Abstract
The presence of oxygen during close-spaced sublimation (CSS) of CdTe has been previously reported to be essential for high-efficiency CdS/CdTe solar cells because it increases the acceptor density in the absorber. We find that the presence of oxygen during CSS increases the nucleation site density of CdTe, thus decreasing pinhole density and grain size. Photoluminescence showed that oxygendecreases material quality in the bulk of the CdTe film, but positively impacts the critical CdS/CdTe interface. Through device characterization we were unable to verify an increase in acceptor density with increased oxygen. These results, along with the achievement of high-efficiency cells (13% AM1.5) without the use of oxygen, led us to conclude that the use of oxygen during CSS deposition ofCdTe can be useful but is not essential.
| Original language | American English |
|---|---|
| Pages | 777-780 |
| Number of pages | 4 |
| DOIs | |
| State | Published - 1996 |
| Event | Twenty Fifth IEEE Photovoltaic Specialists Conference - Washington, D.C. Duration: 13 May 1996 → 17 May 1996 |
Conference
| Conference | Twenty Fifth IEEE Photovoltaic Specialists Conference |
|---|---|
| City | Washington, D.C. |
| Period | 13/05/96 → 17/05/96 |
NREL Publication Number
- NREL/CP-22400