Stabilization of High Efficiency CdTe Photovoltaic Modules in Controlled Indoor Light Soaking

Research output: Contribution to conferencePaper

Abstract

The performance and stabilization of large-area, high-efficiency 9%, CdTe photovoltaic (PV) modules maintained under controlled light-soaking nominally at 800 Watts/m2 irradiance and 65?C module temperature are investigated. Degradation of module performance occurs predominantly in the first few hundred hours of exposure under these conditions; these symptoms included losses in fill factor (FF),open-circuit voltage (Voc), and short-circuit current (Isc), which amount to between 7% and 15% total loss in performance. Higher stabilized performance was achieved with lower copper content in the back contact. Transient effects in module Voc and Isc were observed, suggesting partial annealing thereof when stored under low-light levels. Performance changes are analyzed, aided by monitoring thecurrent-voltage characteristics in situ during exposure.
Original languageAmerican English
Number of pages7
StatePublished - 2003
EventNational Center for Photovoltaics (NCPV) and Solar Program Review Meeting - Denver, Colorado
Duration: 24 Mar 200326 Mar 2003

Conference

ConferenceNational Center for Photovoltaics (NCPV) and Solar Program Review Meeting
CityDenver, Colorado
Period24/03/0326/03/03

NREL Publication Number

  • NREL/CP-520-33543

Keywords

  • cadmium telluride (CdTe) photovoltaic solar cells modules
  • CdTe
  • copper migration
  • PV module
  • stress testing

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