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

doi:10.1021/acsami.5b09084

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 journal › Article › peer-review

498 Scopus citations

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.

Original language	English
Pages (from-to)	25007-25013
Number of pages	7
Journal	ACS Applied Materials and Interfaces
Volume	7
Issue number	45
DOIs	https://doi.org/10.1021/acsami.5b09084
State	Published - Nov 3 2015
Externally published	Yes

Keywords

centrifugal casting
cesium lead halide
nanocrystal films
perovskites
quantum dots

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10.1021/acsami.5b09084

Cite this

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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.",

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AU - Kim, Younghoon

AU - Yassitepe, Emre

AU - Voznyy, Oleksandr

AU - Comin, Riccardo

AU - Walters, Grant

AU - Gong, Xiwen

AU - Kanjanaboos, Pongsakorn

AU - Nogueira, Ana F.

AU - Sargent, Edward H.

PY - 2015/11/3

Y1 - 2015/11/3

N2 - 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.

AB - 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.

KW - centrifugal casting

KW - cesium lead halide

KW - nanocrystal films

KW - perovskites

KW - quantum dots

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Efficient Luminescence from Perovskite Quantum Dot Solids

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Keywords

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