期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 9, 页码 2799-2803出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201814547
关键词
encapsulation; perovskite nanocrystals; polar environment; stability; surface engineering
资金
- National Key Research and Development Program of China [8204700140]
- National Natural Science Foundation of China (NSFC) [8201200410, 8200903995, 8200902978]
- Beijing Natural Science Foundation [JQ18005]
Perovskite nanocrystals (PNCs) are emerging luminescent materials due to their fascinating physic-optical properties. However, their sensitive surface chemistry with organic polar solvents, oxygen, and moisture greatly hinders their developments towards practical applications. Herein we promote silica-passivated PNCs (SP-PNCs) by insitu hydrolyzing the surface ligands of (3-aminopropyl) triethoxysilane. The resultant SP-PNCs possesses a high quantum yield (QY) of 80% and are precipitable by polar solvents, such as ethanol and acetone, without destroying their surface chemistry or losing QY, which offers an eco-friendly and efficient method for separation, purification, and phase transfer of PNCs. Moreover, we further promoted a swelling-deswelling encapsulation process to incorporate the as-made SP-PNCs into non-crosslinked polystyrene microspheres (PMs), which can largely increase the stability of the SP-PNCs against moisture for long-term storage.
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