Abstract
Different concentrations of Na were systematically introduced into CuInSe2 (CIS) photovoltaic solar cell absorber material on different substrates (SLG, Si02/SLG, 7059, alumina) to: 1) determine the resultant effects on device properties, junction formation, and material microstructure; and 2) determine the optimal range of Na concentrations in the CIS films per specific substrate. In general,finished devices show improved Voc, Jsc, and device efficiency, improved charge-collection efficiency and, possibly, increased grain size as a result of the coevaportion of 4 to 100 mg of Na2Se during film deposition. However, a dramatic devolution set in with the addition of 235 mg of Na2Se, and all the aforementioned parameters were either at, or worse than, their pre-Na-addition levels.Meanwhile, although the device microstructure improves with Na addition and, more importantly, the junction (as characterized by electron-beam-induced current) has become much more uniform and closer to the heteroface, all that reverses with the 'Na overdose.'
| Original language | American English |
|---|---|
| Number of pages | 10 |
| State | Published - 1998 |
| Event | National Center for Photovolatics Program Review Meeting - Denver, Colorado Duration: 8 Sep 1998 → 11 Sep 1998 |
Conference
| Conference | National Center for Photovolatics Program Review Meeting |
|---|---|
| City | Denver, Colorado |
| Period | 8/09/98 → 11/09/98 |
NREL Publication Number
- NREL/CP-520-25682
