Light-induced increase in the open-circuit voltage of thin-film heterogeneous silicon solar cells
Abstract
We observe a significant light-induced increase in open-circuit voltage, Voc, of solar cells whose intrinsic (i) layer consists of an amorphous and microcrystalline mixed phase. The increase depends on the i-layer thickness and light-soaking intensity. An increase of as large as 150 mV or 20% of the original Voc is observed. The original Voc is restored after subsequent thermal annealing. The possible mechanism for the Voc increase is discussed.
- Publication:
-
Applied Physics Letters
- Pub Date:
- December 2001
- DOI:
- 10.1063/1.1420778
- Bibcode:
- 2001ApPhL..79.3800L
- Keywords:
-
- 84.60.Jt;
- 61.72.Cc;
- 72.40.+w;
- Photoelectric conversion: solar cells and arrays;
- Kinetics of defect formation and annealing;
- Photoconduction and photovoltaic effects