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Comparison of Recombination Dynamics in CH3NH3PbBr3 and CH3NH3PbI3 Perovskite Films: Influence of Exciton Binding Energy
Abstract
Understanding carrier recombination in semiconductors is a critical component when developing practical applications. Here we measure and compare the monomolecular, bimolecular, and trimolecular (Auger) recombination rate constants of CH3NH3PbBr3 and CH3NH3PbI3. The monomolecular and bimolecular recombination rate constants for both samples are limited by trap-assisted recombination. The bimolecular recombination rate constant for CH3NH3PbBr3 is ∼3.3 times larger than that for CH3NH3PbI3 and both are in line with that found for radiative recombination in other direct-gap semiconductors. The Auger recombination rate constant is 4 times larger in lead-bromide-based perovskite compared with lead-iodide-based perovskite and does not follow the reduced Auger rate when the bandgap increases. The increased Auger recombination rate, which is enhanced by Coulomb interactions, can be ascribed to the larger exciton binding energy, ∼40 meV, in CH3NH3PbBr3 compared with ∼13 meV in CH3NH3PbI3.
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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
Lead halide perovskite nanowire lasers with low lasing thresholds and high quality factors
Zhu, H., Fu, Y., Meng, F., Wu, X., Gong, Z., Ding, Q., Gustafsson, M. V., Trinh, M. T., Jin, S., & Zhu, X.-Y. (2015) · Nature Materials · doi:10.1038/nmat4271 · Cited by 2,836
Correlated electron–hole plasma in organometal perovskites
Saba, M., Cadelano, M., Marongiu, D., Chen, F., Sarritzu, V., Sestu, N., Figus, C., Aresti, M., Piras, R., Geddo Lehmann, A., et al. (2014) · Nature Communications · doi:10.1038/ncomms6049 · Cited by 603
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Absolute energy level positions in tin- and lead-based halide perovskites
Tao, S., Schmidt, I., Brocks, G., Jiang, J., Tranca, I., Meerholz, K., & Olthof, S. (2019) · Nature Communications · doi:10.1038/s41467-019-10468-7 · Cited by 734
Yettapu, G. R., Talukdar, D., Sarkar, S., Swarnkar, A., Nag, A., Ghosh, P., & Mandal, P. (2016) · Nano Letters · doi:10.1021/acs.nanolett.6b01168 · Cited by 594
Low‐Dimensional Metal Halide Perovskite Photodetectors
Wang, H., Li, S., Liu, X., Shi, Z., Fang, X., & He, J. (2021) · Advanced Materials · doi:10.1002/adma.202003309 · Cited by 574
Improving the Stability of Metal Halide Perovskite Materials and Light‐Emitting Diodes
Cho, H., Kim, Y., Wolf, C., Lee, H., & Lee, T. (2018) · Advanced Materials · doi:10.1002/adma.201704587 · Cited by 470
The Evolution of Quantum Confinement in CsPbBr3 Perovskite Nanocrystals
Butkus, J., Vashishtha, P., Chen, K., Gallaher, J. K., Prasad, S. K. K., Metin, D. Z., Laufersky, G., Gaston, N., Halpert, J. E., & Hodgkiss, J. M. (2017) · Chemistry of Materials · doi:10.1021/acs.chemmater.7b00478 · Cited by 362
Metadata
- Authors
- Yang, Y., Yang, M., Li, Z., Crisp, R., Zhu, K., & Beard, M. C.
- Venue
- The Journal of Physical Chemistry Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-11-12
- Volume
- 6
- Issue
- 23
- Pages
- 4688-4692
- ISSN
- 1948-7185 (ISSN-L)
- OpenAlex
- W2277835040
- Cited by
- 402
- References
- 3
- FWCI
- 21.49
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yang, Y., Yang, M., Li, Z., Crisp, R., Zhu, K., & Beard, M. C. (2015). Comparison of Recombination Dynamics in CH3NH3PbBr3 and CH3NH3PbI3 Perovskite Films: Influence of Exciton Binding Energy. The Journal of Physical Chemistry Letters. https://doi.org/10.1021/acs.jpclett.5b02290
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