期刊
ADVANCED MATERIALS
卷 29, 期 34, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201701153
关键词
crosslinking reaction; double bond modification; light-emitting diodes; nanocrystals; perovskites; water resistant
类别
资金
- Ontario Research Fund Research Excellence Program
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- Canadian Foundation for Innovation
- DuPont
- King Abdullah University of Science and Technology (KAUST) [KUS-11-009-21]
- A. P. Sloan Foundation
- National Natural Science Foundation of China (NSFC) [21574018, 51433003]
- China Scholarship Council (CSC)
- Connaught Innovation Fund
- Connaught Global Challenge Fund
- Netherlands Organisation for Scientific Research (NWO) [680-50-1511]
Whereas organic-inorganic hybrid perovskite nanocrystals (PNCs) have remarkable potential in the development of optoelectronic materials, their relatively poor chemical and colloidal stability undermines their performance in optoelectronic devices. Herein, this issue is addressed by passivating PNCs with a class of chemically addressable ligands. The robust ligands effectively protect the PNC surfaces, enhance PNC solution processability, and can be chemically addressed by thermally induced crosslinking or radical-induced polymerization. This thin polymer shield further enhances the photoluminescence quantum yields by removing surface trap states. Crosslinked methylammonium lead bromide (MAPbBr(3)) PNCs are applied as active materials to build light-emitting diodes that have low turn-on voltages and achieve a record luminance of over 7000 cd m(-2), around threefold better than previous reported MA-based PNC devices. These results indicate the great potential of this ligand passivation approach for long lifespan, highly efficient PNC light emitters.
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