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a-Si 태양전지 모듈의 hotspot에 의한 열화현상 연구
윤나리(Yoon Na-Ri),정태희(Jung Tae-Hee),민용기(Min Yong-Ki),강기환(Kang Ki-Hwan),안형근(Ahn Hyeung-Keun),한득영(Han Deuk-Young) 한국태양에너지학회 2011 한국태양에너지학회 학술대회논문집 Vol.2011 No.4
There are some degradation factors for amorphous silicon solar cells. Light inducing is one of the factor that explained by Staebler-Wronski effect. Also, hotspot heating could be the reason that makes amorphous silicon solar cell degrade. Hotspot heating is occurred when a solar cell is shaded so this work is investigated into two types of shading condition and how these affect to solar cell differently. Reduced irradiance for whole cell and partially shaded as 0(W/㎡) while the other part of cell is soaking as 1000(W/㎡) of irradiance are two conditions that are experimented. The two types of shading show different characteristics of degradations. The result shows that partially shaded cell dropped maximum power less and slower. Also sudden drop points have shown that should be concerned to decide the number of cells for a string. Otherwise, the current through a shaded cell might flow more than cell's capability. It makes cell and module damaged. This work would help to manufacture modules.