsu, and N. S. Cho*, “Overcoming the efficiency limit of organic light-emitting diodes using ultra-thin and transparent graphene electrode”, Optics Express, 26 617-626 (2018)

[111] [2017.10] H. Lee, M. -J. Maeng, J. -A. Hong, R. Najnin, J. Moon, H. Cho, J. Lee, B. -G. Yu, Y. Park*, and N. S. Cho*, “Highly efficient green, blue, and white phosphorescent inverted organic light-emitting diodes by improving charge injection and balance”, J. Mater. Chem. C., 5, 9911-9919 (2017)

[110] [2017.8] D. -H. Cho*, O. E. Kwon, Y. -S. Park, B. G. Yu, J. Lee, J. Moon, H. Cho, H. Lee, and N. S. Cho, “Flexible integrated OLED substrates prepared by printing and plating process”, Org. Electron., 50, 170-176 (2017)

[109] [2017.7] B. S. You, C. W. Joo, H. J. Ha, B. Y. Hwang, B. H. Kang, J. -I. Lee, J. Lee*, and B. K. Ju*, “Micro/Nano-Stripe Organic Light Emitting Diodes fabricated using Photolithography and Laser Interference Lithography” Nanoscience and Nanotechnology Letters, 9, 1028 (2017)

[108] [2017.4] H. Cho, E. Kim, J. Moon, C. W. Joo, E. Ki, S. K, Park, J. Lee, B. -G. Yu, J. -I. Lee, S. Yoo, and N. S. Cho*, “Organic wrinkles embedded in high-index medium as planar incoherent internal scattering structures for organic light-emitting diodes”, Org. Electron., 46, 139-144 (2017)

[107] [2017.4] H. Cho, H. Lee, J. Lee, W. J. Sung, B. -H. Kwon, C. W. Joo, J. -W. Shin, J. -H. Han, J. Moon, J. -I. Lee, S. Cho, and N. S. Cho*, “Stable angular emission spectra in white organic light-emitting diodes using graphene/PEDOT:PSS composite electrode”, Optics Express, 25, 9734-9742 (2017)

[106] [2017.3] C. W. Joo, K. Lee, J. Lee, H. Cho, J. -W. Shin, N. S. Cho, and J. Moon*, “Optical and structural approaches for improved luminance distribution and enhanced efficiency of organic light emitting diodes”, J. Luminescence, 187, 433-440 (2017)

[105] [2017.3] Y. K. Seo^†, C. W. Joo^†, J. Lee^†, J. W. Han, D. J. Lee, S. A. N. Entifar, S. Kim, N. S. Cho, and Y. H. Kim*, “Post-treated PEDOT:PSS doped with 2-ethoxyethanol films as transparent electrodes for ITO-free organic light-emitting diodes”, J. Luminescence, 187, 221-226 (2017) (^†equally contributed)

[104] [2017.1] Y. -S. Park, K. -H. Han, J. Kim, D. -H. Cho, J. Lee, Y. Han, J. T. Lim, N. S. Cho, B. Yu, J. -I. Lee, and J. -J. Kim, “Crystallization-assisted nano lens array fabrication for highly efficient and color stable organic light emitting diodes”, Nanoscale, 9, 230-236 (2017)

[103] [2017.1] Y. K. Seo^†, C. W. Joo^†, J. Lee^†, N. S. Cho, J. H. Kim, J. Y. Oh, K. T. Lim, S. Yu, M. H. Kang, C. Yun, B. H. Choi, and Y. H. Kim*,  “Efficient ITO-free organic light-emitting diodes comprising PEDOT:PSS transparent electrodes optimized with 2-ethoxyethanol and post treatment”, Org. Electron. 42, 348-354 (2017) (^†equally contributed)

[102] [2017.1] J. Y. Oh, J. H. Ki, Y. K. Seo, C. W. Joo, J. Lee, J. -I. Lee, S. Yu, C. Yun, M. H. Kang, B. H. Choi, and Y. H. Kim*,  “Down-conversion light outcoupling films using imprinted microlens arrays for white organic light-emitting diodes”, Dyes and Pigments, 136, 92, (2017)

[101] [2017.1] H. S. Kim, C. W. Joo, B. Pyo, J. Lee, and M. C. Suh*, “Improvement of viewing angle dependence of the white organic light emitting diodes with tandem structure by introduction of nanoporous polymer films” Org. Electron., 40, 88-96 (2017)

[100] [2016.11] J. T. Lim, J. T. Ahn, J. Lee, J. Moon, S. M. Cho, C. S. Ah, S. C. Lim, and J. -I. Lee, “Reflective Colored Organic Light-emitting Diodes for Light-adaptable Display”, Journal of Nanoscience and Nanotechnology, 16, 11843-11848 (2016)

[99] [2016.10] H. Cho, C. W. Joo, J. Lee, H. Lee, J. Moon, J. -I. Lee, J. Y. Lee, Y. Kang, and N. S. Cho*, “Design and fabrication of two-stack tandem-type all-phosphorescent white organic light-emitting diode for achieving high color rendering index and luminous efficacy”, Optics Express, 24, 24161-24168 (2016)

[98] [2016.9] J. Y. Kim*, J. -Y. Oh, S. Cheon, H. Lee, J. Lee, J. -I. Lee, H. Ryu, S. M. Cho, T. -Y. Kim, C. -S. Ah, Y. -H. Kim, and C. -S. Hwang, “Optimized Ion Diffusion Depth for Maximizing Optical Contrast of Environmentally Friendly PEDOT:PSS Electrochromic Device”, Optical Materials Express, 6, 3127-3134 (2016)

