세종캠퍼스

에너지광전변환연구실

에너지광전변환 연구실 (류승윤 교수: justie74@korea.ac.kr)


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연구실소개

  • Organic light emitting diode (OLED) is a light-emitting diode (LED) whose emissive electroluminescent layer is composed of a film of organic compounds. The first diode device was reported at Eastman Kodak by Dr. Ching W Tang and Steven Van Slyke in 1987[1]. This device used a novel two-layer structure with separate hole transporting and electron transporting layers such that recombination and light emission occurred in the middle of the organic layer. This resulted in a reduction in operating voltage and improvements in efficiency and led to the current area of OLED research and device production. There are two main families of OLED: those based on small molecules and those employing polymers. Research into polymer electroluminescence culminated in 1990 with J. H. Burroughes et al. at the Cavendish Laboratory in Cambridge reporting a high efficiency green light-emitting polymer based device using 100 nm thick films of poly(p-phenylene vinylene). However multilayer OLEDs can be fabricated with two or more layers in order to improve device efficiency. Another highly efficient white OLED device is to produce laminated structure. Kido believes that contains a structural unit N brightness white OLED can achieve a single OLED, N times, thus substantially increase the efficiency of the device. - Advantages of OLED: 1. Much faster response time. 2. Consume significantly less energy. 3. Able to display "True Black" picture. 4. Wider viewing angles. 5. Thinner display. 6. Better contrast ratio. 7. Safer for the environment. 8. Has potential to be mass produced inexpensively.

연구분야 (Research Interest)

연구분야 (Research Interest)
Research Interest OLEDs, Thin-Film Solar Cells (OPVs, a-Si:H thin film solar cells), secondary batteries, piezoelectric devices, Stretchable OLEDs, Perovskite OLEDs.
Project
  • ⦁ 바이오-항생제 등 차세대 유기-생체 물질을 이용한 인공지능소자의 응용을 위한 연구 (중견과제)
  • ⦁ 스트레쳐블 디스플레이를 위한 20%이상 신축성을 갖는 백플레인, 발광화소용 소재,소자,공정 원천기술개발(SDRC)
  • ⦁ 차세대 응용 태양전지 융복합기술 고급트랙(에너지인력양성)
  • ⦁ 초고속 금속 증착장치를 적용한 장수명 고휘도 OLED 용 방열판(heat sink) 증착공정 개발 (중소벤처기업부)
  • ⦁ 충남대학교 브릿지 / 기술 융복합 프로젝트 지원사업-신재생에너지 

연구실 구성원

현재

⦁ Hassan Hafeez (Post-Doc.)
⦁ Justin Jesuraj (Post-Doc.)
⦁ 김동현 (석박통합과정)
⦁ 이종찬 (석박통합과정)
⦁ 이창민 (석박통합과정)
⦁ 이원호 (석사과정)
⦁ 최대근 (석사과정)

연구실 졸업생 (과정 : 졸업년도)

 

연구실 연구업적

SCI Journal (selected)

