Advanced

71. (Invited) Donggu Lee, Jin Young Jang and Dae Geun Song, High current photoconductor-based P3HT:PCBM organic photodetector, 2023년 한국센서학회 추계학술대회, Oct. 11-13, 2023, The Ocean Resort, Yeosu, Korea. (Oral presentation)

70. Kyung Jae Lee, Eunyong Seo, Dong Hyun Kim, Jin Young Jang, Dae Geun Song and Donggu Lee , Numerical Simulation Study of Trap Effects on Charge Transport in Quantum Light-Emitting Diodes , The 23rd International Meeting on Information Display (IMID2023), Aug. 22-25, 2023, BEXCO, Busan, Korea. (Poster presentation : P2-253)

69. *Best poster paper award

Jeong Ha Hwang, Eunyong Seo, Dong Hyun Kim, Yeongho Choi, Yong Woo Kwon, Woon-ho Jong, Kyung Jae Lee, Jin Young Jang, Dae Geun Song, Jaehoon Lim and Donggu Lee, Multi-Stacked Hybrid Anode Structure for Enhanced Charge Balance in InP Quantum Dot Light-Emitting Diodes, The 23rd International Meeting on Information Display (IMID2023), Aug. 22-25, 2023, BEXCO, Busan, Korea. (Poster presentation : P2-207)

68. Sujin Park, Jeong Ha Hwang, Jaehoon Lim, Donggu Lee and Wonho Lee , Investigation of Azide-Based Photo-Crosslinker for All-Solution Processed Quantum Dot Light-Emitting Diodes , The 23rd International Meeting on Information Display (IMID2023), Aug. 22-25, 2023, BEXCO, Busan, Korea. (Poster presentation : P2-199)

67. Dong Hyun Kim, Jeong Ha Hwang, Eunyong Seo, Kyung Jae Lee, Jin Young Jang, Dae Geun Song, Jaehoon Lim and Donggu Lee, Enhanced Hole Injection of Quantum Dot Light-Emitting Diode Using Multi-Layer Hole Transport Layer with PMA and VNPB Alternating Structure, The 23rd International Meeting on Information Display (IMID2023), Aug. 22-25, 2023, BEXCO, Busan, Korea. (Poster presentation : P2-197)

65. Jeong Ha Hwang and Donggu Lee, Multi-Functional Hole Injection Layer for Quantum Dot Light-Emitting Diodes, 한국전기전자재료학회 추계학술대회, Nov. 3-4, 2022, The-K hotel, Gyeongju, Korea. (Oral presentation: OA2-02)

64. Yejin Gim, Sujin Park, Donggu Lee, and Wonho lee, Synthesis of Conjugated Polymers for Improving Hole Transport Ability of Quantum Dots, The 22nd International Meeting on Information Display (IMID2022), Aug. 23-26, 2022, BEXCO, Busan, Korea. (Poster presentation : P3-102)

63. Jeong Ha Hwang, Hyun Su Jo, Kyung Jae Lee, Dong hyun Kim, Bong Young Kim, Seok Hyoung Lee, Min Young Choi, and Donggu Lee, Crosslinkable Functional Layer for All-Solution Quantum Dot Light-Emitting Diode, The 22nd International Meeting on Information Display (IMID2022), Aug. 23-26, 2022, BEXCO, Busan, Korea. (Poster presentation : P3-121)  

61. Jeong Ha Hwang, Junmo Kim, Byong Jae Kim, Jun Young Kim, Wonho Lee, Jaehoon Lim and Donggu Lee, Facilitated Hole Injection of Quantum Dot Light-Emitting Diodes adopting Multi-layered Hole Transport Layer, The 21st International Meeting on Information Display (IMID 2021), Aug. 25-27, 2021, COEX, Seoul, Korea. (Poster presentation : P17-3) 

59. [Invited] Donggu Lee, Facilitated Hole Injection of Quantum Dot Light-Emitting Diodes adopting Multi-layered Hole Transport Layer, 2020 International Conference on Display Technology, Oct. 11-14, 2020, China Optic Valley Convention & Exhibition Center Wuhan, China. (Oral presentation) 

