Abstract
The efficiency of Cu(In,Ga)Se2 (CIGS) solar cells is enhanced when Na is incorporated in the CIGS absorber layer. This work examines Na incorporation in CIGS utilizing Na-doped Mo sputtered from targets made with sodium molybdate-doped (MONA) powder. Mo:Na films with varying thicknesses were sputtered onto Mo-coated borosilicate glass (BSG) or stainless steel substrates for CIGS solar cells. Byuse of this technique, the Na content of CIGS can be varied from near-zero to higher than that obtained from a soda-lime glass (SLG) substrate. Targets and deposition conditions are described. The doped Mo films are analyzed, and the resulting devices are compared to devices fabricated on Mo-coated SLG as well as Mo-coated BSG with NaF. Completed devices utilizing MONA exceeded 15.7% efficiencywithout anti-reflective coating, which was consistently higher than devices prepared with the NaF precursor. Strategies for minimizing adhesion difficulties are presented.
| Original language | American English |
|---|---|
| Number of pages | 8 |
| State | Published - 2011 |
| Event | 37th IEEE Photovoltaic Specialists Conference (PVSC 37) - Seattle, Washington Duration: 19 Jun 2011 → 24 Jun 2011 |
Conference
| Conference | 37th IEEE Photovoltaic Specialists Conference (PVSC 37) |
|---|---|
| City | Seattle, Washington |
| Period | 19/06/11 → 24/06/11 |
NREL Publication Number
- NREL/CP-5200-50722
Keywords
- CIGS
- PV
- sodium incorporation
- solar cells