[97] [2016.7] J. H. Kim^†, C. W. Joo^†, J. Lee^†, Y. K. Seo, J. W. Han, J. Y. Oh, S. Yu, J. S. Kim, J. -I. Lee, and Y. H. Kim*,  “Highly conductive PEDOT:PSS films with 1,3-dimethyl-2-imidazolidinone as transparent electrodes for organic light-emitting diodes”, Macromolecular Rapid Comm.,  37, 1427 (2016) (^†equally contributed)

[96] [2016.7] K. Lee, J. -W. Shin, J. -H. Park, J. Lee, C. W. Joo, J. -I. Lee, D. -H. Cho, J. T. Lim, M. -C. Oh, B. -K. Ju*, and J. Moon*, “A light scattering layer for internal light extraction of organic light-emitting diodes on silver nanowires”, ACS Applied Materials & Interfaces, 8, 17409-17415 (2016)

[95] [2016.6] H. Cho, J. Lee, J. -I. Lee J. H. Park, Y. Kang*, J. Y. Lee*, and N. S. Cho*, “Phenylimidazole-based homoleptic iridium(III) compounds for blue phosphorescent organic light-emitting diodes with high efficiency and long lifetime”, Org. Electron., 34, 91-96 (2016)

[94] [2016.5] S. B. Lee, K. H. Park, C. W. Joo, J. -I. Lee, J. Lee*, and Y. H. Kim*, “Highly twisted pyrene derivatives for non-doped blue OLEDs” Dyes and Pigments, 128, 19-25 (2016)

[93] [2016.4] B. Pyo, C. W. Joo, H. S. Kim, B. -H. Kwon, J. -I. Lee, J. Lee, and M. C. Suh, “A nanoporous polymer film as a diffuser as well as a light extraction component for top emitting organic light emitting diode with strong microcavity structure” Nanoscale, 8, 8575-8582 (2016)

[92] [2016.4] J. Lee, W. J. Sung, C. W. Joo, H. Cho, N. Cho, G. -W. Lee, D. H. Hwang, and J. -I. Lee, “Simplified Bilayer White Phosphorescent Organic Light-Emitting Diodes” ETRI J., 38, 260-264 (2016)

[91] [2016.3] B. -K. Kang, H. Cho, J. -H. Han, J. -W. Shin, J. Song, S. K. Park, J. Lee, C. W. Joo, E. Kim, S. Yoo, J. -I. Lee, B. -K. Ju, and J. Moon*, “Area-selective external light extraction for metal bus equipped large area transparent organic light-emitting diodes”, Optics Express, 24, 5356-5365 (2016)

[90] [2016.1] C. W. Joo, J. -W. Shin, J. Moon, J. W. Huh, D. -H. Cho, J. Lee, S. K. Park, N. S. Cho, J. -H. Han, H. Y. Chu, and J. -I. Lee*, “Highly efficient transparent white organic light emitting diodes with nano-structured substrate for light extraction” Organic Electronics, 29, 72-78 (2016)

[89] [2016.1] K. Lee,  J. Lee, E. Kim, J. -I. Lee, D. -H. Cho, J. T. Lim, C. W. Joo, J. Y. Kim, S. Yoo, B. -K. Ju*, and J. Moon*, “A lateral polymer phase separation system and its application to organic light emitting diode”, Nanotechnology, 27, 075202 (2016)

[88] [2016.1] J. W. Shin, J. Moon, D. -H. Cho, C. W. Joo, S. K. Park, J. Lee, J. -H. Han, N. S. Cho, H. Cho, and J. -I. Lee*, “White Organic Light Emitting Diodes with a Random Scattering Layer for an Internal Light Extraction” ECS JSST., 5, R3126-R3130 (2016)

[87] [2015.12] J. -H. Lee, and J. Lee*, “Efficient Green Phosphorescent OLEDs with Hexaazatrinaphthylene Derivatives as a Hole Injection Layer” Appl. Chem. Eng., 26, 725-729 (2015)

[86] [2015.11] J. Lee*, T. -W. Koh, H. Cho, S. Hofmann, S. Reineke, J. -H. Lee, J. -I. Lee, S. Yoo, K. Leo, and M. C. Gather, “Color temperature tuning of white organic light-emitting diodes via spatial control of micro-cavity effects based on thin metal strips” Organic Electronics, 26, 334-339 (2015)

[85] [2015.10] J. Chung, H. Cho, T. -W. Koh, J. Lee, E. Kim, J. Lee, J. -I. Lee, and S. Yoo*, “Towards highly efficient and highly transparent OLEDs: advanced considerations for emission zone coupled with capping layer design”, Optics Express , 23, 27306-27314 (2015)

[84] [2015.10] C. W. Joo, J. Moon*, J. -H. Han, J. W. Huh, D. -H. Cho, J. Lee, N. S. Cho, and J. -I. Lee, “White transparent organic light emitting diodes with high top and bottom color rendering indices” J. Inf. Disp., 16, 161-169 (2015)

[83] [2015.8] J. Moon*, E. Kim, S. K. Park, K. Lee, J. -W. Shin, D. -H. Cho, J. Lee, N. S. Cho, J. H. Han, B. -G. Yu, S. Yoo, and J. -I. Lee, “Organic wrinkles for energy efficient organic light emitting diodes” Organic Electronics, 26, 273 (2015)

