TY - JOUR
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
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021
Y1 - 2021
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
KW - Inorganic metal halide perovskite
KW - Light emitting diode
UR - http://www.scopus.com/inward/record.url?scp=85102306234&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85102306234&partnerID=8YFLogxK
U2 - 10.1016/j.jiec.2021.02.028
DO - 10.1016/j.jiec.2021.02.028
M3 - Article
AN - SCOPUS:85102306234
JO - Journal of Industrial and Engineering Chemistry
JF - Journal of Industrial and Engineering Chemistry
SN - 1226-086X
ER -