58. Donggu Lee, Facilitated Hole Injection of Quantum Dot Light-Emitting Diodes adopting Multi-layered Hole Transport Layer, 2020 International Conference on Display Technology, Oct. 11-14, 2020, China Optic Valley Convention & Exhibition Center Wuhan, China. (Oral presentation) 

56. Jun Young Kim, M. Thambidurai, Donggu Lee, Hyung-Jun Song, Jiyun Song, Youngjun Ko, Ho Jung Syn and Changhee Lee, Enhanced photovoltaic performance of inverted polymer solar cells with Al-doped zinc oxide interfacial layer, 8th German-Korean Polymer Symposium, Aug.19-24, 2013, Hamburg, Germany. 

55. Jun Young Kim, M. Thambidurai, Hyung-Jun Song, Donggu Lee, Jiyun Song, Youngjun Ko, Ho Jung Syn, Changhee Lee, Enhanced photovoltaic performance of inverted polymer solar cells with doped ZnO interfacial layer, The 5th International Conference on Hybrid and Organic Photovoltaics, May 5-8, 2013, Sevilla, Spain. 

54. Myeongjin Park, Donggu Lee, Jaehoon Lim, Jung Hwa Seo, Jeonghun Kwak, Kookheon Char, Seonghun Lee, Changhee Lee, Improved Performance of Quantum Dot Light Emitting Diodes by Using Double Electron Transport Layers of Metal Oxides, 2013 MRS Spring Meeting & Exhibit, Apr. 1-5, San Francisco, California, USA. 

53. Donggu Lee, Jaehoon Lim, JunYoung Kim, Hyungjun Song, Hojung Syn, Jiyun Song, Youngjun Ko, Kookheon Char, Seonghoon Lee and Changhee Lee, Polymer-Nanocrystal Hybrid Solar Cells Using CdSe Tetrapod Network Structure, 2013 MRS Spring Meeting & Exhibit, Apr. 1-5, San Francisco, California, USA. (Poster presentation) 

52. Donggu Lee, Jaehoon Lim, Lisa zur Borg, Myeongjin Park, Hyunkoo Lee, Seonghoon Lee, Kookheon Char, Rudolf Zentel, Changhee Lee, Investigation of Hole Injection Barrier of Quantum Dot-Conducting Polymer Hybrids LEDs, The 20th Korean Conference on Semiconductors (KCS2013), Feb. 4-6, 2013, Welli Hilli Park, Korea. (Poster presentation: TP2-9) 

50. Jun Young Kim, Jason J. Amsden, Insun Park, Donggu Lee, Hyung-Jun Song, Do Y. Yoon, Changhee Lee, Temperature and Light Intensity Study of Poly(phenylene vinylene):ZnO Hybrid Bulk Hetrojunction Solar Cells with Semiconducting Surfactants, MRS Fall meeting, Nov. 25-30, 2012, Boston, USA. 

49. Ho Jung Syn, Heykyoung Choi, Mariyappan Thambidurai, Donggu Lee, Jun Young Kim, Jiyun Song, Hyung-Jun Song, Youngjun Ko, Sohee Jeong, and Changhee Lee, ZnO as Electron transport materials in Colloidal Quantum Dot Solar Cells, Global Photovoltaic Conference 2012 (GPVC 2012) & Korea-EU International Symposium on Photovoltaics, Nov. 19-21, 2012, Bexco, Busan, Korea. 

48. Donggu Lee, Jaehoon Lim, Jun Young Kim, Hyung-Jun Song, Myeongjin Park, Jiyun Song, Ho Jung Syn, Youngjun Ko, Kookheon Char, Seonghoon Lee, Changhee Lee, Study on Surfactants of CdSe Quantum Dots for Solar Cell Application, Global Photovoltaic Conference 2012 (GPVC 2012) & Korea-EU International Symposium on Photovoltaics, Nov. 19-21, 2012, Bexco, Busan, Korea. (Poster presentation) 

47. Hyung-Jun Song, Donggu Lee, Jun Young Kim, Jiyun Song, Ho Jung Syn, Youngjun Ko, Changhee Lee, The effect of donor-acceptor mixing ratio and substrate temperature on the performance of organic solar cells, Global Photovoltaic Conference 2012 (GPVC 2012) & Korea-EU International Symposium on Photovoltaics, Nov. 19-21, 2012, Bexco, Busan, Korea. 

