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Identification of Trap States in Perovskite Solar Cells
Abstract
Thermally stimulated current (TSC) measurements are used to characterize electronic trap states in methylammonium lead iodide perovsite solar cells. Several TSC peaks were observed over the temperature range from 20 K to room temperature. To elucidate the origins of these peaks, devices with various organic charge transport layers and devices without transport layers were tested. Two peaks appear at very low temperatures, indicating shallow trap states that are mainly attributed to the PCBM/C60 electron transport bilayer. However, two additional peaks appear at higher temperatures, that is, they are deeper in energy, and are assigned to the perovskite layer. At around T = 163 K, a sharp peak, also present in the dark TSC measurements, is assigned to the orthorhombic-tetragonal phase transition in the perovskite. However, a peak at around T = 191 K is assigned to trap states with activation energies of around 500 meV but with a rather low concentration of 1 × 10(21) m(-3).
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Cited by
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Manser, J. S., Christians, J. A., & Kamat, P. V. (2016) · Chemical Reviews · doi:10.1021/acs.chemrev.6b00136 · Cited by 2,020
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
Impact of strain relaxation on performance of α-formamidinium lead iodide perovskite solar cells
Kim, G., Min, H., Lee, K. S., Lee, D. Y., Yoon, S. M., & Seok, S. I. (2020) · Science · doi:10.1126/science.abc4417 · Cited by 1,346
Pandey, R., Vats, G., Yun, J., Bowen, C. R., Ho‐Baillie, A. W. Y., Seidel, J., Butler, K. T., & Seok, S. I. (2019) · Advanced Materials · doi:10.1002/adma.201807376 · Cited by 1,069
Tress, W., Yavari, M., Domanski, K., Yadav, P., Niesen, B., Correa Baena, J. P., Hagfeldt, A., & Graetzel, M. (2018) · Energy & Environmental Science · doi:10.1039/c7ee02415k · Cited by 843
Metadata
- Authors
- Baumann, A., Väth, S., Rieder, P., Heiber, M. C., Tvingstedt, K., & Dyakonov, V.
- Venue
- The Journal of Physical Chemistry Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-06-08
- Volume
- 6
- Issue
- 12
- Pages
- 2350-2354
- ISSN
- 1948-7185 (ISSN-L)
- OpenAlex
- W2415925171
- Cited by
- 238
- References
- 0
- FWCI
- 14.59
- Type
- journal article
- Language
- en
- Open access
- closed
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- Baumann, A., Väth, S., Rieder, P., Heiber, M. C., Tvingstedt, K., & Dyakonov, V. (2015). Identification of Trap States in Perovskite Solar Cells. The Journal of Physical Chemistry Letters. https://doi.org/10.1021/acs.jpclett.5b00953
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