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용액 공정으로 만든 Cu(In,Ga)S<sub>2</sub> 박막태양전지의 전기적 특성
김지은,민병권,김동욱,Kim, Ji Eun,Min, Byoung Koun,Kim, Dong-Wook 한국태양광발전학회 2014 Current Photovoltaic Research Vol.2 No.2
We investigated current-voltage (I-V) and capacitance (C)-V characteristics of solution-processed thin film solar cells, consisting of $Cu(In,Ga)S_2$ and $CuInS_2$ stacked absorber layers. The ideality factors, extracted from the temperature-dependent I-V curves, showed that the tunneling-mediated interface recombination was dominant in the cells. Rapid increase of both series- and shunt-resistance at low temperatures would limit the performance of the cells, requiring further optimization. The C-V data revealed that the carrier concentration of the $CuInS_2$ layer was about 10 times larger than that of the $Cu(In,Ga)S_2$ layer. All these results could help us to find strategies to improve the efficiency of the solution-processed thin film solar cells.
용액 공정으로 만든 Cu(In,Ga)S₂ 박막태양전지의 전기적 특성
김지은(Ji Eun Kim),민병권(Byoung Koun Min),김동욱(Dong-Wook Kim) 한국태양광발전학회 2014 Current Photovoltaic Research Vol.2 No.2
We investigated current-voltage (I-V) and capacitance (C)-V characteristics of solution-processed thin film solar cells, consisting of Cu(In,Ga)S₂ and CuInS₂ stacked absorber layers. The ideality factors, extracted from the temperature-dependent I-V curves, showed that the tunneling-mediated interface recombination was dominant in the cells. Rapid increase of both series- and shuntresistance at low temperatures would limit the performance of the cells, requiring further optimization. The C-V data revealed that the carrier concentration of the CuInS₂ layer was about 10 times larger than that of the Cu(In,Ga)S₂ layer. All these results could help us to find strategies to improve the efficiency of the solution-processed thin film solar cells.
황윤정 ( Yun Jeong Hwang ),민병권 ( Byoung Koun Min ),정광덕 ( Kwang Deog Jung ) 한국공업화학회 2013 공업화학전망 Vol.16 No.4
인공광합성은 에너지 및 화학자원을 물과 이산화탄소로부터 생산하는 순환형 에너지?화학자원 생산기술이라고 할 수 있다. 아직은 기초수준단계의 기술이나 선진국에서는 막대한 연구비를 투자하는 미래의 신성장동력원이될 수 있는 기술로 기대되고 있다. 이 분야는 유기화학, 무기화학, 물리화학, 전기화학, 생화학, 바이오공학, 재료공학, 화학공학등 다양한 분야를 포괄하는 기술이다. 여기서는 전지시스템 및 입자시스템을 기반으로 한 인공광합성기술의 최근 동향을 소개하였다.
태양광 활용 광전기화학적 인공광합성 일산화탄소생산의 경제성평가
김진현(Jin Hyun Kim),민병권(Byoung Koun Min),조용성(Yongsung Cho) 한국신재생에너지학회 2017 신재생에너지 Vol.13 No.1
Because of the widespread demand for a low-carbon society, the necessity of renewable energy is one of the most promising solutions for the future. In keeping pace with other environmental-friendly technologies, artificial photosynthesis is one of the latest technologies that produces chemical fuel and various energy sources without pollution. Because artificial photosynthesis uses carbon dioxide to produce chemical fuels, it has been evaluated as a promising core technology that may also provide a solution for climate change. In this study, artificial photosynthesis with a photoelectrochemical cell was designed and economic analysis on carbon monoxide and oxygen production was performed. In addition, a sensitivity evaluation was performed on the change in discount rate, benefit, and cost. The results showed that with a 10% efficiency rate and 5% discount rate on an artificial photosynthesis device, the artificial photosynthesis device generates 1.414 trillion Won of NPV. Therefore, the artificial photosynthesis device has high economic potential. As the efficiency of the device was changed to 10%, 13%, and 15%, the amount of carbon dioxide used for the reaction increased to as much as 24,309ton, 29,200ton and 36,500ton, respectively. This indicates that the artificial photosynthesis device also has a carbon dioxide reduction effect.
레이져를 이용한 도핑 특성과 선택적 도핑 에미터 실리콘 태양전지의 제작
박성은(Sungeun Park),박효민(Hyomin Park),남정규(Junggyu Nam),양정엽(JungYup Yang),이동호(Dongho Lee),민병권(Byoung Koun Min),김경남(Kyung Nam Kim),박세진(Se Jin Park),이해석(Hae-Seok Lee),김동환(Donghwan Kim),강윤묵(Yoonmook Kang),김동 한국태양광발전학회 2016 Current Photovoltaic Research Vol.4 No.2
Laser-doped selective emitter process requires dopant source deposition, spin-on-glass, and is able to form selective emitter through SiNx layer by laser irradiation on desired locations. However, after laser doping process, the remaining dopant layer needs to be washed out. Laser-induced melting of pre-deposited impurity doping is a precise selective doping method minimizing addition of process steps. In this study, we introduce a novel scheme for fabricating highly efficient selective emitter solar cell by laser doping. During this process, laser induced damage induces front contact destabilization due to the hindrance of silver nucleation even though laser doping has a potential of commercialization with simple process concept. When the laser induced damage is effectively removed using solution etch back process, the disadvantage of laser doping was effectively removed. The devices fabricated using laser doping scheme power conversion efficiency was significantly improved about 1% abs. after removal the laser damages.