Zirconium oxide surface passivation of crystalline silicon
Abstract
This letter reports effective passivation of crystalline silicon (c-Si) surfaces by thermal atomic layer deposited zirconium oxide (ZrOx). The optimum layer thickness and activation annealing conditions are determined to be 20 nm and 300 °C for 20 min. Cross-sectional transmission electron microscopy imaging shows an approximately 1.6 nm thick SiOx interfacial layer underneath an 18 nm ZrOx layer, consistent with ellipsometry measurements (~20 nm). Capacitance-voltage measurements show that the annealed ZrOx film features a low interface defect density of 1.0 × 1011cm-2eV-1 and a low negative film charge density of -6 × 1010cm-2. Effective lifetimes of 673 μs and 1.1 ms are achieved on p-type and n-type 1 Ω cm undiffused c-Si wafers, respectively, corresponding to an implied open circuit voltage above 720 mV in both cases. The results demonstrate that surface passivation quality provided by ALD ZrOx is consistent with the requirements of high efficiency silicon solar cells.
- Authors:
-
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States); Australian National Univ., Canberra, ACT (Australia)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
- Australian National Univ., Canberra, ACT (Australia)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1477296
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 112; Journal Issue: 20; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Wan, Yimao, Bullock, James, Hettick, Mark, Xu, Zhaoran, Yan, Di, Peng, Jun, Javey, Ali, and Cuevas, Andres. Zirconium oxide surface passivation of crystalline silicon. United States: N. p., 2018.
Web. doi:10.1063/1.5032226.
Wan, Yimao, Bullock, James, Hettick, Mark, Xu, Zhaoran, Yan, Di, Peng, Jun, Javey, Ali, & Cuevas, Andres. Zirconium oxide surface passivation of crystalline silicon. United States. https://doi.org/10.1063/1.5032226
Wan, Yimao, Bullock, James, Hettick, Mark, Xu, Zhaoran, Yan, Di, Peng, Jun, Javey, Ali, and Cuevas, Andres. Fri .
"Zirconium oxide surface passivation of crystalline silicon". United States. https://doi.org/10.1063/1.5032226. https://www.osti.gov/servlets/purl/1477296.
@article{osti_1477296,
title = {Zirconium oxide surface passivation of crystalline silicon},
author = {Wan, Yimao and Bullock, James and Hettick, Mark and Xu, Zhaoran and Yan, Di and Peng, Jun and Javey, Ali and Cuevas, Andres},
abstractNote = {This letter reports effective passivation of crystalline silicon (c-Si) surfaces by thermal atomic layer deposited zirconium oxide (ZrOx). The optimum layer thickness and activation annealing conditions are determined to be 20 nm and 300 °C for 20 min. Cross-sectional transmission electron microscopy imaging shows an approximately 1.6 nm thick SiOx interfacial layer underneath an 18 nm ZrOx layer, consistent with ellipsometry measurements (~20 nm). Capacitance-voltage measurements show that the annealed ZrOx film features a low interface defect density of 1.0 × 1011cm-2eV-1 and a low negative film charge density of -6 × 1010cm-2. Effective lifetimes of 673 μs and 1.1 ms are achieved on p-type and n-type 1 Ω cm undiffused c-Si wafers, respectively, corresponding to an implied open circuit voltage above 720 mV in both cases. The results demonstrate that surface passivation quality provided by ALD ZrOx is consistent with the requirements of high efficiency silicon solar cells.},
doi = {10.1063/1.5032226},
journal = {Applied Physics Letters},
number = 20,
volume = 112,
place = {United States},
year = {2018},
month = {5}
}
Web of Science
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