[82] [2015.6] J. Lee*, T. -W. Koh, H. Cho, T. Schwab, J. -H. Lee, S. Hofmann, J. -I. Lee, S. Yoo, K. Leo, and M. C. Gather, “Transparent organic light-emitting diodes with different bi-directional emission colors using color-conversion capping layers” J. Luminescence, 162, 180-184 (2015)

[81] [2015.5] E. Kim, H. Cho, K. Kim, T. -W. Koh, J. Chung, J. Lee, Y. K. Park, S. Yoo, “A Facile Route to Effi cient, Low-Cost Flexible Organic Light-Emitting Diodes: Utilizing the High Refractive Index and Built-In Scattering Properties of Industrial-Grade PEN Substrates”, Adv. Mater. 27, 1624-1631 (2015)

[80] [2015.1] S. -H. Hahn,  J. Lee, H. Y. Chu, J. -I. Lee, Y. J. Lee, J. Hwang, S. C. Shin*, and Y. -H. Kim “New Blue Emitting Material with Asymmetric Limb Structure”, J. Nanosci. Nanotechnol., 15, 355-359 (2014)

[79] [2015.1] C. W. Joo, J. Lee, W. J. Sung, J. Moon, N. S. Cho, H. Y. Chu, and J. -I. Lee* “ITO/metal/ITO anode for efficient transparent white organic light-emitting diodes”, Jpn.J.Appl.Phys., 54, 02BC04 (2015)

[78] [2015.1] J. Y. Kim*, C. W. Joo, J. Lee, N. S. Baek, J. -Y. Oh, H. Y. Chu, and J. -I. Lee* “Save Energy on OLED lighting by simple yet powerful technique”, RSC Adv. 5, 8415-8421 (2015)

[77] [2014.11] R. Kim, X. Liu, S. -G. Lee, J. Lee*, and Y. -H. Kim “New limb-structured blue light-emitting material comprising an anthracene core with bulky substituents at its 2, 3, 9, and 10-positions”, Syn. Metals., 197, 68-74(2014)

[76] [2014.10] D. -H. Cho*, J. -W. Shin, J. Moon, S. K. Park, C. W. Joo, N. S. Cho, J. W. Huh, J. -H. Han, J. Lee, H. Y. Chu, and J. -I. Lee “Surface control of planarization layer on embossed glass for light extraction in OLED”, ETRI J. , 39, 847-855 (2014)

[75] [2014.9] W. J. Sung, J. Lee*, C. W. Joo, N. S. Cho, H. Lee, G. -W. Lee*, and J. -I. Lee “Colored semi-transparent organic light-emitting diodes”, J. Inf. Disp. , 15,177-184 (2014)

[74] [2014.8] K. Lee, J. Lee, J. Y. Kim, C. W. Joo, D. -H. Cho, J. -I. Lee, H. Y. Chu, J. Moon, and B. -K. Ju*, “Organic light emitting diode with uniform luminance distribution and enhanced efficiency via random embossing structure”, ECS Solid State Letters ,3, R56-R59 (2014)

[73] [2014.9] D. -H. Cho*, J. -W. Shin, C. W. Joo, J. Lee, S. K. Park, J. Moon, N. S. Cho, J. Joo, H. Y. Chu, and J. -I. Lee “Light diffusing effects of nano and micro-structures on OLED with microcavity”, , Optics Express, 22, A1507 (2014)

[72] [2014.8] J. W. Huh, J. -W. Shin, D. -H. Cho, J. Moon, C. W. Joo, S. K. Park, J. Hwang, N. S. Cho, J. Lee, J. -H. Han, H. Y. Chu, and J. -I. Lee* “Randomly nano-structured scattering layer as an internal light-extracting layer for transparent organic light emitting diodes”, Nanoscale 6, 10727-10733 (2014)

[71] [2014.6] J. -W. Shin, D. -H. Cho, J. Moon, C. W. Joo, J. Lee, J. W. Huh, S. K. Park, J. -H. Han, N. S. Cho, J. Hwang, H. Y. Chu, and J. -I. Lee* “A random nano-structure scattering layer for suppression of micro-cavity effect and light extraction in OLEDs”, Optics Letters, 39, 3527-3530 (2014)

[70] [2014.5] Y. H. Kim^†, J. Lee^†, W. M. Kim, S. Hofmann, L. M. -Meskamp, and K. Leo “We Want Our Photons Back: Simple Nanostructures for White Organic Light-Emitting Diode Outcoupling”, Adv. Func. Mater, 24, 2553-2559 (2014) (^† equally contributed)

[69] [2014.4] J. Lee*, J. -W. Lee, N. S. Cho, J. Hwang, C. W. Joo, W. J. Sung, H. Y. Chu, and J. -I. Lee*, “Highly Efficient all phosphorescent white organic light-emitting diodes for solid state lighting applications”, Current Applied Physics, 14, S84-S87 (2014)

[68] [2014.3] H. -W. Chang, Y. H. Kim, J. Lee, S. Hofmann, B. Lüssem, Lars Mueller-Meskamp, Malte C. Gather, K. Leo*, and C. C. -Wu*, “Color-stable, ITO-free white organic light-emitting diodes with enhanced efficiency using solution-processed transparent electrodes and optical outcoupling layers” Organic Electronics, 15, 1028-1034 (2014)

[67] [2014.1] J. -W. Shin, D. -H. Cho, J. Moon, C. W. Joo, S. K. Park, J. Lee, J. -H. Han, N. S. Cho, J. Hwang, J. W. Huh, H. Y. Chu, and J. -I. Lee* “Random nano-structures as light extraction functionals for organic light-emitting diode applications”, Organic Electronics, 15, 196 (2014)

