자외선 조사량에 따른 태양전지 모듈 봉지재의 특성 분석

• Published in: Current Photovoltaic Research Vol. 6; no. 3; pp. 81 - 85
• Main Authors: 이송은(Song-Eun Lee), 배준학(Joon-Hak Bae), 신재원(Jae-Won Shin), 전찬욱(Chan-Wook Jeon)
• Format: Journal Article
• Language: Korean
• Published: 한국태양광발전학회 2018
• Subjects: 자연과학일반; EVA; UV; Yellowness; Module; Gel content
• ISSN: 2288-3274; 2508-125X

The photovoltaic modules installed in the actual field are affected by various external environments and the electrical performance output value is generally lowered compared to initial output value. The most of photovoltaic modules consists of low iron glass, encapsulant (EVA), back sheet, frame and junction box assembly based on the solar cells. In this paper, the characteristics of encapsulant which is an important constituent material of photovoltaic module were verified by maximum power determination, electro luminescence images, yellowness index measurement, and gel content measurement after ultraviolet (UV) irradiation exposure. The most commonly installed 72 cells crystalline photovoltaic modules were tested after various UV exposure of 0, 15, 30, and $60kWh/m^2$ and compared with the reference module. After UV exposure of $15kWh/m^2$, which is the current international test condition, a small amount of change was observed in yellowness index and electroluminescence, while a gell content rapidly increased. At a cumulative dose of $60kWh/m^2$, which will be a new international test condition in the near future, however, the yellowness index increased sharply and showed the greatest output power drop.