Morphology controlled nanocrystalline CsPbBr3 thin-film for metal halide perovskite light emitting diodes

Bong Woo Kim; Jin Hyuck Heo; Jin Kyoung Park; David Sunghwan Lee; Hyunik Park; Seong Yeon Kim; Jun Ho Kim; Sang Hyuk Im

doi:10.1016/j.jiec.2021.02.028

Morphology controlled nanocrystalline CsPbBr₃ thin-film for metal halide perovskite light emitting diodes

Bong Woo Kim, Jin Hyuck Heo, Jin Kyoung Park, David Sunghwan Lee, Hyunik Park, Seong Yeon Kim, Jun Ho Kim, Sang Hyuk Im

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

3 Citations (Scopus)

Abstract

Morphology and crystal grain size of inorganic CsPbBr₃ metal halide perovskite (MHP) films are controllable through a diffusion-controlled anti-solvent dripping crystallization method using an anti-solvent mixture of toluene (Tol):isopropanol (IPA). The 8:2 (v:v) Tol:IPA anti-solvent enables the production of a pinhole-free CsPbBr₃ MHP film with the smallest crystal grain size and the brightest photoluminescence (PL). Accordingly, the 8:2 CsPbBr₃ MHP film reveals a very uniform and strong PL mapping image. As a result, the 8:2 CsPbBr₃ MHP light emitting diode (LED) exhibits ∼12.8, ∼7.4, and ∼7.9 fold enhanced maximum electroluminescence (EL_max), current efficiency (CE_max), and external quantum efficiency (EQE_max) compared to the 10:0 pristine device. The optimized 8:2 MHP LED shows an EL_max of 22,298 cd/m², CE_max of 36.65 cd/A and EQE_max of 9.64%, respectively. In addition, the 8:2 CsPbBr₃ MHP LED with controlled morphology and grain size has better operating stability than the pristine device.

Original language	English
Pages (from-to)	417-425
Number of pages	9
Journal	Journal of Industrial and Engineering Chemistry
Volume	97
DOIs	https://doi.org/10.1016/j.jiec.2021.02.028
Publication status	Published - 2021 May 25

Keywords

Anti-solvent dripping
Crystallization
Diffusion
Inorganic metal halide perovskite
Light emitting diode

ASJC Scopus subject areas

Chemical Engineering(all)

Access to Document

10.1016/j.jiec.2021.02.028

Cite this

Morphology controlled nanocrystalline CsPbBr₃ thin-film for metal halide perovskite light emitting diodes. / Kim, Bong Woo; Heo, Jin Hyuck; Park, Jin Kyoung; Lee, David Sunghwan; Park, Hyunik; Kim, Seong Yeon; Kim, Jun Ho; Im, Sang Hyuk.

In: Journal of Industrial and Engineering Chemistry, Vol. 97, 25.05.2021, p. 417-425.

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

@article{c3c6daa9029b4a72a3dd6c2f7bc962f3,

title = "Morphology controlled nanocrystalline CsPbBr3 thin-film for metal halide perovskite light emitting diodes",

abstract = "Morphology and crystal grain size of inorganic CsPbBr3 metal halide perovskite (MHP) films are controllable through a diffusion-controlled anti-solvent dripping crystallization method using an anti-solvent mixture of toluene (Tol):isopropanol (IPA). The 8:2 (v:v) Tol:IPA anti-solvent enables the production of a pinhole-free CsPbBr3 MHP film with the smallest crystal grain size and the brightest photoluminescence (PL). Accordingly, the 8:2 CsPbBr3 MHP film reveals a very uniform and strong PL mapping image. As a result, the 8:2 CsPbBr3 MHP light emitting diode (LED) exhibits ∼12.8, ∼7.4, and ∼7.9 fold enhanced maximum electroluminescence (ELmax), current efficiency (CEmax), and external quantum efficiency (EQEmax) compared to the 10:0 pristine device. The optimized 8:2 MHP LED shows an ELmax of 22,298 cd/m2, CEmax of 36.65 cd/A and EQEmax of 9.64%, respectively. In addition, the 8:2 CsPbBr3 MHP LED with controlled morphology and grain size has better operating stability than the pristine device.",