[66] [2014.1] C. W. Joo, J. Moon, J. -H. Han, J. W. Huh, J. Lee, N. S. Cho, J. Hwang, H. Y. Chu, and J. -I. Lee* “Color temperature tunable white organic light-emitting diodes”, Organic Electronics, 15. 189 (2014)

[65] [2014.1] J. -H. Lee*, J. Lee, Y. H. Kim, C. Yun, B. Lüssem, and K. Leo “Effect of trap states on the electrical doping of organic semiconductors”, Organic Electronics, 15, 16-21 (2013)

[64] [2013.11] H. -W. Chang^†, J. Lee^†, T. -W. Koh, S. Hofmann, B. Lüssem, S. Yoo*, C. C. -Wu*, K. Leo*, and M. C. Gather*, “Bi-directional organic light-emitting diodes with nanoparticle-enhanced light outcoupling”, Laser Photonics Rev. 7, 1079-1087(2013) (^† equally contributed)

[63] [2013.11] J. Lee, H. Cho, T. -W. Koh, C. Yun, S. Hofmann, J. -H. Lee, Y. H. Kim, B. Lüssem, J. -I. Lee, S. Yoo*, K. Leo, and M. C. Gather “Enhanced and balanced efficiency of white bi-directional organic light-emitting diodes”, Optics Express, 21, 28040-28047 (2013)

[62] [2013.11] J. Moon, J. W. Huh, C. W. Joo, J. -H. Han, J. Lee, H. Y. Chu, and J. -I. Lee, “Transparent organic LEDs for new lighting applications”, SPIE Newsroom, DOI: 10.1117/2.1201310.005197 (2013)

[61] [2013.10] J. Lee*, H. Cho, T. -W. Koh, S. Hofmann, Y. H. Kim, C. Yun, T. Schwab, S. Reineke, B. Lüssem, J. -I. Lee, S. Yoo*, K. Leo, and M. C. Gather “Straight-forward control of the degree of micro-cavity effects in organic light-emitting diodes based on a thin striped metal layer”, Organic Electronics, 14, 2444-2450 (2013)

[60] [2013.8] Y. H. Kim*, J. Lee*, S. Hofmann, M. C. Gather, L. M. -Meskamp, and K. Leo “Achieving high efficiency and improved stability in ITO-free transparent organic light-emitting diodes with conductive polymer electrodes”, Adv. Func. Mater. 23, 3763-3769 (2013)

[59] [2013.8] Y. H. Kim, J. S. Ki, W. M. Kim*, T.-Y. Seong, J. Lee, L. Müller-Meskamp*, and K. Leo, “Realizing the Potential of ZnO with alternative non-metal co-dopants as electrode for small molecule optoelectronic devices”, Adv. Func. Mater. 23, 3645-3652 (2013)

[58] [2013.8] J. W. Huh, J. Moon, J. W. Lee, J. Lee, D. –H. Cho, J. –W. Shin, J. –H. Han, J. Hwang, C. W. Joo, J. -I. Lee* and H. Y. Chu “Organic/Metal hybrid cathode for transparent organic light emitting diodes”, , Organic Electronics, 14, 2039-2045 (2013)

[57] [2013.5] H. -W. Chang, J. Lee, S. Hofmann, Y. H. Kim, L. Müller-Meskamp, B. Lüssem, C. C. -Wu*, K. Leo*, and M. C. Gather, “Nano-particle based scattering layers for optical efficiency enhancement of organic light-emitting diodes and organic solar cells”, J. Appl. Phys., 113, 204502 (2013)

[56] [2013.4] J. -W. Lee, J. Lee, H. Y. Chu, and J. -I. Lee*, “Controlling the optical efficiency of the transparent organic light-emitting diode using capping layers”, Journal of Information Display, 14, 57-60 (2013)

[55] [2013.4] C. Yun*, G. Xie, C. Murawski, J. Lee, F. Ventsch, K. Leo and M. C. Gather “Understanding the influence of doping in efficient phosphorescent organic light-emitting diodes with an organic p-i-n homojunction”, Organic Electronics, 14, 1695-1703 (2013)

[54] [2012.12] C. Yun*, J. Lee, J. -H. Lee, B. Lüssem, F. Ventsch, K. Leo, and M. C. Gather “Influence of phosphorescent dopants in organic light-emitting diodes with an organic homojunction”, Appl. Phys. Lett. , 101, 243303 (2012)

[53] [2012.10] J. -I. Lee, J. Lee, J. -W. Lee, D. -H. Cho, J. -W. Shin, J. -H. Han, and H. Y. Chu*, “Dependence of electron injection and transport materials on light-emitting characteristics of blue phosphorescent organic light-emitting diodes”, ETRI. J., 34, 690 (2012)

[52] [2012.9] D. -H. Hwang*, S. Lee, J. -H. Kim, and J. Lee, “Synthesis and characterization of a solution processible deep blue light-emitting molecule composed of fluorene and pyrene units”, Current Applied Physics, 12, e33-e37 (2012)

[51] [2012.11] H. -W. Chang⁺, Y. H. Kim⁺, J. Lee⁺, S. Hofmann, L. Müller-Meskamp, B. Lüssem, K. Leo* and C. -C. Wu* “Efficiency Enhancement in ITO-free Green Organic Light Emitting Diodes Utilizing Nano-Composite Scattering Films”, SID 2012 Digest, 43, 1496-1498 (2012) (⁺equally contributed)