46. Jiyun Song, Won Tae Choi, Tae-Hwan Kim, Donggu Lee, Young-Soo Han, Hyung-Jun Song, Jun Young Kim, Youngjun Ko, Ho Jung Syn, Kookheon Char, Changhee Lee, Control of Morphology in P3HT:PCBM Bulk Heterojunction Solar Cells through an Additive-solvent-induced Process, Global Photovoltaic Conference 2012 (GPVC 2012) & Korea-EU International Symposium on Photovoltaics, Nov. 19-21, 2012, Bexco, Busan, Korea.(Poster presentation, Best Poster Presentation Award) 

45. Jun Young Kim, Jungho Park, Donggu Lee, Hyung-Jun Song, Ho Jung Syn, Jiyun Song, Youngjun Ko, Changhee Lee, Effects of active layer thickness and thermal annealing based on PCDTBT:PCBM bulk heterojunction solar cells, Global Photovoltaic Conference 2012 (GPVC 2012) & Korea-EU International Symposium on Photovoltaics, Nov. 19-21, 2012, Bexco, Busan, Korea. 

44. Youngjun Ko, Hyunkoo Lee, Donggu Lee, Jun Young Kim, Hyung-Jun Song, Yongwon Kwon, Jiyun Song, Ho Jung Syn, Changhee Lee, Characteristic Analysis of Polymer Solar Cells by Using Potassium Borohydride as an Electron Injection Layer, Global Photovoltaic Conference 2012 (GPVC 2012) & Korea-EU International Symposium on Photovoltaics, Nov. 19-21, 2012, Bexco, Busan, Korea. 

43. Myeongjin Park, Donggu Lee, Jaehoon Lim, Kookheon Char, Seonghun Lee and Changhee Lee, Effects of Different Metal Oxide Electron Transport Layers in Inverted Quantum Dot Light Emitting Diodes, International Liquid Crystal Conference 2012, Aug 19-24, 2012, Mainz, Germany. 

42. Hyung-Jun Song, Jun Young Kim, Donggu Lee, Jiyun Song, Youngjun Ko, Jeonghun Kwak ,Changhee Lee, Origin of the Mixing Ratio Dependence of Power Conversion Efficiency in Bulk Heterojunction Organic Solar Cells with Low Donor Concentration, Nano Korea 2012, August 16-18, 2012, Seoul, Korea. (Poster presentation, Best Poster Award) 

41. Jiyun Song, Donggu Lee, Jun Young Kim, Hyung-Jun Song, Youngjun Ko, and Changhee Lee, Enhanced Performance of P3HT/PCBM Bilayer Solar Cells by Employing P3HT Nanofibers Structure, International Conference on Science and Technology of Synthetic Metals 2012, July 8-13, 2012, Atlanta, USA. 

40. Jiyun Song, Won-Tae Choi, Donggu Lee, Kookheon Char, Changhee Lee, Improved Performance of P3HT:PCBM Solar Cells by Employing P3HT-nanowires, 한국유기태양전지학회 하계심포지엄, June 27, 2012, KRICT, Korea. 

39. Donggu Lee, Jaehoon Lim, Kookheon Char, Seonghoon Lee, Changhee Lee, Polymer-Nanoparticle Bulk-hetrojunction Solar Cells with Various Surface Modification, 한국유기태양전지학회 하계심포지엄, June 27, 2012, KRICT, Korea. (Poster presentation) 

38. Myeongjin Park, Hyunduck Cho, Hyunkoo Lee, Donggu Lee, Jaehoon Lim, Kookheon Char, Seonghun Lee, and Changhee Lee, Efficient red, green, and blue QD-LEDs fabricated with the QD transplanting process on a common hole-transport layer, 50th SID International Symposium, Seminar & Exhibition, June. 7, 2012, Boston, USA. (P.72) 

37. Jiyun Song, Donggu Lee, Jun Young Kim, Hyung-Jun Song, Youngjun Ko, and Changhee Lee, P3HT 나노 섬유 구조를 이용한 이층 박막 유기 태양전지, The 19th Korean Conference on Semiconductors, Feb. 15-17, 2012, Seoul, Korea. 

