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Title: 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.
Authors:
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Publication Date:
OSTI Identifier:
1136576
Report Number(s):
NREL/CP-5J00-61264
DOE Contract Number:
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
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
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE CIGS; PHOTOVOLTAIC; METASTABILITY; TRANSIENT; LIGHT-SOAK; TEMPERATURE COEFFICIENT; Solar Energy - Photovoltaics