[50] [2012.6] J. Lee*, S. Hofmann, M. Furno, Y. H. Kim, J. -I. Lee, H. Y. Chu, B. Lüssem, and K. Leo “Combined effects of micro-cavity and dielectric capping layer on bi-directional organic light-emitting diodes”, Optics Letters, 37 , 2007-2009 (2012)

[49] [2012.6] F. Xu, J. -Y. Kwon, J. -H. Kim, H. U. Kim, J. M. Lim, H. Cho, C. Lee, J. Lee, J. -I. Lee, and D. -H. Hwang, “Highly efficient yellow and white phosphorescent devices using a benzothiazole-liganded new iridium complex”, Synthetic Metals, 162, 1421-1428 (2012)

[48] [2012.05] S. -O. Kim, K. Thangaraju, S. Jung, W. Lu, S. M. Park, J. Lee, J. -I. Lee, H. Y. Chu, Y. -H. Kim, and S. -K. Kwon, “Highly Efficient Phosphorescent Organic Light Emitting Diodes Based on Iridium(III) Complex with Bulky Substituent Spacers” J. Nanosci. Nanotechnol.12, 4375-4378(2012)

[47] [2012.05] D. -H. Cho, J. -W. Shin, J.-I. Lee, J. Lee, J.-H. Han, and H. Y. Chu, “Light Extraction from Organic Light Emitting Diodes Using Chemically Etched Glass Substrates” J. Nanosci. Nanotechnol.12, 3447-3450 (2012)

[46] [2012.1] H. Park, J. Lee, I. Kang, H. Y. Chu, J. -I. Lee, S. K. Kwon* and Y. H. Kim* “Highly Rigid and Twisted Anthracene Derivatives: A Strategy for Deep Blue OLED Materials with Theoretical Limit Efficiency”, J. Mater. Chem. 22, 2695 (2012)

[45] [2011.8] J. Lee*, S. Hofmann, M. Thomschke, M. Furno, Y. H. Kim, B. Lüssem, and K. Leo “Highly efficient bi-directional organic light-emitting diodes by strong microcavity effects”, Appl. Phys. Lett. 99, 073303 (2011)

[44] [2011.8] J. Lee*, S. Hofmann, M. Thomschke, M. Furno, Y. H. Kim, B. Lüssem, and K. Leo “Increased and balanced light emission of transparent organic light-emitting diodes by enhanced microcavity effects”, Optics Letters, 36, 2931-2933 (2011)

[43] [2011.7] K. Thangaraju, J. Lee, J. -I. Lee, H. Y. Chu, S. -O. Kim, M. -G. Shin, Y. -H. Kim* and S. -K. Kwon*, “4,4′,4″-Tris(N-carbazolyl)-triphenylamine interlayer in highly efficient phosphorescent organic light emitting diodes based on tris[4-methyl-2-2(4′-trimethylsilylphenyl) pyridine]iridium complex ”, Thin Solid Films, 519, 6073-6076 (2011)

[42] [2011.5] J. Lee*, S. Hofmann, M. Furno, M. Thomschke, Y. H. Kim, B. Lüssem, and K. Leo “Systematic investigation of transparent organic light-emitting diodes depending on top metal electrode thickness”, Organic Electronics, 12, 1383-1388 (2011)

[41] [2011.05] K. Lee, J. -H. Park, M. -J. Park, J. Lee, H. -K. Shim, “Synthesis of New Fluorene-based Copolymers Containing an Antracene Derivative and Their Applications in Polymeric Light-Emitting Diodes”, J. Nanosci. Nanotechnol., 11, 4648-4657 (2011)

[40] [2011.4] J. Lee*, S. Hofmann, M. Furno, M. Thomschke, Y. H. Kim, B. Lüssem, and K. Leo “Influence of organic capping layers on the performance of transparent organic light-emitting diodes”, Optics Letters, 36, 1443-1445 (2011)

[39] [2011.2] J. Lee, J. -I. Lee, J. -W. Lee, and H. Y. Chu*, “Interlayer engineering with different host material properties in blue phosphorescent organic light-emitting diodes”, ETRI. J. 33, 32 -38 (2011)

[38] [2010.10] D. Mi, H. U. Kim, S. Y. Lee, J. Lee, S. -C. Hong, S. Pyo, and D. -H. Hwang*, "Synthesis and Light-Emitting Properties of New Polyfluorene Copolymers Containing 2,3-Diphenylfumaronitril", Mol. Cryst. Liq. Cryst. , 530, 64-73 (2010)

[37] [2010.8] J. -W. Shin, D. -H. Cho, J. -I. Lee, J. Lee, J. -W. Lee, J. -H. Han, and H. Y. Chu, “Fabrication and characterization of Organic Light Emitting Diodes with Laser Patterned Anode”, Journal of Nanoelectronics and Optoelectronics, 5, 161-164 (2010)

[36] [2010.5] J. Lee, J. -I. Lee, J. -W. Lee, and H. Y. Chu*, “Effects of charge balance on device performances in deep blue phosphorescent organic light-emitting diodes”, Organic Electronics, 11, 1159-1164 (2010)

[35] [2010.2] M. -J. Park, J. Kwak, J. Lee, I. H. Jung, H. Kong, C. Lee, D. -H. Hwang, and H. -K. Shim, “Single Chain White Light Emitting Polyfluorene Copolymers Containing Iridium Complex Coordinated on the Main Chain”, Macromolecules, 43, 1379-1386 (2010)

