Enhanced photoluminescence quantum yield of MAPbBr3 nanocrystals by passivation using graphene

Youngsin Park; Atanu Jana; Chang Woo Myung; Taeseung Yoon; Geungsik Lee; Claudius C. Kocher; Guanhua Ying; Vitaly Osokin; Robert A. Taylor; Kwang S. Kim

doi:10.1007/s12274-020-2718-8

Enhanced photoluminescence quantum yield of MAPbBr₃ nanocrystals by passivation using graphene

Youngsin Park
, Atanu Jana
, Chang Woo Myung
, Taeseung Yoon
, Geungsik Lee
, Claudius C. Kocher
, Guanhua Ying
, Vitaly Osokin
, Robert A. Taylor
, Kwang S. Kim

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

Diminishing surface defect states in perovskite nanocrystals is a highly challenging subject for enhancing optoelectronic device performance. We synthesized organic/inorganic lead-halide perovskite MAPbBr₃ (MA = methylammonium) clusters comprising nanocrystals with diameters ranging between 20–30 nm and characterized an enhanced photoluminescence (PL) quantum yield (as much as ~ 7 times) by encapsulating the MAPbBr₃ with graphene (Gr). The optical properties of MAPbBr₃ and Gr/MAPbBr₃ were investigated by temperature-dependent micro-PL and time-resolved PL measurements. Density functional theory calculations show that the surface defect states in MAPbBr₃ are removed and the optical band gap is reduced by a 0.15 eV by encapsulation with graphene due to partial restoration of lattice distortions. [Figure not available: see fulltext.].

Original language	English
Pages (from-to)	932-938
Number of pages	7
Journal	Nano Research
Volume	13
Issue number	4
DOIs	https://doi.org/10.1007/s12274-020-2718-8
State	Published - 1 Apr 2020

Keywords

density functional theory calculations
graphene
perovskite nanocluster
photoluminescence
surface passivation

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10.1007/s12274-020-2718-8

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title = "Enhanced photoluminescence quantum yield of MAPbBr3 nanocrystals by passivation using graphene",

abstract = "Diminishing surface defect states in perovskite nanocrystals is a highly challenging subject for enhancing optoelectronic device performance. We synthesized organic/inorganic lead-halide perovskite MAPbBr3 (MA = methylammonium) clusters comprising nanocrystals with diameters ranging between 20–30 nm and characterized an enhanced photoluminescence (PL) quantum yield (as much as \textasciitilde{} 7 times) by encapsulating the MAPbBr3 with graphene (Gr). The optical properties of MAPbBr3 and Gr/MAPbBr3 were investigated by temperature-dependent micro-PL and time-resolved PL measurements. Density functional theory calculations show that the surface defect states in MAPbBr3 are removed and the optical band gap is reduced by a 0.15 eV by encapsulation with graphene due to partial restoration of lattice distortions. [Figure not available: see fulltext.].",

keywords = "density functional theory calculations, graphene, perovskite nanocluster, photoluminescence, surface passivation",

author = "Youngsin Park and Atanu Jana and Myung, \{Chang Woo\} and Taeseung Yoon and Geungsik Lee and Kocher, \{Claudius C.\} and Guanhua Ying and Vitaly Osokin and Taylor, \{Robert A.\} and Kim, \{Kwang S.\}",

note = "Publisher Copyright: {\textcopyright} 2020, Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature.",

year = "2020",

month = apr,

day = "1",

doi = "10.1007/s12274-020-2718-8",

language = "English",

volume = "13",

pages = "932--938",

journal = "Nano Research",

issn = "1998-0124",

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TY - JOUR

T1 - Enhanced photoluminescence quantum yield of MAPbBr3 nanocrystals by passivation using graphene

AU - Park, Youngsin

AU - Jana, Atanu

AU - Myung, Chang Woo

AU - Yoon, Taeseung

AU - Lee, Geungsik

AU - Kocher, Claudius C.

AU - Ying, Guanhua

AU - Osokin, Vitaly

AU - Taylor, Robert A.

AU - Kim, Kwang S.

PY - 2020/4/1

Y1 - 2020/4/1

N2 - Diminishing surface defect states in perovskite nanocrystals is a highly challenging subject for enhancing optoelectronic device performance. We synthesized organic/inorganic lead-halide perovskite MAPbBr3 (MA = methylammonium) clusters comprising nanocrystals with diameters ranging between 20–30 nm and characterized an enhanced photoluminescence (PL) quantum yield (as much as ~ 7 times) by encapsulating the MAPbBr3 with graphene (Gr). The optical properties of MAPbBr3 and Gr/MAPbBr3 were investigated by temperature-dependent micro-PL and time-resolved PL measurements. Density functional theory calculations show that the surface defect states in MAPbBr3 are removed and the optical band gap is reduced by a 0.15 eV by encapsulation with graphene due to partial restoration of lattice distortions. [Figure not available: see fulltext.].

AB - Diminishing surface defect states in perovskite nanocrystals is a highly challenging subject for enhancing optoelectronic device performance. We synthesized organic/inorganic lead-halide perovskite MAPbBr3 (MA = methylammonium) clusters comprising nanocrystals with diameters ranging between 20–30 nm and characterized an enhanced photoluminescence (PL) quantum yield (as much as ~ 7 times) by encapsulating the MAPbBr3 with graphene (Gr). The optical properties of MAPbBr3 and Gr/MAPbBr3 were investigated by temperature-dependent micro-PL and time-resolved PL measurements. Density functional theory calculations show that the surface defect states in MAPbBr3 are removed and the optical band gap is reduced by a 0.15 eV by encapsulation with graphene due to partial restoration of lattice distortions. [Figure not available: see fulltext.].

KW - density functional theory calculations

KW - graphene

KW - perovskite nanocluster

KW - photoluminescence

KW - surface passivation

UR - https://www.scopus.com/pages/publications/85081229479

U2 - 10.1007/s12274-020-2718-8

DO - 10.1007/s12274-020-2718-8

M3 - Article

AN - SCOPUS:85081229479

SN - 1998-0124

VL - 13

SP - 932

EP - 938

JO - Nano Research

JF - Nano Research

IS - 4

ER -

Enhanced photoluminescence quantum yield of MAPbBr₃ nanocrystals by passivation using graphene

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