Efficient Luminescence from Perovskite Quantum Dot Solids

Younghoon Kim, Emre Yassitepe, Oleksandr Voznyy, Riccardo Comin, Grant Walters, Xiwen Gong, Pongsakorn Kanjanaboos, Ana F. Nogueira, Edward H. Sargent

Research output: Contribution to journalArticlepeer-review

356 Scopus citations

Abstract

© 2015 American Chemical Society. 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.
Original languageEnglish (US)
Pages (from-to)25007-25013
Number of pages7
JournalACS Applied Materials & Interfaces
Volume7
Issue number45
DOIs
StatePublished - Nov 5 2015
Externally publishedYes

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