[34] [2010.1] M. -J. Park, J. Lee, I. H. Jung, J. -H. Park, H. Kong, D. -H. Hwang*, and H. -K. Shim*, “Synthesis, Characterization and Electroluminsecence of new Polyfluorene Coplolymers with Isophorone Derivative as a T-Shape Comonomer”, J. Polym. Sci. Part A, 48, 82-90 (2010)

[33] [2009.12] J. Lee, J. -I. Lee, J. Y. Lee, and H. Y. Chu*, “Improved performance of blue phosphorescent organic light-emitting diodes with a mixed host system”, Appl. Phys. Lett., 95, 253304-1-3 (2009)

[32] [2009.12] J. Lee, J. -I. Lee, and H. Y. Chu*, “Improved performances of white phosphorescent organic light-emitting diodes through mixed host structure”, ETRI. J., 31, 642-646 (2009)

[31] [2009.12] J. -H. Eom, D. Mi, M. -J. Park, H. -J. Cho, J. Lee, J. -I. Lee, H. Y. Chu, H. -K. Shim, and D. -H. Hwang "Synthesis and Properites of a POSS-based New Light-Emitting Nanoparticle", J. Nanosci. Nanotechnol., 8, 7029-7033 (2009)

[30] [2009.11] J. Lee, J. -I. Lee, J. Y. Lee, and H. Y. Chu*, “Stable efficiency roll-off in blue phosphorescent organic light-emitting diodes by host layer engineering”, Organic Electronics, 10, 1529-1533 (2009)

[29] [2009.10] J. Lee, J. -I. Lee, J. Y. Lee, and H. Y. Chu*, “High efficiency deep blue phosphorescent organic light-emitting diodes using a double emissive layer structure”, Synthetic Metals, 159, 1956-1959 (2009)

[28] [2009.9] J. -H. Choi, C. -H. Jung, J. Y. Kwon, H. -J. Cho, J. Lee, J. -I. Lee, H. Y. Chu, and D. -H. Hwang, “Solution processable organic electro-phosphorescent iridium complex based on a benzothiazole derivative”, Synthetic Metals, 159, 1517-1521 (2009)

[27] [2009.8] M. -J. Park, J. Lee, J. Kwak, I. H. Jung, J. -H. Park, H. Kong, C. Lee, D. -H. Hwang*, and H. -K. Shim*, “Synthesis and Electroluminsecence of new Polyfluorene Copolymers with containing Iridium complex coordinated on the main chain”, Macromolecules, 42, 5551-5557 (2009)

[26] [2009.8] J. Lee, J. -I. Lee, and H. Y. Chu*, “Investigation of double emissive layer structures on phosphorescent blue organic light-emitting diodes”, Synthetic Metals, 159, 1460-1463 (2009)

[25] [2009.6] J. Lee, J. -I. Lee, J. Lee, J. Y. Lee, D. M. Kang, W. Yuan, S. -K. Kwon, and H. Y. Chu*, “Efficient white phosphorescent organic light-emitting diodes for solid state lighting applications by using an exciton confining emissive layer structure”, Journal of Information Display, 10, 92-95 (2009)

[24] [2009.5] J. Lee, J. -I. Lee, J. Y. Lee, and H. Y. Chu*, “Enhanced efficiency and reduced roll-off in blue and white phosphorescent organic light-emitting diodes with a mixed host structure”, Appl. Phys. Lett., 94, 193305-1-3 (2009)

[23] [2009.5] J. Lee, J. -I. Lee, and H. Y. Chu*, "Efficient and color stable phosphorescent white organic light emitting devices based on an ultra wide band-gap host", Synthetic Metals, 159, 991-994 (2009)

[22] [2009.2] H. J. Cho, M. -J. Park, D.-H. Hwang, T. Ahn, J. -W. Hong, J. Lee, N. S. Cho, and H.-K. Shim, "Synthesisand Characterization of Fluorene-Based Copolymers Containing Siloxane or Distilbene Moieties on Their Main Chain", J. Polym. Sci. Part A, 47, 1595-1608 (2009)

[21] [2008.11] M. -J. Park, J. Lee, I. H. Jung, J. -H. Park, D. -H. Hwang*, and H. -K. Shim*, "Synthesis, Characterization and Electroluminescence of Polyfluorene Copolymers with Phenothiazine derivative; Their applications to high Efficiency Red and White PLED", Macromolecules, 41, 9643-9649 (2008)

[20] [2008.10] J. Y. Park, J. Lee, and J. -B. Kim*, "Photo-patternable electroluminescent blends of polyfluorene derivatives and charge transporting molecules", Eur. Polym. J., 44, 3981-3986 (2008)

[19] [2008.10] J. Lee*, H. Y. Chu, J. -I. Lee, K. -I. Song, and S. J. Lee, "Efficient White Phosphorescent Organic-Light-Emitting Devices for Lighting Application", J. Nanosci. Nanotechnol. 8, 5185-5187 (2008)

[18] [2008.10] J. -I. Lee, H. Y. Chu, J. Lee, and S. M. Chung, "Triplet harvesting for Efficient White Organic Light Emitting Diodes", J. Nanosci. Nanotechnol. 8, 5602-5605 (2008)

[17] [2008.10] I. H. Jung, Y. K. Jung, J. Lee, J. -H. Park, H. Y. Woo, J. -I. Lee, H. Y. Chu, and H. -K. Shim, "Synthesis and Electroluminescent Properties of Fluorene-based Copolymers Containing Electron-Withdrawing Thiazole Derivatives", J. Polym. Sci. Part A. 46, 7148-7161 (2008)

