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Spectrum-Dependent Spiro-OMeTAD Oxidization Mechanism in Perovskite Solar Cells
Abstract
We propose a spectrum-dependent mechanism for the oxidation of 2,2',7,7'-tetrakis(N,N-di-p-methoxyphenylamine)-9,9'-spirobifluorene (Spiro-OMeTAD) with bis(trifluoromethane)sulfonimide lithium salt (LiTFSI), which is commonly used in perovskite solar cells as the hole transport layer. The perovskite layer plays different roles in the Spiro-OMeTAD oxidization for various spectral ranges. The effect of oxidized Spiro-OMeTAD on the solar cell performance was observed and characterized. With the initial long-wavelength illumination (>450 nm), the charge recombination at the TiO2/Spiro-OMeTAD interface was increased due to the higher amount of the oxidized Spiro-OMeTAD. On the other hand, the increased conductivity of the Spiro-OMeTAD layer and enhanced charge transfer at the Au/Spiro-OMeTAD interface facilitated the solar cell performance.
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Kim, H.-S., Lee, C.-R., Im, J.-H., Lee, K.-B., Moehl, T., Marchioro, A., Moon, S.-J., Humphry-Baker, R., Yum, J.-H., Moser, J. E., et al. (2012) · Scientific Reports · doi:10.1038/srep00591 · Cited by 8,092
Cited by
Recent Progress on the Long‐Term Stability of Perovskite Solar Cells
Fu, Q., Tang, X., Huang, B., Hu, T., Tan, L., Chen, L., & Chen, Y. (2018) · Advanced Science · doi:10.1002/advs.201700387 · Cited by 454
Hawash, Z., Ono, L. K., & Qi, Y. (2018) · Advanced Materials Interfaces · doi:10.1002/admi.201700623 · Cited by 455
Unveiling the Role of tBP–LiTFSI Complexes in Perovskite Solar Cells
Wang, S., Huang, Z., Wang, X., Li, Y., Günther, M., Valenzuela, S., Parikh, P., Cabreros, A., Xiong, W., & Meng, Y. S. (2018) · Journal of the American Chemical Society · doi:10.1021/jacs.8b09809 · Cited by 292
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Metadata
- Authors
- Wang, S., Yuan, W., & Meng, Y. S.
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-10-27
- Volume
- 7
- Issue
- 44
- Pages
- 24791-24798
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W1781809422
- Cited by
- 217
- References
- 1
- FWCI
- 8.66
- Type
- journal article
- Language
- en
- Open access
- closed
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- Wang, S., Yuan, W., & Meng, Y. S. (2015). Spectrum-Dependent Spiro-OMeTAD Oxidization Mechanism in Perovskite Solar Cells. ACS Applied Materials & Interfaces. https://doi.org/10.1021/acsami.5b07703
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