Abstract
In this paper, we present an update and review on the progress made in the development of low-bandgap CuInSe2 (CIS) and wide-bandgap CuGaSe2 (CGS) solar cells. Our research project is a primarily concerned with the optimization of the bottom and top cells of the tandem solar cell. This past year, we established new record total-area efficiencies of 15.0% and 10.2% for CIS and surface-modified CGSsolar cells, respectively. These achievements were possible by modifying the growth process for CIS and CGS absorbers. We attempt to modify the surface region of the CGS absorber to be CIGS-like in composition. We also have designed a mechanical-stacked tandem solar cell where the 15% CIS cell serves as the bottom cell. The NREL-confirmed total-area efficiency for this tandem device is 15.31%.
| Original language | American English |
|---|---|
| Number of pages | 7 |
| State | Published - 2005 |
| Event | 31st IEEE Photovoltaics Specialists Conference and Exhibition - Lake Buena Vista, Florida Duration: 3 Jan 2005 → 7 Jan 2005 |
Conference
| Conference | 31st IEEE Photovoltaics Specialists Conference and Exhibition |
|---|---|
| City | Lake Buena Vista, Florida |
| Period | 3/01/05 → 7/01/05 |
NREL Publication Number
- NREL/CP-520-37411
Keywords
- absorbers
- CuGaSe2 (CGS)
- CuInSe2 (CIS)
- devices
- low-band gap
- PV
- surface-modified
- tandem solar cells
- total-area efficiency
- wide band gap