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Phase‐Stable CsPbI3 Nanocrystals: The Reaction Temperature Matters
Abstract
High temperature colloidal synthesis for obtaining thermal, colloidal and phase‐stable CsPbI 3 nanocrystals with near‐unity quantum yield is reported. While standard perovskite synthesis reactions were carried out at 160 °C (below 200 °C), increase of another ≈100 °C enabled the alkylammonium ions to passivate the surface firmly and prevented the nanocrystals from phase transformation. This did not require any inert atmosphere storage, use of heteroatoms, specially designed ligands, or the ice cooling protocol. Either at high temperature in reaction flask or in the crude mixture or purified dispersed solution; these nanocrystals were observed stable and retained the original emission. Different spectroscopic analyses were carried out and details of the surface binding of alkyl ammonium ligands in place of surface Cs in the crystal lattice were investigated. As CsPbI 3 is one of the most demanding optical materials, bringing stability by proper surface functionalization without use of secondary additives would indeed help in wide spreading of their applications.
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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
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Wei, Y., Cheng, Z., & Lin, J. (2019) · Chemical Society Reviews · doi:10.1039/c8cs00740c · Cited by 1,206
Dutta, A., Behera, R. K., Pal, P., Baitalik, S., & Pradhan, N. (2019) · Angewandte Chemie International Edition · doi:10.1002/anie.201900374 · Cited by 361
Self-citationCs-Lattice Extension and Expansion for Inducing Secondary Growth of CsPbBr3 Perovskite Nanocrystals
Dutta, S. K., Bera, S., Behera, R. K., Hudait, B., & Pradhan, N. (2021) · ACS Nano · doi:10.1021/acsnano.1c05053 · Cited by 28
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Metadata
- Authors
- Dutta, A., Dutta, S. K., Das Adhikari, S., & Pradhan, N.
- Venue
- Angewandte Chemie International Edition
- Publisher
- Wiley
- Published
- 2018-06-19
- Volume
- 57
- Issue
- 29
- Pages
- 9083-9087
- ISSN
- 1433-7851 (ISSN-L)
- 1521-3773
- OpenAlex
- W2801179545
- Cited by
- 195
- References
- 1
- FWCI
- 10.07
- Type
- journal article
- Language
- en
- Open access
- closed
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