Metastable Changes to the Temperature Coefficients of Thin-Film Photovoltaic Modules
Transient changes in the performance of thin-film modules with light exposure are a well-known and widely reported phenomenon. These changes are often the result of reversible metastabilities rather than irreversible changes. Here we consider how these metastable changes affect the temperature dependence of photovoltaic performance. We find that in CIGS modules exhibiting a metastable increase in performance with light exposure, the light exposure also induces an increase in the magnitude of the temperature coefficient. It is important to understand such changes when characterizing temperature coefficients and when analyzing the outdoor performance of newly installed modules.
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- Conference: Presented at the 40th IEEE Photovoltaic Specialists Conference, 8-13 June 2014, Denver, Colorado
- Research Org:
- National Renewable Energy Laboratory (NREL), Golden, CO.
- Sponsoring Org:
- USDOE Office of Energy Efficiency and Renewable Energy Solar Energy Technologies Office
- Country of Publication:
- United States
- 14 SOLAR ENERGY; 36 MATERIALS SCIENCE CIGS; PHOTOVOLTAIC; METASTABILITY; TRANSIENT; LIGHT-SOAK; TEMPERATURE COEFFICIENT; Solar Energy - Photovoltaics
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