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Charge Carriers in Planar and Meso-Structured Organic–Inorganic Perovskites: Mobilities, Lifetimes, and Concentrations of Trap States
Abstract
Efficient solar cells have been obtained using thin films of solution-processed organic-inorganic perovskites. However, there remains limited knowledge about the relationship between preparation route and optoelectronic properties. We use complementary time-resolved microwave conductivity (TRMC) and photoluminescence (PL) measurements to investigate the charge carrier dynamics in thin planar films of CH3NH3PbI(3-x)Cl(x), CH3NH3PbI3, and their meso-structured analogues. High mobilities close to 30 cm(2)/(V s) and microsecond-long lifetimes are found in thin films of CH3NH3PbI(3-x)Cl(x), compared to lifetimes of only a few hundred nanoseconds in CH3NH3PbI3 and meso-structured perovskites. We describe our TRMC and PL experiments with a global kinetic model, using one set of kinetic parameters characteristic for each sample. We find that the trap density is less than 5 × 10(14) cm(-3) in CH3NH3PbI(3-x)Cl(x), 6 × 10(16) cm(-3) in the CH3NH3PbI3 thin film and ca. 10(15) cm(-3) in both meso-structured perovskites. Furthermore, our results imply that band-to-band recombination is enhanced by the presence of dark carriers resulting from unintentional doping of the perovskites. Finally, our general approach to determine concentrations of trap states and dark carriers is also highly relevant to other semiconductor materials.
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Stranks, S. D., Eperon, G. E., Grancini, G., Menelaou, C., Alcocer, M. J. P., Leijtens, T., Herz, L. M., Petrozza, A., & Snaith, H. J. (2013) · Science · doi:10.1126/science.1243982 · Cited by 10,413
Self-citationImpact of microstructure on local carrier lifetime in perovskite solar cells
de Quilettes, D. W., Vorpahl, S. M., Stranks, S. D., Nagaoka, H., Eperon, G. E., Ziffer, M. E., Snaith, H. J., & Ginger, D. S. (2015) · Science · doi:10.1126/science.aaa5333 · Cited by 2,198
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Cited by
Brenner, T. M., Egger, D. A., Kronik, L., Hodes, G., & Cahen, D. (2016) · Nature Reviews Materials · doi:10.1038/natrevmats.2015.7 · Cited by 1,557
Ahmadi, M., Wu, T., & Hu, B. (2017) · Advanced Materials · doi:10.1002/adma.201605242 · Cited by 820
Metal-Doped Lead Halide Perovskites: Synthesis, Properties, and Optoelectronic Applications
Zhou, Y., Chen, J., Bakr, O. M., & Sun, H.-T. (2018) · Chemistry of Materials · doi:10.1021/acs.chemmater.8b02989 · Cited by 650
Tress, W. (2017) · Advanced Energy Materials · doi:10.1002/aenm.201602358 · Cited by 601
Richter, J. M., Abdi-Jalebi, M., Sadhanala, A., Tabachnyk, M., Rivett, J. P. H., Pazos-Outón, L. M., Gödel, K. C., Price, M., Deschler, F., & Friend, R. H. (2016) · Nature Communications · doi:10.1038/ncomms13941 · Cited by 554
Metadata
- Authors
- Hutter, E. M., Eperon, G. E., Stranks, S. D., & Savenije, T. J.
- Venue
- The Journal of Physical Chemistry Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-07-24
- Volume
- 6
- Issue
- 15
- Pages
- 3082-3090
- ISSN
- 1948-7185 (ISSN-L)
- OpenAlex
- W2342830493
- Cited by
- 302
- References
- 2
- FWCI
- 18.60
- Type
- journal article
- Language
- en
- Open access
- closed
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- Hutter, E. M., Eperon, G. E., Stranks, S. D., & Savenije, T. J. (2015). Charge Carriers in Planar and Meso-Structured Organic–Inorganic Perovskites: Mobilities, Lifetimes, and Concentrations of Trap States. The Journal of Physical Chemistry Letters. https://doi.org/10.1021/acs.jpclett.5b01361
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