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Improving the Stability and Size Tunability of Cesium Lead Halide Perovskite Nanocrystals Using Trioctylphosphine Oxide as the Capping Ligand
Abstract
Recently, all-inorganic cesium lead halide (CsPbX 3, X = Cl, Br, and I) nanocrystals (NCs) have drawn wide attention because of their excellent optoelectronic properties and potential applications. However, one of the most significant challenges of such NCs is their low stability against protonic solvents. In this work, we demonstrate that by incorporating a highly branched capping ligand, trioctylphosphine oxide (TOPO), into the traditional oleic acid/oleylamine system, monodisperse CsPbX 3 NCs with excellent optoelectronic properties can be achieved at elevated temperatures (up to 260 °C). The size of such NCs can be varied in a relatively wide range. The capping of TOPO on NCs has been verified through Fourier transform infrared spectroscopy measurement. More importantly, the presence of TOPO can dramatically improve the stability of CsPbX 3 NCs against ethanol treatment. After ethanol treatment for 100 min, the emission intensity of the TOPO-capped sample dropped only 5%, whereas that of non-TOPO-capped NCs dropped up to 86%. This work may shed some light on the preparation and application of CsPbX 3 NCs with higher stability.
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Cites
Colloidal nanocrystal synthesis and the organic–inorganic interface
Yin, Y., & Alivisatos, A. P. (2005) · Nature · doi:10.1038/nature04165 · Cited by 3,273
Akkerman, Q. A., D’Innocenzo, V., Accornero, S., Scarpellini, A., Petrozza, A., Prato, M., & Manna, L. (2015) · Journal of the American Chemical Society · doi:10.1021/jacs.5b05602 · Cited by 2,197
Cited by
Wei, Y., Cheng, Z., & Lin, J. (2019) · Chemical Society Reviews · doi:10.1039/c8cs00740c · Cited by 1,206
Bodnarchuk, M. I., Boehme, S. C., ten Brinck, S., Bernasconi, C., Shynkarenko, Y., Krieg, F., Widmer, R., Aeschlimann, B., Günther, D., Kovalenko, M. V., et al. (2019) · ACS Energy Letters · doi:10.1021/acsenergylett.8b01669 · Cited by 466
Blue perovskite light-emitting diodes: progress, challenges and future directions
Kumawat, N. K., Liu, X.-K., Kabra, D., & Gao, F. (2019) · Nanoscale · doi:10.1039/c8nr09885a · Cited by 268
Metadata
- Authors
- Wu, L., Zhong, Q., Yang, D., Chen, M., Hu, H., Pan, Q., Liu, H., Cao, M., Xu, Y., Sun, B., & Zhang, Q.
- Venue
- Langmuir
- Publisher
- American Chemical Society (ACS)
- Published
- 2017-10-27
- Volume
- 33
- Issue
- 44
- Pages
- 12689-12696
- ISSN
- 0743-7463 (ISSN-L)
- 1520-5827
- OpenAlex
- W2766602855
- Cited by
- 216
- References
- 2
- FWCI
- 8.73
- Type
- journal article
- Language
- en
- Open access
- closed
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- Wu, L., Zhong, Q., Yang, D., Chen, M., Hu, H., Pan, Q., Liu, H., Cao, M., Xu, Y., Sun, B., & Zhang, Q. (2017). Improving the Stability and Size Tunability of Cesium Lead Halide Perovskite Nanocrystals Using Trioctylphosphine Oxide as the Capping Ligand. Langmuir. https://doi.org/10.1021/acs.langmuir.7b02963
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