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Experimental and first-principles investigation of Cr-driven color change in cesium lead halide perovskites.
- Source :
- Journal of Applied Physics; 6/14/2019, Vol. 125 Issue 22, pN.PAG-N.PAG, 8p, 1 Color Photograph, 1 Diagram, 4 Graphs
- Publication Year :
- 2019
-
Abstract
- Herein, we report room temperature Cr-doping for all-inorganic perovskites that have attracted great attention in recent years due to their extraordinary optical properties, low cost, and ease of synthesis. Incorporation of Cr 3 + ions into the perovskite crystal lattices is achieved by following a facile route involving an antisolvent recrystallization method at room temperature. It is shown that both Cr-doping and formation of crystals in the CsPbBr x Cl 3 − x phase are provided by increasing the concentration of the CrCl 3 solution. It is also observed that the doping procedure leads to the emergence of three types of distinctive peaks in the PL spectrum originating from CsPbBr x Cl 3 − x domains (476–427 nm), Cr-strained host lattices (515 nm), and midgap states formed by Cr dopants (675–775 nm). It is also found that the Cr-doped perovskites emitting a dark violaceous color change their color to white with a high color rendering index (88) in 30-day time intervals. Easy-tunable optical properties of all-inorganic Cs perovskites indicate their great potential for future optoelectronic device applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 125
- Issue :
- 22
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 137016364
- Full Text :
- https://doi.org/10.1063/1.5092779