Degradation of Backsheets for Crystalline Photovoltaic Modules under Damp Heat Test

Dajung Kim; Namsu Kim; Won-Sik Hong; Hanjun Kang; Kyuwan Lee; Chulmin Oh

doi:10.7849/ksnre.2016.9.12.3.36

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자료유형: 학술저널

저자정보: Dajung Kim (Korea Electronics Technology Institute) Namsu Kim (Konkuk University) Won-Sik Hong (Korea Electronics Technology Institute) Hanjun Kang (Youlchon Chemical Co) Kyuwan Lee (Youlchon Chemical Co) Chulmin Oh (Korea Electronics Technology Institute)

저널정보: 한국신재생에너지학회 신·재생에너지 신재생에너지 제12권 제3호(통권 제48호)

발행연도: 2016.9

수록면: 36 - 43 (8page)

DOI: 10.7849/ksnre.2016.9.12.3.36

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The reliability of crystalline silicon photovoltaic (PV) modules is determined not only by the efficiency loss of the silicon cells but also by the degradation of other components (ethyl vinyl acetate, ribbon, glass, and backsheet). Among these components, the backsheet provides electrical insulation and physical support, and acts as a barrier against moisture and weathering of the PV module. We investigated the degradation of different types of backsheets under damp heat conditions [95°C/85% relative humidity (R.H), 85°C/85% R.H]. During the damp heat treatment, tensile tests were carried out to investigate the mechanical degradation of the backsheets. The molecular weight of the polyethylene terephthalate (PET) in the backsheets was measured by gel permeation chromatography (GPC) to understand the intrinsic mechanism of degradation. After damp heat test, mechanical degradation of backsheet occurred significantly beyond passing the specified molecular weight region of PET film in backsheet materials. By finding the correlation between tensile strength and the molecular weight of the backsheets, our results make it possible to improve the reliability of backsheets.

#Backsheet #PET Degradation #Tensile strength #GPC #Molecular weight

참고문헌 (30)

참고문헌 신청

[학술지(정기간행물)] - D. L. King / 2000 / Photovoltaic Module Performance and Durability Following Long-Term Field Exposure / Prog. Photovoltaics 8 : 241 ~

[학술지(정기간행물)] - I. V. Fisher / 2003 / Factors affecting the stability of CdTe/CdS solar cells deduced from stress tests at elevated temperature / Adv. Funct. Mater 13 : 289 ~

[학술대회논문] - M. A. Cluintana / 2002 / Commonly observed degradation in field-aged photovoltaic modules / Photovoltaic Specialists Conference (PVSC), 29th IEEE : 1436 ~

[학술지(정기간행물)] - D. Wu / 2000 / Degradation of interfacial adhesion strength within photovoltaic mini-modules during damp-heat exposure / Prog. Photovoltaics 22 : 796 ~ 809

[학술대회논문] - W. Gambogi / 2011 / The Role of Backsheet in Photovoltaic Module Performance and Durability / 26th European Photovoltaic Solar Energy Conference and Exhibition (PVSEC) : 3325 ~ 3328

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