期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 45, 页码 25007-25013出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b09084
关键词
cesium lead halide; perovskites; quantum dots; centrifugal casting; nanocrystal films
资金
- King Abdullah University of Science and Technology (KAUST) [KUS-11-009-21]
- Ontario Research Fund Research Excellence Program
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- Sao Paulo State Research Foundation-Research Internships Abroad (FAPESP-BEPE) fellowship [2014/18327-9]
Nanocrystals of CsPbX3 perovskites are promising materials for light-emitting optoelectronics because of their colloidal stability, optically tunable bandgap, bright photoluminescence, and excellent photoluminescence quantum yield. Despite their promise, nanocrystal-only films of CsPbX3 perovskites have not yet been fabricated; instead, highly insulating polymers have been relied upon to compensate for nanocrystals unstable surfaces. We develop solution chemistry that enables single-step casting of perovskite nanocrystal films and overcomes problems in both perovskite quantum dot purification and film fabrication. Centrifugally cast films retain bright photoluminescence and achieve dense and homogeneous morphologies. The new materials offer a platform for optoelectronic applications of perovskite quantum dot solids.
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