DocumentCode :
3377061
Title :
Properties of encapsulated CIGS cells in 85°C/85%RH
Author :
Olsen, Larry C. ; Gross, Mark E. ; Kundu, Sambhu N. ; Shafarman, William N.
Author_Institution :
Pacific Northwest National Laboratory, Richland, WA 99354, USA
fYear :
2008
fDate :
11-16 May 2008
Firstpage :
1
Lastpage :
3
Abstract :
This paper concerns studies of encapsulated cells subjected to an environment of 85°C and 85%RH (85/85). Cells are encapsulated with PNNL multi-layer coatings (referred to as PML coatings) utilizing alternating layers of Al2O3, and an advanced polymer. The new polymer has been determined to withstand the 85/85 environment. Two types of cells were used for these studies, namely, SSI mini-modules (which are actually CIGSS devices) and CIGS cells provided by the Institute of Energy Conversion (IEC). Cells were coated and stressed at 85/85 in an environmental chamber. Current-voltage characteristics were acquired before and after coating, and periodically after being subjected to the 85/85 environment. Whereas coated SSI modules were determined to last 1000 hours when stressed at 60°C/90%RH without degradation, the efficiency of these modules degrade to a level of 60% of the beginning-of-life value when stressed at 85/85. Encapsulated IEC cells, however, have exhibited extraordinary results. The efficiency of several encapsulated cells did not decrease for 1500 hours in an 85°C/85%RH environment. This results establishes a benchmark for stressed, encapsulated CIGS cells.
Keywords :
Building integrated photovoltaics; Coatings; Current-voltage characteristics; Degradation; Energy conversion; Humidity; IEC standards; Moisture; Polymer films; Substrates;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Photovoltaic Specialists Conference, 2008. PVSC '08. 33rd IEEE
Conference_Location :
San Diego, CA, USA
ISSN :
0160-8371
Print_ISBN :
978-1-4244-1640-0
Electronic_ISBN :
0160-8371
Type :
conf
DOI :
10.1109/PVSC.2008.4922498
Filename :
4922498
Link To Document :
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