35. Donggu Lee, Jaehoon Lim, JunYoung Kim, Myeongjin Park, Youngjun Ko, Kookheon Char, Seonghoon Lee, Changhee Lee, and Jeonghun Kwak, Thermal Annealing Effect on P3HT:CdSe Nanoparticle Bulkheterojunction Solar Cells, 2011 MRS Fall Meeting, Nov. 28 - Dec. 2, 2011, Hynes Convention Center, Boston, MA, USA. (Poster presentation, H3.67) 

34.  Jason J. Amsden, Insun Park, Younhee Lim, Donggu Lee, Michael Meister, Jun-Mo Park, Ki-Young Yoon, Jun Young Kim, Raja S. Ashraf, Iain McCulloch, TaeLim Choi, Laquai Frederic, Changhee Lee, Klaus Muellen, Do Y. Yoon, Semiconducting Polymer - ZnO Hybrid Bulk Heterojunction Photovoltaic Solar Cells with Semiconducting Surfactants, 2011 MRS Fall Meeting,  Nov. 28 - Dec. 2, 2011, Hynes Convention Center, Boston, MA, USA. (H9.28) 

33. Jun Young Kim, Seunguk Noh, Donggu Lee, and Changhee Lee, Effect of Sol-Gel Derived ZnO Interfacial Layer on the Photovoltaic Properties of Polymer Solar Cells, 21st International Photovoltaic Science and Engineering Conference, Nov., 2011, Fukuoka, Japan. (4D-5P-10) 

32. Jason J. Amsden, Insun Park, Younhee Lim, Sangtaik Noh, Donggu Lee, Michael M. Meister, Jun-Mo Park, Ki-Young Yoon, Jun Young Kim, Raja Shahid Ashraf, Iain Mc Culloch, Tae Lim Choi, Frederic Laquai, Changhee Lee, Klaus Mullen, Do Yeung Yoon, Semiconducting Polymer-ZnO Hybrid Bulk Heterojunction Photovoltaic Solar Cells with Semiconducting Surfactants, The 12th Pacific Polymer Conference, Nov., 2011, Jeju, Korea. (PS434) 

31. Lisa Zur Borg, Jaehoon Lim, Donggu Lee, Changhee Lee, Kookheon Char, Rudolf Zentel, Synthesis of Semiconducting Block Copolymers and the Functionalization of Inorganic Nanostrures for Optoelectronic Devices, The 12th Pacific Polymer Conference, Nov., 2011, Jeju, Korea. (PS095) 

30. Jun Young Kim, Seunguk Noh, Donggu Lee, Jason J. Amsden and Changhee Lee, The Effect of Post-annealing Process in Polymer Solar Cell Based on P3HT:PCBM, International Conference on Advanced Electromaterials (ICAE2011), Nov., 2011, Jeju, Korea. (Poster presentation: p.120, Outstanding Poster Award) 

29. Hyunduck Cho, Jaehoon Lim, Myeongjin Park, Donggu Lee, Kookheon Char, Seonghoon Lee, and Changhee Lee, Full-color patterning of colloidal quantum dots on an organic hole transport layer using the transplanting technique, The 10th International Conference on Nanoimprint and Nanoprint (NNT2011), Oct., 2011, Jeju, Korea. (pp.280-281) 

28. Seunguk Noh, Jun Young Kim, Donggu Lee and Changhee Lee, Metal Oxide Nanoparticles as an Electron Extraction Layer for Inverted Polymer Solar Cells, International Meeting on Information Display (IMID 2011), Oct., 2011, KINTEX, Korea. (Poster presentation, Outstanding Poster Paper Award) 

27. Seung-Uk Noh, Donggu Lee, Junyoung Kim, Changhee Lee, Inverted Polymer Solar Cells with ZnO Layer by Different Fabrication Methods, Global Photovoltaic Conference 2011 (GPVC 2011) & The 6th Koera-China-Japan International Symposium on Photovoltaics, Sep. 28-30, 2011, Grand Hotel, Busan, Korea. 

