Research Groups

유기반도체 연구실

Organic Semiconductor Lab

Prof. : Prof. Lee, Changhee

Research Area : 전자물리 및 레이저

  • About the Laboratory & Research Area
  • Organic semiconductors have attracted considerable attention due to their excellent optical and electrical properties as well as good processing methods. Organic light-emitting diodes (OLED) have been already commercialized, and organic thin film transistors (OTFT) have been considered as a long term solution for the flexible and low-cost electronics. Furthermore, organic photovoltaic cells (OPV) have shown their potential as the next generation solar cells. Our lab is conducting the research on device engineering based on the deep understanding of intrinsic properties of organic semiconductor. Also, we recently focus on the developing the next generation LED and PV based on quantum-dots and organic-inorganic hybrid materials.
  • Research Interests & Projects
  • ▶ Research interests
    - Organic light-emitting diodes (OLED) and quantum dot light-emitting diodes (QD-LED) display
    - Organic thin film transistors (OTFT) and oxide thin film transistors
    - Organic solar cells, quantum dot solar cells, and organic-inorganic hybrid solar cells
    - Printing technology in organic-inorganic electronic devices
    ▶ Research projects
    - Energy Experts Development Program - Organic and Quantum Dot Solar Cells GET-FUTURE Laboratory
    - Global Frontier Program – Three-dimensional multiscale photoenergy technology
    - Technology Development Program to Solve Climate Changes - Efficient Polymer-Nanoparticle Hybrid Solar Cell Structure
    - Industrial Strategic technology development program – Material and device development of common and emissive layer with under 4V driving voltage and over 50,000hr lifetime characteristics for 50inch class AMOLED TV applications
    - Industrial Strategic technology development program – Development of high performance (>50cm2/Vs) chalcogenide TFT backplane and cadmium-free highly efficient (>30cd/A) hybrid EL material/devices
    - Academic-industrial cooperation with Cheil Industries, and LG Display
  • Journals & Patents
  • [1] Jeonghun Kwak, Jaehoon Lim, Myeongjin Park, Seonghoon Lee, Kookheon Char and Changhee Lee, “High-power genuine ultraviolet light-emitting diodes based on colloidal nanocrystal quantum dots,” Nano Letters 15, 3793 (Jun, 2015)
    [2] Hyunkoo Lee, Jeonghun Kwak, Chan-Mo Kang, Yi-Yeol Lyu, Kookheon Char and Changhee Lee, “Trap-level-engineered common red layer for fabricating red, green, and blue subpixels of full-color organic light-emitting diode displays”, Optics Express 23, 11424 (May, 2015)
    [3] Myeongjin Park, Seok-Heon Jung, Jaehoon Lim, Dae-Young Kim, Hee-Jin Kim, Seungyong Lee, Heeyoung Jung, Seonghoon Lee, Changhee Lee, Jin-Kyun Lee, Semiconductor Nanocrystals in Fluorous Liquids for the Construction of Light-Emitting Diodes, Journal of Materials Chemistry C 3, 2759 (Mar, 2015)
    [4] Jaehoon Lim, Byeong Guk Jeong, Myeongjin Park, Jai Kyeong Kim, Jeffrey M. Pietryga, Young-Shin Park, Victor I. Klimov, Changhee Lee, Doh C. Lee and Wan Ki Bae, “Influence of Shell Thickness on the Performance of Light-Emitting Devices Based on CdSe/Zn1-XCdXS Core/Shell Heterostructured Quantum Dots”, Advanced Materials 26, 8034 (Dec, 2014)
    [5] Woo-Young Park, Yongwon Kwon, Changhee Lee and Ki-Woong Whang, “Light outcoupling enhancement from top-emitting organic light-emitting diodes made on a nano-sized stochastic texture surface”, Optics Express 22, A1687 (Dec, 2014)
    [6] Wan Ki Bae, Jaehoon Lim, Donggu Lee, Myeongjin Park, Hyunkoo Lee, Jeonghun Kwak, Kookheon Char, Changhee Lee and Seonghoon Lee, “R/G/B/Natural White Light Thin Colloidal Quantum Dot-Based Light-Emitting Devices”, Advanced Materials 26, 6387 (Oct, 2014)
    [7] Jeongkyun Roh, Chan-mo Kang, Jeonghun Kwak, Changhee Lee, and Byung Jun Jung, “Overcoming tradeoff between mobility and bias stability in organic field-effect transistors according to the self-assembled monolayer chain lengths”, Applied Physics Letters 104, 173301 (Apr, 2014)
    [8] Wan Ki Bae, Young-Shin Park, Jaehoon Lim, Donggu Lee, Lazaro A. Padilha, Hunter McDaniel, Istvan Robel, Changhee Lee, Jeffrey M. Pietryga, Victor I. Klimov, Controlling the influence of Auger recombination on the performance of quantum-dot light-emitting diodes, Nature Communications 4, 2661 (Oct, 2013)
    [9] M. Thambidurai, Jun Young Kim, Jiyun Song, Youngjun Ko, Hyung-jun Song, Chan-mo Kang, N. Muthukumarasamy, Dhayalan Velauthapillaic and Changhee Lee, “High performance inverted organic solar cells with solution processed Ga-doped ZnO as an interfacial electron transport layer”, Journal of Materials Chemistry C 1, 8161 (Oct, 2013)
    [10] Hyunduck Cho, Sunyoung Lee, Nam Sung Cho , Ghassan E. Jabbour, Jeonghun Kwak, Do-Hoon Hwang, and Changhee Lee, “High-Mobility Pyrene-Based Semiconductor for Organic Thin-Film Transistors”, ACS Applied Materials & Interfaces 5, 3855 (Apr, 2013)
    [11] Jeonghun Kwak, Wan Ki Bae, Donggu Lee, Insun Park, Jaehoon Lim, Myeongjin Park, Hyunduck Cho, Heeje Woo, Do Y. Yoon, Kookheon Char, Seonghoon Lee and Changhee Lee, “Bright and efficient full-color colloidal quantum dot light-emitting diodes using an inverted device structure|, Nano Letters 12, 2362 (Apr, 2012)
    [12] Donggu Lee, Wan Ki Bae, Insun Park, Do Y. Yoon, Seonghoon Lee and Changhee Lee, “Transparent electrode with ZnO nanoparticles in tandem organic solar cells”, Solar Energy Materials & Solar Cells 95, 365 (Jan, 2011)
    [13] Wan Ki Bae, Jeonghun Kwak, Jaehoon Lim, Donggu Lee, Min Ki Nam, Kookheon Char, Changhee Lee, and Seonghoon Lee, “Multicolored Light-Emitting Diodes Based on All-Quantum-Dot Multilayer Films Using Layer-by-Layer Assembly Method”, Nano Letters 10, 2368 (Jul, 2010)