Transient Response of Cadmium Telluride Modules to Light Exposure

C. Deline, J. Del Cueto, D. S. Albin, C. Petersen, L. Tyler, G. TamizhMani

Research output: Contribution to conferencePaperpeer-review

12 Scopus Citations


Commercial cadmium telluride (CdTe) photovoltaic (PV) modules from three different manufacturers were monitored for performance changes during indoor and outdoor light-exposure. Short-term transients in V oc were recorded on some modules, with characteristic times of ∼1.1 hours. Outdoor performance data shows a similar drop in V oc after early morning light exposure. Preliminary analysis of FF changes show light-induced changes on multiple time scales, including a long time scale. Multiple methods of measuring βV oc resulted in a range of values on the same CdTe PV module between -0.25%/C and -0.4%/C, possibly due to concurrent light-induced V oc transients and temperature changes. This paper highlights the need for rapid performance measurement of PV samples following light exposure and the possibility of incorrect results when using outdoor light exposure to collect values of βV oc for CdTe modules.

Original languageAmerican English
Number of pages6
StatePublished - 2011
Event37th IEEE Photovoltaic Specialists Conference, PVSC 2011 - Seattle, WA, United States
Duration: 19 Jun 201124 Jun 2011


Conference37th IEEE Photovoltaic Specialists Conference, PVSC 2011
Country/TerritoryUnited States
CitySeattle, WA

Bibliographical note

See NREL/CP-5200-50744 for preprint

NREL Publication Number

  • NREL/CP-5200-55707


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