26. Donggu Lee, Seunguk Noh, Jun Young Kim, Hyunkoo Lee, Jeonghun Kwak, and Changhee Lee, Temperature Dependence of Current-Voltage Characteristics of Polymer Solar Cells with MoO3 and PEDOT:PSS as Hole Injection Layer, Nano Korea 2011, Aug., 2011, KINTEX, Korea. (Poster presentation) 

25. Seunguk Noh, Jun Young Kim, Donggu Lee, Yong-Ju Park, Jason J. Amsden, Do Y. Yoon and Changhee Lee, Effect of Solvent on the Performance of Inverted Polymer Solar Cells Based on P3HT:PCBM Bulk Heterojunction, The 22nd International Conference on Molecular Electronics and Devices, May. 19-20, 2011, Pohang, Korea. 

23. Jeonghun Kwak, Wan Ki Bae, Donggu Lee, Jaehoon Lim, Inseon park, Do Y. Yoon, Seonghoon Lee, Kookheon Char, Changhee Lee, Novel Device Structures and Fabrication Method for Colloidal Quantum Dot Based Light-emitting Diodes, 2010 MRS Fall Meeting, Nov. 29-Dec. 3, 2010, Boston, USA. 

22. Jaehoon Lim, Wan Ki Bae, Donggu Lee, Min Ki Nam, Joohyun Jung, Changhee Lee, Kookheon Char and Seonghoon Lee, Enhancement in Quantum Efficiency and Stability of III - V Quantum Dots by the Composition Gradient ZnSexS1-x Shells, 2010 MRS Fall Meeting, Nov. 29-Dec. 3, 2010, Boston, USA. 

21. Changhee Lee, Wan Ki Bae, Jeonghun Kwak, Jaehoon Lim, Donggu Lee, Min Ki Nam, Kookheon Char, and Seonghoon Lee, Efficient light-emitting diodes based on colloidal quantum dots for full-color displays, The Global R&D Center (GRDC) Symposium 2010, Nov. 15-16, 2010, Catholic University of Korea in Seoul, Korea. 

20. Changhee Lee, Wan Ki Bae, Jeonghun Kwak, Jaehoon Lim, Donggu Lee, Min Ki Nam, Kookheon Char, Seonghoon Lee, Full-Color Light-Emitting Diodes Based on Colloidal Quantum Dots, 218th The Electrochemical Society(ECS) Meeting, Oct.10-15, 2010, Las Vegas, USA. 

19. Jeonghun Kwak, Wan Ki Bae, Donggu Lee, Jaehoon Lim, Seonghoon Lee, Kookheon Char, Changhee Lee, Electrical and Optical Properties of Light-Emitting Devices Based on Colloidal Quantum-Dots and Conjugated Organic Materials, 8th International Conference on Electroluminescence & Organic Optoelectronics (ICEL 2010), Oct., 2010, University of Michigan, Ann Arbor, USA. 

18. Jun Young Kim, Seunguk Noh, Donggu Lee, Pradipta K Nayak, Yongtaek Hong, Changhee Lee, Solution Processible Zinc Oxide for the Polymer Solar Cell Based on P3HT:PCBM, IEEE NANO 2010 & Joint Symposium with Nano Korea 2010, Aug. 17-20, 2010, KINTEX, Korea. (Best Poster Award) 

17. Donggu Lee, Junyoung Kim, Seunguk Noh and Changhee Lee, The Thickness of Active Layer Dependence of Polymer Solar Cells, IEEE NANO 2010 & Joint Symposium with Nano Korea 2010, Aug. 17-20, 2010, KINTEX, Korea. (Poster presentation) 

16. Seunguk Noh, Donggu Lee, Junyoung Kim, Insun Park, Do Yeung Yoon, and Changhee Lee, Efficient inverted solar cells with ZnO films as a buffer layer, International Conference on Science and Technology of Synthetic Metals 2010, Jul., 2010, Kyoto, Japan. (6P-142) 

14. Jeonghun Kwak, Wan Ki Bae, Donggu Lee, Insun Park, Do Y. Yoon, Seonghoon Lee, Kookheon Char, Changhee Lee, Highly Efficient Quantum Dot Based Light - Emitting Diodes by Enhancing Carrier Injection and Transport, Materials Research Society 2009 Fall Meeting, Nov. 30 - Dec. 4, 2009, Boston, USA. 