⦁ "Highly reliable silver nanowire (AgNW) electrode stability through photoresist passivation", Microelectronic Engineering,   Vol. 206, 6~11, (2019)
⦁ "Harvesting Near- and Far-Field Plasmonic Enhancements from Large-Size Gold Nanoparticles for Enhanced Performance in Organic Bulk Heterojunction Solar Cells", Organic Electronics, Vol. 66, 94~101, (2019)
⦁ "Improvement of Charge Balance, Recombination Zone Confinement, and Low Efficiency Roll-off in Green Phosphorescent OLEDs by Altering Electron Transport Layer Thickness", Materials Research Express,  Vol. 5, 076201-1~8, (2018)
⦁ "Direction-Dependent Stretchability of AgNW Electrodes on Microprism-Mediated Elastomeric Substrates", AIP Advances, Vol. 8, 065227-1~9 (2018)
⦁ "Improved Charge Balance in Phosphorescent Organic Light-Emitting Diodes by Different Ultraviolet Ozone Treatments on Indium Tin Oxide", Organic Electronics, Vol. 61, 343-350 (2018)
⦁ "Enhanced Device Efficiency in Organic Light-Emitting Diodes by Dual Oxide Buffer Layer", Organic Electronics,  Vol. 56, 254−259, (2018)
⦁ "Recombination Zone Control without Sensing Layer and the Exciton Confinement in Green Phosphorescent OLEDs by excluding Interface Energy Transfer", Journal of Physical Chemistry C,  Vol. 122, 2951−2958, (2018)
⦁ "Effects of Doping Concentration and Emission Layer’s Thickness for Recombination Zone and Exciton Density Control in Blue Phosphorescent Organic Light-Emitting Diodes", ECS Journal of Solid State Science and Technology, 6 (12) R170-R174 (2017)
⦁ "Effects of the Wrinkle Structure and Flat Structure Formed during Static Low-Temperature Annealing of ZnO on the Performance of Inverted Polymer Solar Cells", The Journal of Physical Chemistry C, Vol. 121, 9191–9201, (2017)
⦁ "Improved Hydrogenated Amorphous Silicon Thin-Film Solar Cells by Replacing n-type Si Layer with PFN Interfacial Layer", Synthetic Metals,  Vol. 228, 91–98, (2017)
⦁ "The Correlation between Interlayer’s Thickness and Device Performance in Blue Phosphorescent Organic Light-Emitting Diodes with Quantum Well Structure", Organic Electronics,  Vol 42,  343-347, (2017)
⦁ "Optical absorption and electrical properties of enhanced efficiency in organic solar cells as interfacial layer with Au NPs", Sythetic Metals, Vol. 217, 117-122, 2016
⦁ "Effects of Gold-Nanoparticle Surface and Vertical Coverage by Conducting Polymer between ITO and Hole Transport Layer on Organic Light-Emitting Diodes", ACS Applied Materials & Interfaces, Vol. 7(27), pp 15031–15041, 2015
⦁ "Heavily Doped, Charge-Balanced Fluorescent Organic Light-Emitting Diodes from Direct Charge Trapping of Dopants in Emission Layer", ACS Applied Materials & Interfaces, Vol. 7(30), 16750−16759, 2015
⦁ "A Repeatable Epitaxial Lift-Off Process from a Single GaAs Substrate for Low-Cost and High-Efficiency III-V Solar Cells", Advanced Energy Materials, Vol. 4, 1400589, 2014
⦁ "Dopant-Free Hydrogenated Amorphous Silicon Thin-Film Solar Cells Using Molybdenum oxide and Lithium Fluoride", The Journal of Physical Chemistry C, Volume 117, pages 23459, 2013
⦁ "Doping-free silicon thin film solar cells using a vanadium pentoxide window layer and a LiF/Al back electrode", Applied Physics Letters, Volume 103, 073903, 2013
⦁ "Organic-inorganic hybrid thin-film solar cells using conducting polymer and Au-NPs", Applied Physics Letters, Volume 102, pages 183902, 2013
⦁ "Self-assembled monolayer as an interfacial modification material for highly efficient and air-stable inverted organic solar cells", Applied Physics Letters, Volume 102, pages 143303, 2013
⦁ "Highly efficient hybrid thin-film solar cells using a solution-processed hole-blocking layer", Physical Chemistry Chemical Physics, Volume 15, Pages 1788-1792, 2013
⦁ "Efficient Hydrogenated Amorphous Silicon Thin-Film Solar Cells using Zinc Oxide deposited by Atomic Layer Deposition as a Protective Interfacial Layer", The Journal of Physical Chemistry C, Vol 116, Issue 44, Pagess 23231-23235, 2012
⦁ "Direct growth of SnO2 nanowires on WOx thin film", Nanotechnology, Vol 23, pp 485702(6pp), 2012
⦁ "High Efficiency Inorganic/Organic Hybrid Tandem Solar Cells", Advanced Materials, Vol 24, 4523-4527, 2012
⦁ "Hierarchically textured LixMn2−yO4 thin films as positive electrodes for lithium-ion batteries", Journal of Power Sources, 206 (2012) 288– 294, Available online 28 January 2012
⦁ “Lateral Buckling Mechanics in Silicon Nanowires on Elastomeric Substrates”, Nano Letters, 9, 3214, 2009