First-principles study of roles of Cu and Cl in polycrystalline CdTe
Journal Article
·
· Journal of Applied Physics
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Soochow Univ., Suzhou (China)
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Beijing Computational Science Research Center, Beijing (China)
In this study, Cu and Cl treatments are important processes to achieve high efficiency polycrystalline cadmium telluride (CdTe) solar cells, thus it will be beneficial to understand the roles they play in both bulk CdTe and CdTe grain boundaries (GBs). Using first-principles calculations, we systematically study Cu and Cl-related defects in bulk CdTe. We find that Cl has only a limited effect on improving p-type doping and too much Cl can induce deep traps in bulk CdTe, whereas Cu can enhance ptype doping of bulk CdTe. In the presence of GBs, we find that, in general, Cl and Cu will prefer to stay at GBs, especially for those with Te-Te wrong bonds, in agreement with experimental observations.
- Research Organization:
- Arizona State Univ., Tempe, AZ (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- EE0006344; AC36-08GO28308
- OSTI ID:
- 1237018
- Alternate ID(s):
- OSTI ID: 1421153
- Report Number(s):
- DOE-ASU-0006344-8; JAPIAU
- Journal Information:
- Journal of Applied Physics, Vol. 119, Issue 4; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 43 works
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