13. Jun Young Kim, Seunguk Noh, Donggu Lee, Changhee Lee, Organic tandem solar cell using semi-transparent top electrode for both side light absorption, international Conference on Advanced Materials and Devices, Dec. 9-11, 2009, Jeju, Korea. 

12. Donggu Lee, Wan Ki Bae, Insun Park, Do Y. Yoonc, Seonghoon Lee, and Changhee Lee, Transparent electrode with ZnO nanoparticles in tandem organic solar cells, 19th International Photovoltaic Science and Engineering Conference and Exhibition, Nov. 9-13, 2009 ICC Jeju, Korea. (Poster presentation) 

11. Sangtaik Noh, Insun Park, Donggu Lee, Changhee Lee and Do Y. Yoon, Characterization of P3HT/ZnO Based Hybrid Photovoltaic Films, The 1st FAPS Polymer Congress, Oct. 20-23, 2009, Nagoya, Japan. 

10. Donggu Lee, Seunguk Noh, C. K. Suman, Junyoung Kim, Seonghoon Lee and Changhee Lee, Characteristics of Polymer Solar Cells Depending on the Thickness of Active Layer, 9th international Meeting on Information Display (iMiD 2009), Oct. 12-16, 2009, Kintex, Korea. (Oral presentation) 

9. Seunguk Noh, C. K. Suman, Donggu Lee, Jun Young Kim and Changhee Lee, Optical and electrical properties using different buffer layer on P3HT:PCBM bulk heterojunction organic solar cells, Self-Organized Materials for Optoelectronics, Aug 24-25, 2009, Mainz, Germany. 

8. Donggu Lee, Seunguk Noh, Junyoung Kim, Seonghoon Lee and Changhee Lee, Characteristics of Thickness Dependence of Polymer:fullerene Bulkhetrojuntion Solar Cells, IRTG International Workshop on Self-Organized Materials for Optoelectronics, Aug. 24-25, 2009, Mainz, Germany. (Poster presentation) 

7. Seunguk Noh, C. K Suman, Donggu Lee, Joonyoup Kim, Chang Hee Lee, and Yongtaek Hong, Effect of buffer layers on the performance of bulk heterojuction polymer solar cells, European Materials Research Society Spring Meeting, Jun., 2009, Strasbourg, France. 

5. Donggu Lee, Jeongho Park, Seunguk Noh, Junyoung Kim, Seonghoon Lee and Changhee Lee, Effect of Solution Processed Salt Layers on the Device Performances of Polymer Solar Cells, The 8th International Conference on Nano-Molecular Electronics (ICNME 2008), Dec. 16？18, 2008, Kobe, Japan. (Poster presentation) 

4. Seung-Uk Noh, Dong-gu Lee, Changhee Lee, Ji-Young Kim, Moon-Jae Lee, Won Jun Song, Perimeter effect with different hole-injection layers in polymer solar cells, The 7th International Conference on Electroluminescence of Molecular Materials and Related Phenomena (ICEL-7), Sep. 2-6, 2008, Dresden, Germany.  

3. Changhee Lee, Seunguk Noh, C. K. Suman and Donggu Lee, Study of the Effect of Buffer Layers on Electrical Properties of Organic Bulk-Hetrojunction Solar Cells, International Conference on Advanced Functional Polymers and Self-Organized Materials (ICPSM), Sep. 22-26, 2008, Paradise Hotel, Busan, Korea. (p. 59) 

2. Donggu Lee, Seunguk Noh, C. K. Suman, Seonghoon  Lee and Changhee Lee, Investigation of active layer thickness dependence of polymer solar cells   based on poly(3-hexylthiophene) by impedance spectroscopy, International Conference on Advanced Functional Polymers and Self-Organized Materials (ICPSM), Sep.  22-26, 2008, Busan, Korea. (Poster presentation)