1. Large-Scale Synthesis of Highly Luminescent Perovskite-Related CsPb2 Br5 Nanoplatelets and Their Fast Anion Exchange
- Author
-
Shu-Hong Yu, Lei Li, Hong-Bin Yao, Hai-Sheng Qian, Liang Wu, and Kun-Hua Wang
- Subjects
Materials science ,Photoluminescence ,Precipitation (chemistry) ,Nanotechnology ,Crystal growth ,General Chemistry ,Crystal structure ,02 engineering and technology ,General Medicine ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Catalysis ,Nanomaterials ,0104 chemical sciences ,Nanocrystal ,Luminescence ,0210 nano-technology ,Perovskite (structure) - Abstract
All-inorganic cesium lead-halide perovskite nanocrystals have emerged as attractive optoelectronic nanomaterials owing to their stabilities and highly efficient photoluminescence. Herein we report a new type of highly luminescent perovskite-related CsPb2 Br5 nanoplatelets synthesized by a facile precipitation reaction. The layered crystal structure of CsPb2 Br5 promoted an anisotropic two-dimensional (2D) crystal growth during the precipitation process, thus enabling the large-scale synthesis of CsPb2 Br5 nanoplatelets. Fast anion exchange has also been demonstrated in as-synthesized CsPb2 Br5 nanoplatelets to extend their photoluminescence spectra to the entire visible spectral region. The large-scale synthesis and optical tunability of CsPb2 Br5 nanoplatelets will be advantageous in future applications of optoelectronic devices.
- Published
- 2016