title: Efficient Luminescence from Perovskite Quantum Dot Solids.
abstract: 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.
authors.affiliation: Department of Electrical and Computer Engineering, University of Toronto , 10 King̀s College Road Toronto, Ontario M5S 3G4, Canada.
authors.forename: Younghoon
authors.initials: Y
authors.lastname: Kim
authors.affiliation: Department of Electrical and Computer Engineering, University of Toronto , 10 King̀s College Road Toronto, Ontario M5S 3G4, Canada.|Institute of Chemistry, University of Campinas, UNICAMP , P.O. Box 6154, 13084-971 Campinas, São Paulo, Brazil.
authors.forename: Emre
authors.initials: E
authors.lastname: Yassitepe
authors.affiliation: Department of Electrical and Computer Engineering, University of Toronto , 10 King̀s College Road Toronto, Ontario M5S 3G4, Canada.
authors.forename: Oleksandr
authors.initials: O
authors.lastname: Voznyy
authors.affiliation: Department of Electrical and Computer Engineering, University of Toronto , 10 King̀s College Road Toronto, Ontario M5S 3G4, Canada.
authors.forename: Riccardo
authors.initials: R
authors.lastname: Comin
authors.affiliation: Department of Electrical and Computer Engineering, University of Toronto , 10 King̀s College Road Toronto, Ontario M5S 3G4, Canada.
authors.forename: Grant
authors.initials: G
authors.lastname: Walters
authors.affiliation: Department of Electrical and Computer Engineering, University of Toronto , 10 King̀s College Road Toronto, Ontario M5S 3G4, Canada.
authors.forename: Xiwen
authors.initials: X
authors.lastname: Gong
authors.affiliation: Department of Electrical and Computer Engineering, University of Toronto , 10 King̀s College Road Toronto, Ontario M5S 3G4, Canada.
authors.forename: Pongsakorn
authors.initials: P
authors.lastname: Kanjanaboos
authors.affiliation: Institute of Chemistry, University of Campinas, UNICAMP , P.O. Box 6154, 13084-971 Campinas, São Paulo, Brazil.
authors.forename: Ana F
authors.initials: AF
authors.lastname: Nogueira
authors.affiliation: Department of Electrical and Computer Engineering, University of Toronto , 10 King̀s College Road Toronto, Ontario M5S 3G4, Canada.
authors.forename: Edward H
authors.initials: EH
authors.lastname: Sargent
keywords: centrifugal casting; cesium lead halide; nanocrystal films; perovskites; quantum dots