Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 142, Issue 4, Pages 1786-1791Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.9b13419
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Funding
- National Natural Science Foundation of China [51772142]
- Chinese Government [2017YFE0132300]
- Australian Government [2017YFE0132300]
- Guangdong Science and Technology Department [2016ZT06C279]
- Shenzhen Science and Technology Innovation Committee [JCYJ20170412152528921, KQTD2016053019134356]
- Shenzhen Engineering Research Center for Frontier Materials Synthesis at High Pressures
- SUSTech Presidential Fund
- NSF [EAR-1634415]
- Department of Energy (DOE) [DE-FG02-94ER14466]
- DOE, Office of Science [DE-AC02-06CH11357]
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Self-trapped exciton (STE) emissions derived from inorganic octahedral units make metal halide perovskites promising photoluminescence materials for light-emitting applications. However, there is still little understanding of the intrinsic STE emissions in metal halide perovskites or derivatives with nonoctahedral units. In this work, via high pressure compression, remarkable STE emission enhancement is, for the first time, realized in one-dimensional CsCu2I3 crystals with {CuCl4} tetrahedral units. The intertetrahedral distortion is believed to induce the slight emission enhancement of the ambient phase under initial compression. Notably, the obvious structural distortions of both inter- and intratetrahedra are responsible for the significant emission enhancement of the high pressure phase. This work not only sheds light on the structure-optical property relationships of tetrahedron-based halide complexes, but also may provide guidance for the design and fabrication of highly luminescent metal halides.
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