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(Ga,Al)이 도핑된 ZnO를 투명전극으로 가진 Cu(In,Ga)Se<sub>2</sub> 태양전지에 수분이 미치는 영향
양소현,배진아,송유진,전찬욱,Yang, So Hyun,Bae, Jin A,Song, Yu Jin,Jeon, Chan Wook 한국태양광발전학회 2017 Current Photovoltaic Research Vol.5 No.4
We fabricated two different transparent conducting oxide thin films of ZnO doped with Ga ($Ga_2O_3$ 0.9 wt%) as well as Al ($Al_2O_3$ 2.1 wt%) (GAZO) and ZnO doped only with Al ($Al_2O_3$ 3 wt%) (AZO). It was investigated how it affects the moisture resistance of the transparent electrode. In addition, $Cu(In,Ga)Se_2$ thin film solar cells with two transparent oxides as front electrodes were fabricated, and the correlation between humidity resistance of transparent electrodes and device performance of solar cells was examined. When both transparent electrodes were exposed to high temperature distilled water, they showed a rapid increase in sheet resistance and a decrease in the fill factor of the solar cell. However, AZO showed a drastic decrease in efficiency at the beginning of exposure, while GAZO showed that the deterioration of efficiency occurred over a long period of time and that the long term moisture resistance of GAZO was better.
(Ga,Al) : ZnO 투명전극층의 두께에 따른 CIGS 박막 태양전지의 성능 변화 연구
차정화(Jung-Hwa Cha),전찬욱(Chan-Wook Jeon) 한국태양광발전학회 2017 Current Photovoltaic Research Vol.5 No.1
In this paper, (Ga,Al):ZnO layers were deposited by sputtering to evaluate the device performance according to the thickness of the layer. As the thickness increased, low transmittance was observed, but the electrical resistance was improved. On the other hand, the highest efficiency was recorded at 400 ㎚ device than a 500 ㎚ of it. Therefore, since the critical thickness exists, it is necessary to set an adequate TCO layer thickness in consideration of the characteristics of the underlying film and the device.