The DOI matches its Crossref record; 4 of the 4 references it cites were found in a registry or an index.
Interfacial Electron Transfer Barrier at Compact TiO2/CH3NH3PbI3Heterojunction
Abstract
Low-temperature solution-processed CH3 NH3 PbI3 interfaced with TiO2 has recently been demonstrated as a highly successful type-II light harvesting heterojunction with ≈20% efficiency. Therefore, an efficient ultrafast photoexcited electron transfer from CH3 NH3 PbI3 to TiO2 is expected. However, by probing the photoexcited charge carrier dynamics in CH3 NH3 PbI3 /quartz, CH3 NH3 PbI3 /TiO2 (compact), and CH3 NH3 PbI3 /PCBM in a comparative study, an electron transfer potential barrier between CH3 NH3 PbI3 and the compact TiO2 (prepared with the spray pyrolysis method) formed by surface states is uncovered. Consequently, the CH3 NH3 PbI3 photoluminescence intensity and lifetime is enhanced when interfaced to compact TiO2 . The electron accumulation within CH3 NH3 PbI3 needed to overcome this interfacial potential barrier results in the undesirable large current-voltage hysteresis observed for CH3 NH3 PbI3 /TiO2 planar heterojunctions. The findings in this study indicate that careful surface engineering to reduce this potential barrier is key to pushing perovskite solar cell efficiencies toward the theoretical limit.
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Cites
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The surface science of titanium dioxide
Diebold, U. (2003) · Surface Science Reports · doi:10.1016/s0167-5729(02)00100-0 · Cited by 7,944
Cited by
Defect migration in methylammonium lead iodide and its role in perovskite solar cell operation
Azpiroz, J. M., Mosconi, E., Bisquert, J., & De Angelis, F. (2015) · Energy & Environmental Science · doi:10.1039/c5ee01265a · Cited by 1,644
Planar‐Structure Perovskite Solar Cells with Efficiency beyond 21%
Jiang, Q., Chu, Z., Wang, P., Yang, X., Liu, H., Wang, Y., Yin, Z., Wu, J., Zhang, X., & You, J. (2017) · Advanced Materials · doi:10.1002/adma.201703852 · Cited by 1,250
Giordano, F., Abate, A., Correa Baena, J. P., Saliba, M., Matsui, T., Im, S. H., Zakeeruddin, S. M., Nazeeruddin, M. K., Hagfeldt, A., & Graetzel, M. (2016) · Nature Communications · doi:10.1038/ncomms10379 · Cited by 869
Causes and Solutions of Recombination in Perovskite Solar Cells
Chen, J., & Park, N. (2019) · Advanced Materials · doi:10.1002/adma.201803019 · Cited by 733
Extrinsic ion migration in perovskite solar cells
Li, Z., Xiao, C., Yang, Y., Harvey, S. P., Kim, D. H., Christians, J. A., Yang, M., Schulz, P., Nanayakkara, S. U., Jiang, C.-S., et al. (2017) · Energy & Environmental Science · doi:10.1039/c7ee00358g · Cited by 631
Metadata
- Authors
- Xing, G., Wu, B., Chen, S., Chua, J., Yantara, N., Mhaisalkar, S., Mathews, N., & Sum, T. C.
- Venue
- Small
- Publisher
- Wiley
- Published
- 2015-03-30
- Volume
- 11
- Issue
- 29
- Pages
- 3606-3613
- ISSN
- 1613-6810 (ISSN-L)
- OpenAlex
- W2168175413
- Cited by
- 221
- References
- 4
- FWCI
- 17.48
- Type
- journal article
- Language
- en
- Open access
- closed
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- Xing, G., Wu, B., Chen, S., Chua, J., Yantara, N., Mhaisalkar, S., Mathews, N., & Sum, T. C. (2015). Interfacial Electron Transfer Barrier at Compact TiO2/CH3NH3PbI3Heterojunction. Small. https://doi.org/10.1002/smll.201403719
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