[16] [2008.10] J. -I. Lee, H. Y. Chu, J. Lee, and S. M. Chung, "Exciton confinement and triplet harvesting for efficient white organic light emitting diodes", Mol. Cryst. Liq. Cryst. 491, 1-8 (2008)

[15] [2008.5] J. Lee, J. -I. Lee, K. -I. Song, S. J. Lee, and H. Y. Chu*, "Effects of interlayer on phosphorescent blue organic light-emitting diodes", Appl. Phys. Lett. 92, 203305-1-3 (2008)

[14] [2008.5] M. -J. Park, J. Lee, J. -H. Park, S. K. Lee, J. -I. Lee, H. -Y. Chu, D. -H. Hwang*, and H. -K. Shim*, "Synthesis and Electroluminescence of new Polyfluorene Copolymers with Phenothiazine Derivative; Their Application in White-Light-Emitting Diodes", Macromolecules, 41, 3063-3070 (2008)

[13] [2008.3] J. Lee, J. -I. Lee, K. -I. Song, S. J. Lee, and H. Y. Chu*, "Influence of doping profile on the efficiency of blue phosphorescent OLEDs", Appl. Phys. Lett. 92, 133304-1-3 (2008)

[12] [2007.12] H. J. Cho, D.-H. Hwang, J.-D. Lee, N.-S. Cho, S.-K. Lee, J. Lee, Y.K. Jung, and H.-K. Shim, "Synthesis and Characterization of Novel Germanium-Containing Poly(p-phenylenevinylene) Derivatives", J. Polym. Sci. Part A, 46, 979-988(2007)

[11] [2007.9] S.K. Lee, B. -J. Jung, T. Ahn, Y. K. Jung, J.-I. Lee, I.-N. Kang, J. Lee, J.-H. Park, and H.-K. Shim, "White Electroluminescence from a Single Polyfluorene Containing bis-DCM units", J. Polym. Sci. Part A, l 45, 3380-3390 (2007)

[10] [2007.6] J.-H. Park, D. S. Chung, J. -W. Park., T. Ahn, H. Kong, Y. K. Jung, J. Lee, M. H. Yi, C. E. Park, S.-K. Kwon, and H. -K. Shim, “Soluble and Easily Crystallized Anthracene Derivatives: Precursors of Solution-Processable Semiconducting Molecules”, Organic Letter, 9, 2597-2576 (2007)

[9] [2007.5] S. K. Lee, T. Ahn, N. S. Cho, J. –I. Lee, Y. K. Jung, J. Lee, and H. K. Shim, "Synthesis of New Polyfluorene Copolymers with a Comonomer Containing Triphenylamine units and Its Applications in White Light-Emitting Diodes" J. Polym. Sci. Part A, 45, 1199-1209 (2007)

[8] [2007.5] J. Lee, J. -I. Lee, M.-J. Park, Y. K. Jung, H. J Cho, D.-H. Hwang, S.-K. Lee, J.-H. Park, J. Hong, H. Y. Chu, and H. -K. Shim*, “Phenothiazine-S,S-dioxide and Fluorene based Light-Emitting Polymers : Introduction of e-deficient S,S-dioxide into e-rich phenothiazine”J. Polym. Sci. Part A, 45, 1236-1246 (2007)

[7] [2006.7] J. M. Kang, H.J. Cho, J. Lee, J. Lee, S.-K. Lee, N. S. Cho, D.-H. Hwang, and H.-K. Shim, "The Highly Bright and Efficient Electroluminescence of New PPV Derivatives Containing Polyhedral Oligomeric Silsesquioxanes (POSSs) and of Their Blends", Macromolecules, 39, 4999-5008 (2006)

[6] [2006.6] H.J. Cho, D.-H. Hwang, Y.-K. Jung, S.-K. Lee, J.-H. Park, J. Lee, and H.-K. Shim, “The First Electroluminescent Polyhedral Oligomeric Silsesquioxane (POSS)-Based Nanoparticle”, Chem. Mater. 18, 3780-3787 (2006)

[5] [2006.5] J. Lee, H. J. Cho, N. S. Cho, D. H. Hwang, J. M. Kang, E. Lim, J. I. Lee, and H. -K. Shim*, "Enhanced Efficiency of Polyfluorene Derivatives: Organic-Inorganic Hybrid PLEDs", J. Polym. Sci. Part A, 44, 2943-2954 (2006)

[4] [2006.3] J. Lee, H. J. Cho, N. S. Cho, D. H. Hwang, and H. -K. Shim*, "Synthesis of Polyhedral Oligomeric Silsesquioxane-Functionalized Polyfluorenes: Hybrid Organic-Inorganic pi-Conjugated Polymers", Synthetic Metals, 156, 590-596 (2006)

[3] [2006.1] N. S. Cho, J. H. Park, J. Lee, S. K. Lee, H. -K. Shim, M. J. Park, D. H. Hwang, and B. J. Jung, "Saturated Efficient Red Light-Emitting Fluorene-Based Alternating Polymers Containing Phenothiazine Derivatives", Macromolecules, 39, 177-183 (2006)

[2] [2005.11] J. Lee, N. S. Cho, J. Lee, S. K. Lee, and H. -K. Shim*, "Emission Color Tuning of New Fluorene-based Alternating Copolymers Containing Low Band Gap Dyes", Synthetic Metals, 155, 73-79 (2005)

