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어영주,이원하,김균환,안세진,조아라,곽지혜,윤경훈,문세연,정효림,김진혁,윤재호 한국물리학회 2014 Current Applied Physics Vol.14 No.10
Carbon-free CuInSe2 (CIS) thin film with a dense microstructure has been prepared using a novel nonvacuum based fabrication route. CuxSy and In2Se3 binary nanoparticles, approximately 10 nm in size, were synthesized by a low temperature colloidal process. The precursor film was deposited using the coating ink formulated with the binary nanoparticles and pyridine, and then annealed in the rapid thermal annealing (RTA) chamber at 540 C for 15 min under selenium (Se) atmosphere. Scanning electron micrographs, X-ray diffraction patterns and Raman spectra showed a phase pure carbon-free and dense CIS thin film was prepared in this method. A solar cell device fabricated using this CIS thin film showed the following photovoltaic characteristics: VOC ¼ 350 mV, JSC ¼ 24.72 mA cm2, FF ¼ 38.73% and h ¼ 3.36% under standard AM 1.5 condition.
어영주(Young Joo Eo),송수민(Soomin Song),이상민(Sang Min Lee),조아라(Ara Cho),안승규(Seung Kyu Ahn),안세진(SeJin Ahn),김기환(Kihwan Kim),윤재호(Jae Ho Yun),정인영(In Young Jeong),유진수(Jin Soo Yoo),조준식(Jun Sik Cho),박주형(Joo Hyung 한국신재생에너지학회 2021 한국신재생에너지학회 학술대회논문집 Vol.2021 No.7
유연 박막 태양전지 모듈은 유리 기판을 봉지재로 사용하는 기존의 결정질 실리콘 태양전지 모듈과는 달리 플라스틱 소재를 봉지재로 사용한다. 플라스틱 소재는 유리 기판에 비해 기밀 및 수밀 특성이 나쁘기 때문에 수분 침투에 의한 태양전지 모듈의 열화가 쉽게 발생한다. 그러나, 유연 박막 태양전지 모듈의 내열 내습 시험(Damp heat test)에 의한 고장 유형(Failure Mode)의 분석은 연구가 미흡한 실정이다. 본 연구에서는 먼저, 기존의 상용 유연 박막 태양 전지 모듈의 장기 안정성을 내열 내습 시험으로 평가하였다. 이후, 이를 바탕으로 실제 유연 박막 태양전지 모듈을 제작하여 내열 내습 시험을 진행함으로써 고장 유형을 분석하고 개선 방안을 도출하였다.
직접 용액 코팅법에 의해 제조한 CuInSe<sub>2</sub> 에 잔존하는 탄소 불순물층 형성에 관한 연구
안세진,어영주,곽지혜,윤경훈,조아라,Ahn, SeJin,Rehan, Shanza,Eo, Young-Joo,Gwak, Jihye,Yoon, Kyunghoon,Cho, Ara 한국태양광발전학회 2014 Current Photovoltaic Research Vol.2 No.1
Formation mechanism of residual carbon layer, frequently observed in the $CuInSe_2$ (CIS) thin film prepared by direct solution coating routes, was investigated in order to find a way to eliminate it. As a model system, a methanol solution with dissolved Cu and In salts, whose viscosity was adjusted by adding ethylcellulose (EC), was chosen. It was found that a double layer, a top metal ion-derived film and bottom EC-derived layer, formed during an air drying step presumably due to different solubility between metal salts and EC in methanol. Consequently, the top metal ion-derived film acts as a barrier layer inhibiting further thermal decomposition of underlying EC, resulting a formation of bottom carbon residue layer.
레이저 가공에 의한 비정질 실리콘 박막 태양전지 모듈 제조
이해석(Lee, Hae-Seok),어영주(Eo, Young-Joo),이헌민(Lee, Heon-Min),이돈희(Lee, Don-Hee) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.11
Recently, we have developed p-i-n a-Si:H single junction thin film solar cells with RF (13.56MHz) plasma enhanced chemical vapor deposition (PECVD) system, and also successfully fabricated the mini modules (>300cm²), using the laser patterning technique to form an integrated series connection. The efficiency of a mini module was 7.4% (Area=305cm², Isc=0.25A, Voc=14.74V, FF=62%). To fabricate large area modules, it is important to optimise the integrated series connection, without damaging the cell. We have newly installed the laser patterning equipment that consists of two different lasers, SHG-YVO₄ ({lambda}=0.532{mu}m) and YAG ({lambda}=1.064{mu}m). The mini-modules are formed through several scribed lines such as pattern-l (front TCO), pattern-2 (PV layers) and pattern-3 (BR/back contact). However, in the case of pattern-3, a high-energy part of laser shot damaged the textured surface of the front TCO, so that the resistance between the each cells decreases due to an incomplete isolation. In this study, the re-deposition of SnOx from the front TCO, Zn (BR layer) and Al (back contact) on the sidewalls of pattern-3 scribed lines was observed. Moreover, re-crystallization of a-Si:H layers due to thermal damage by laser patterning was evaluated. These cause an increase of a leakage current, result in a low efficiency of module. To optimize a-Si:H single junction thin film modules, a laser beam profile was changed, and its effect on isolation of scribed lines is discussed in this paper.