Efficient Luminescence from Perovskite Quantum Dot Solids

Type
Article

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

KAUST Grant Number
KUS-11-009-21

Online Publication Date
2015-11-05

Print Publication Date
2015-11-18

Date
2015-11-05

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.

Citation
Kim Y, Yassitepe E, Voznyy O, Comin R, Walters G, et al. (2015) Efficient Luminescence from Perovskite Quantum Dot Solids. ACS Applied Materials & Interfaces 7: 25007–25013. Available: http://dx.doi.org/10.1021/acsami.5b09084.

Acknowledgements
This publication is based in part on work supported by Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. E.Y. acknowledges support from Sao Paulo State Research Foundation-Research Internships Abroad (FAPESP-BEPE) (2014/18327-9) fellowship. The authors thank E. Palmiano, R. Wolowiec, and D. Kopilovic for their technical help over the course of this study. We thank the Centre for Microfluidic Systems in Chemistry and Biology (Toronto, Ontario) for the use of an atomic force microscope.

Publisher
American Chemical Society (ACS)

Journal
ACS Applied Materials & Interfaces

DOI
10.1021/acsami.5b09084

PubMed ID
26529572

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