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Charge Transport and Recombination in Perovskite (CH3NH3)PbI3 Sensitized TiO2 Solar Cells
Abstract
We report on the effect of TiO 2 film thickness on the charge transport, recombination, and device characteristics of perovskite (CH 3 NH 3 )PbI 3 sensitized solar cells using iodide-based electrolytes. (CH 3 NH 3 )PbI 3 is relatively stable in a nonpolar solvent (e.g., ethyl acetate) with a low iodide concentration (e.g., 80 mM). Frequency-resolved modulated photocurrent/photovoltage spectroscopies show that increasing TiO 2 film thickness from 1.8 to 8.3 μm has little effect on transport but increases recombination by more than 10-fold, reducing the electron diffusion length from 16.9 to 5.5 μm, which can be explained by the higher degree of iodide depletion within the TiO 2 pores for thicker films. The changes of the charge-collection and light-absorption properties of (CH 3 NH 3 )PbI 3 sensitized cells with varying TiO 2 film thickness strongly affect the photocurrent density, photovoltage, fill factor, and solar conversion efficiency. Developing alternative, compatible redox electrolytes is important for (CH 3 NH 3 )PbI 3 or similar perovskites to be used for potential photoelectrochemical applications.
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Cites
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
Causes and Solutions of Recombination in Perovskite Solar Cells
Chen, J., & Park, N. (2019) · Advanced Materials · doi:10.1002/adma.201803019 · Cited by 733
Ambipolar solution-processed hybrid perovskite phototransistors
Li, F., Ma, C., Wang, H., Hu, W., Yu, W., Sheikh, A. D., & Wu, T. (2015) · Nature Communications · doi:10.1038/ncomms9238 · Cited by 629
Tress, W. (2017) · Advanced Energy Materials · doi:10.1002/aenm.201602358 · Cited by 601
Zhao, Y., & Zhu, K. (2014) · The Journal of Physical Chemistry C · doi:10.1021/jp502696w · Cited by 555
Self-citationEfficient Luminescence from Perovskite Quantum Dot Solids
Kim, Y., Yassitepe, E., Voznyy, O., Comin, R., Walters, G., Gong, X., Kanjanaboos, P., Nogueira, A. F., & Sargent, E. H. (2015) · ACS Applied Materials & Interfaces · doi:10.1021/acsami.5b09084 · Cited by 555
Metadata
- Authors
- Zhao, Y., & Zhu, K.
- Venue
- The Journal of Physical Chemistry Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2013-08-13
- Volume
- 4
- Issue
- 17
- Pages
- 2880-2884
- ISSN
- 1948-7185 (ISSN-L)
- OpenAlex
- W2083045086
- Cited by
- 312
- References
- 1
- FWCI
- 27.56
- Type
- journal article
- Language
- en
- Open access
- closed
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- Zhao, Y., & Zhu, K. (2013). Charge Transport and Recombination in Perovskite (CH3NH3)PbI3 Sensitized TiO2 Solar Cells. The Journal of Physical Chemistry Letters. https://doi.org/10.1021/jz401527q
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