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유무연 용융도금 리본에 따른 결정질 실리콘 태양전지 모듈 열화거동
김주희,김아영,박노창,하정원,이상권,홍원식,Kim, Ju-Hee,Kim, A Yong,Park, Nochang,Ha, Jeong Won,Lee, Sang Guon,Hong, Won Sik 대한용접접합학회 2014 대한용접·접합학회지 Vol.32 No.6
Usage of heavy metal element (Pb, Hg and Cd etc.) in electronic devices have been restricted due to the environmental banning of the European Union, such as WEEE and RoHS. Therefore, it is needed to develop the Pb-free solder plated ribbon in photovoltaic (PV) module. This study described that degradation characteristics of PV module under damp heat (DH, $85^{\circ}C$ and 85% R.H.) condition test for 1,000 h. Solar cell ribbons were utilized to hot dipping plate with Pb-free solder alloys. Two types of Pb-free solder plated ribbons, Sn-3.0Ag-0.5Cu (SAC305) and Sn-48Bi-2Ag, and an electroless Sn-40Pb solder hot dipping plated ribbon as a reference sample were prepared to evaluate degradation characteristics. To detect the degradation of PV module with the eutectic and Pb-free solder plated ribbons, I-V curve, electro-luminescence (EL) and cross-sectional SEM analysis were carried out. DH test results show that the reason of maximum power (Pm) drop was mainly due to the decrease fill factor (FF). It was attributed to the crack or oxidation of interface between the cell and the ribbon. Among PV modules with the eutectic and Pb-free solder plated ribbon, the PV module with SAC305 ribbon relatively showed higher stability after DH test than the case of PV module with Sn-40Pb and Sn-48Bi-2Ag solder plated ribbons.
유연 박막 태양전지에 적용하기 위한 전기 전도성 접착제의 열 안정성 평가
김다정(Kim Dajeong),김진철(Kim Jincheol),박노창(Park Nochang) 한국태양에너지학회 2021 한국태양에너지학회 논문집 Vol.41 No.6
In recent years, pre-cut thin strips of solar cells have been assembled into gapless solar modules in a shingle-like manner, one on top of the other. This technique is called shingling technology, and is gaining increasing market attention. In particular, efficient packing that leaves no space between cells is preferred since it yields an economic gain. One of the biggest market opportunities is the use of electrically conductive adhesives (ECA), which act as a glue between pre-cut cells. Although there are many studies on ECA with a silicon solar cell area, research needs to be expanded in the area of a flexible solar cell that is more sensitive to heat stress. This study explores two types of silver-based ECA materials. The curing time varied from 30 to 60 s, and the curing temperature from 130 to 170°C. The assembled flexible solar cells were evaluated using temperature cycling tests.