keywords = "Anti-solvent dripping, Crystallization, Diffusion, Inorganic metal halide perovskite, Light emitting diode",

author = "Kim, {Bong Woo} and Heo, {Jin Hyuck} and Park, {Jin Kyoung} and Lee, {David Sunghwan} and Hyunik Park and Kim, {Seong Yeon} and Kim, {Jun Ho} and Im, {Sang Hyuk}",

note = "Funding Information: This study was supported by the National Research Foundation of Korea (NRF) under the Ministry of Science, ICT & Future Planning (Basic Science Research Program (No. 2021R1A5A6002853 ), Nano-Material Technology Development Program (No. 2017M3A7B4041696 ) and the Ministry of Education (No. 2020R1I1A1A01061774 ). Publisher Copyright: {\textcopyright} 2021 The Korean Society of Industrial and Engineering Chemistry",

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month = may,

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doi = "10.1016/j.jiec.2021.02.028",

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T1 - Morphology controlled nanocrystalline CsPbBr3 thin-film for metal halide perovskite light emitting diodes

AU - Kim, Bong Woo

AU - Heo, Jin Hyuck

AU - Park, Jin Kyoung

AU - Lee, David Sunghwan

AU - Park, Hyunik

AU - Kim, Seong Yeon

AU - Kim, Jun Ho

AU - Im, Sang Hyuk

N1 - Funding Information: This study was supported by the National Research Foundation of Korea (NRF) under the Ministry of Science, ICT & Future Planning (Basic Science Research Program (No. 2021R1A5A6002853 ), Nano-Material Technology Development Program (No. 2017M3A7B4041696 ) and the Ministry of Education (No. 2020R1I1A1A01061774 ). Publisher Copyright: © 2021 The Korean Society of Industrial and Engineering Chemistry

PY - 2021/5/25

Y1 - 2021/5/25

N2 - Morphology and crystal grain size of inorganic CsPbBr3 metal halide perovskite (MHP) films are controllable through a diffusion-controlled anti-solvent dripping crystallization method using an anti-solvent mixture of toluene (Tol):isopropanol (IPA). The 8:2 (v:v) Tol:IPA anti-solvent enables the production of a pinhole-free CsPbBr3 MHP film with the smallest crystal grain size and the brightest photoluminescence (PL). Accordingly, the 8:2 CsPbBr3 MHP film reveals a very uniform and strong PL mapping image. As a result, the 8:2 CsPbBr3 MHP light emitting diode (LED) exhibits ∼12.8, ∼7.4, and ∼7.9 fold enhanced maximum electroluminescence (ELmax), current efficiency (CEmax), and external quantum efficiency (EQEmax) compared to the 10:0 pristine device. The optimized 8:2 MHP LED shows an ELmax of 22,298 cd/m2, CEmax of 36.65 cd/A and EQEmax of 9.64%, respectively. In addition, the 8:2 CsPbBr3 MHP LED with controlled morphology and grain size has better operating stability than the pristine device.

AB - Morphology and crystal grain size of inorganic CsPbBr3 metal halide perovskite (MHP) films are controllable through a diffusion-controlled anti-solvent dripping crystallization method using an anti-solvent mixture of toluene (Tol):isopropanol (IPA). The 8:2 (v:v) Tol:IPA anti-solvent enables the production of a pinhole-free CsPbBr3 MHP film with the smallest crystal grain size and the brightest photoluminescence (PL). Accordingly, the 8:2 CsPbBr3 MHP film reveals a very uniform and strong PL mapping image. As a result, the 8:2 CsPbBr3 MHP light emitting diode (LED) exhibits ∼12.8, ∼7.4, and ∼7.9 fold enhanced maximum electroluminescence (ELmax), current efficiency (CEmax), and external quantum efficiency (EQEmax) compared to the 10:0 pristine device. The optimized 8:2 MHP LED shows an ELmax of 22,298 cd/m2, CEmax of 36.65 cd/A and EQEmax of 9.64%, respectively. In addition, the 8:2 CsPbBr3 MHP LED with controlled morphology and grain size has better operating stability than the pristine device.

KW - Anti-solvent dripping

KW - Crystallization

KW - Diffusion

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