[1] [2004.11] J. Lee, H. J. Cho, B. J. Jung, N. S. Cho, and H. -K. Shim*, "Stabilized Blue Luminescent Polyfluorene: IntroductingPolyhedral Oligomeric Silsesquioxane, Macromolecules., 37, 8523-8529 (2004)

7. Publications – Conference Proceedings

(Roughly in reverse chronological order)

[15] [2017.5] J. S. Lee, Y. S. Shim, C. H. Park, H. Hwang, J. G. Kim, C. W. Joo, W. J. Sung, J. Lee, Y. W. Park, and B. -K. Ju, “Enhanced Light Extraction from Organic Light-Emitting Diodes using a Quasi-periodic Nanostructure”, SID 2017 Digest, 48, 1947-1948 (2017)

[14] [2016.6] B. Pyo, H. S. Kim, C. W. Joo, B. -H. Kwon, J. -I. Lee, J. Lee, and M. C. Suh, “Improvement of viewing angle dependence and out-coupling efficiency of OLEDs with strong Microcavity structure by introduction of nanoporous polymer films” SID Digest, 47, 1792 (2016)

[13] [2013.05] J. -I. Lee, C. W. Joo, J. W. Huh, J. -W. Shin, D. -H. Cho, J. Moon, S. K. Park, J. Hwang, N. S. Cho, J. Lee, J.-H. Han, and H. Y. Chu* “Highly Efficient Transparent Organic Light Emitting Diodes with an internal Random Nano-structured Scattering Layer”, SID 2014 Digest, 45, 750-753 (2014)

[12] [2013.05] J. Moon, S. K. Park, J. Hwang, N. S. Cho, C. W. Joo, J. W. Huh, J.-H. Han, J.-W. Shin, D.-H. Cho, J. Lee, J. T. Ahn, J. T. Lim, H. Y. Chu and J.-I. Lee* “Organic Wrinkles as Optical Scattering Sources”, SID 2013 Digest, 44, 1395-1396 (2013)

[11] [2010.10] J.Lee, J. -I. Lee, J. -W. Lee, D. -H. Cho, J. -H. Han, J. -W. Shin, and H. Y. Chu, “Dependence of Cs-doped electron transport materials on light-emitting characteristics of blue phosphorescent organic light-emitting diodes”, Proceedings of International Meeting on Information Display 2010, 578-579(2010)

[10] [2010.10] J. -I. Lee, J.Lee, D. -H. Cho, J. -H. Han, J. -W. Shin, and H. Y. Chu, “Hybrid White Organic Light Emitting Diode for Display Applications”, Proceedings of International Meeting on Information Display 2010, 448-449(2010)

[9] [2010.10]J. -W. Lee, J. -I. Lee, J. Lee, D. -H. Cho, J. -H. Han, J. -W. Shin, S. H. Kim, and H. Y. Chu, “Improvement and Control of Light Extraction in Transparent Organic Light Emitting Diodes through Capping Layer Engineering”, Proceedings of International Meeting on Information Display 2010, 261-262(2010)

[8] [2009.10] J. Lee, J. -I. Lee, J. Y. Lee, and H. Y. Chu, “Stable efficiency roll-off in blue phosphorescent organic light-emitting diodes using a mixed host structure”, Proceedings of International Meeting on Information Display 2009, 192-195 (2009)

[7] [2009.10] J. -I. Lee,  J. Lee, J. -W. Lee, J. -H. Shin, and H. Y. Chu, “Highly efficient and transparent white OLED for lighting”, Proceedings of International Meeting on Information Display 2009,  482-485 (2009)

[6] [2009.9] J. Lee, J. -I. Lee, and H. Y. Chu, “Mixed host system for enhanced efficiency and reduced roll-off in blue and white phosphorescent organic light-emitting diodes”, Proceedings of the 29thInternational Display Research Conference -Eurodisplay2009, 35-38(2009)

[5] [2009.8] J. -I. Lee, J. Lee, J. -W. Lee, J. -H. Shin,C. -S. Hwang, and H. Y. Chu, “Transparent White Organic Light Emitting Diodes with Improved Cathode Transparency”, Proceedings of SPIE Optics+Photonics, 7415(1), 74150Y-1-7 (2009)

[4] [2008.10] J. Lee, J. -I. Lee, K. -I. Song, S. J. Lee, and H. Y. Chu, “Efficient and color stable phosphorescent white organic light emitting devices using ultra wide band gap host materials”, Proceedings of International Meeting on Information Display 2008, 8, 1116-1119 (2008)

[3] [2008.2] J. Lee, J. -I. Lee, H. Y. Chu, K. -I. Song, and S. J. Lee, "Improvements of Phosphorescent White OLEDs Efficiency as promising Solid State Lighting", DSSL'08 Proceeding of The 2nd International Conference on Display and Solid State Lighting, Journal of LED and Solid State Lighting, 195-197 (2008)

[2] [2007.8] J. -M. Kang, H. -J. Cho, J. -H. Eom, J. I. Lee, S. -K. Lee, J. Lee, N. -S. Cho,H. -K. Shim, and D. -H. Hwang, “Highly Efficient Light-Emitting PPV Derivatives Containing Polyhedral Oligomeric Silsesquioxanes (POSSs)”, Proceedings of International Meeting on Information Display 2007, 7, 667(2007)

[1] [2006.8] J. -M. Kang, J. Lee, H. -J. Cho, , H. -K. Shim, and D. -H. Hwang, “Syntheses and light-emitting properties of new PPV derivatives containing polyhedral oligomeric silsesquioxanes (POSSs)”, Proceedings of International Meeting on Information Display 2006, 6, 1421 (2006)