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Lead‐Free Double Perovskite Cs 2 SnX 6 : Facile Solution Synthesis and Excellent Stability
- Source :
- Small. 15:1901650
- Publication Year :
- 2019
- Publisher :
- Wiley, 2019.
-
Abstract
- Long-term instability and possible lead contamination are the two main issues limiting the widespread application of organic-inorganic lead halide perovskites. Here a facile and efficient solution-phase method is demonstrated to synthesize lead-free Cs2 SnX6 (X = Br, I) with a well-defined crystal structure, long-term stability, and high yield. Based on the systematic experimental data and first-principle simulation results, Cs2 SnX6 displays excellent stability against moisture, light, and high temperature, which can be ascribed to the unique vacancy-ordered defect-variant structure, stable chemical compositions with Sn4+ , as well as the lower formation enthalpy for Cs2 SnX6 . Additionally, photodetectors based on Cs2 SnI6 are also fabricated, which show excellent performance and stability. This study provides very useful insights into the development of lead-free double perovskites with high stability.
- Subjects :
- Materials science
Enthalpy
Halide
Photodetector
02 engineering and technology
General Chemistry
Crystal structure
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Stability (probability)
Instability
0104 chemical sciences
Biomaterials
Lead (geology)
Chemical engineering
Yield (chemistry)
General Materials Science
0210 nano-technology
Biotechnology
Subjects
Details
- ISSN :
- 16136829 and 16136810
- Volume :
- 15
- Database :
- OpenAIRE
- Journal :
- Small
- Accession number :
- edsair.doi...........2d268eadd94198b50540e21abac0d813