Dimensional Tailoring of Ultrahigh Vacuum Annealing-Assisted Quantum Wells for the Efficiency Enhancement of Perovskite Light-Emitting Diodes

Yong Yu; Heyong Wang; Weidong Xu; Chaoyang Kuang; Fuxiang Ji; Slawomir Braun; Xianjie Liu; Chang Yi; Feng Gao; Mats Fahlman

doi:10.1021/acsami.0c02217

Dimensional Tailoring of Ultrahigh Vacuum Annealing-Assisted Quantum Wells for the Efficiency Enhancement of Perovskite Light-Emitting Diodes

Yong Yu, Heyong Wang, Weidong Xu, Chaoyang Kuang, Fuxiang Ji, Slawomir Braun, Xianjie Liu, Chang Yi, Feng Gao, Mats Fahlman

SCHOOL OF FLEXIBLE ELECTRONICS(FUTURE TECHNOLOGIES)|INSTITUTE OF ADVANCED MATERIALS(IAM)

Linköping University

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

3 Scopus citations

Abstract

Quasi-two-dimensional (Q-2D) perovskites featured with multidimensional quantum wells (QWs) have been the main candidates for optoelectronic applications. However, excessive low-dimensional perovskites are unfavorable to the device efficiency due to the phonon-exciton interaction and the inclusion of insulating large organic cations. Herein, the formation of low-dimensional QWs is suppressed by removing the organic cation 1-naphthylmethylamine iodide (NMAI) through ultrahigh vacuum (UHV) annealing. Perovskite light-emitting diode (PLED) devices based on films annealed with optimized UHV conditions show a higher external quantum efficiency (EQE) of 13.0% and wall-plug efficiency of 11.1% compared to otherwise identical devices with films annealed in a glovebox.

Original language	English
Pages (from-to)	24965-24970
Number of pages	6
Journal	ACS Applied Materials and Interfaces
Volume	12
Issue number	22
DOIs	https://doi.org/10.1021/acsami.0c02217
State	Published - 3 Jun 2020

Keywords

dimensional tailoring
perovskite light-emitting diodes
quantum wells
quasi-two-dimensional perovskites
ultrahigh vacuum annealing

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10.1021/acsami.0c02217

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title = "Dimensional Tailoring of Ultrahigh Vacuum Annealing-Assisted Quantum Wells for the Efficiency Enhancement of Perovskite Light-Emitting Diodes",

abstract = "Quasi-two-dimensional (Q-2D) perovskites featured with multidimensional quantum wells (QWs) have been the main candidates for optoelectronic applications. However, excessive low-dimensional perovskites are unfavorable to the device efficiency due to the phonon-exciton interaction and the inclusion of insulating large organic cations. Herein, the formation of low-dimensional QWs is suppressed by removing the organic cation 1-naphthylmethylamine iodide (NMAI) through ultrahigh vacuum (UHV) annealing. Perovskite light-emitting diode (PLED) devices based on films annealed with optimized UHV conditions show a higher external quantum efficiency (EQE) of 13.0% and wall-plug efficiency of 11.1% compared to otherwise identical devices with films annealed in a glovebox.",

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author = "Yong Yu and Heyong Wang and Weidong Xu and Chaoyang Kuang and Fuxiang Ji and Slawomir Braun and Xianjie Liu and Chang Yi and Feng Gao and Mats Fahlman",

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T1 - Dimensional Tailoring of Ultrahigh Vacuum Annealing-Assisted Quantum Wells for the Efficiency Enhancement of Perovskite Light-Emitting Diodes

AU - Yu, Yong

AU - Wang, Heyong

AU - Xu, Weidong

AU - Kuang, Chaoyang

AU - Ji, Fuxiang

AU - Braun, Slawomir

AU - Liu, Xianjie

AU - Yi, Chang

AU - Gao, Feng

AU - Fahlman, Mats

PY - 2020/6/3

Y1 - 2020/6/3

N2 - Quasi-two-dimensional (Q-2D) perovskites featured with multidimensional quantum wells (QWs) have been the main candidates for optoelectronic applications. However, excessive low-dimensional perovskites are unfavorable to the device efficiency due to the phonon-exciton interaction and the inclusion of insulating large organic cations. Herein, the formation of low-dimensional QWs is suppressed by removing the organic cation 1-naphthylmethylamine iodide (NMAI) through ultrahigh vacuum (UHV) annealing. Perovskite light-emitting diode (PLED) devices based on films annealed with optimized UHV conditions show a higher external quantum efficiency (EQE) of 13.0% and wall-plug efficiency of 11.1% compared to otherwise identical devices with films annealed in a glovebox.

AB - Quasi-two-dimensional (Q-2D) perovskites featured with multidimensional quantum wells (QWs) have been the main candidates for optoelectronic applications. However, excessive low-dimensional perovskites are unfavorable to the device efficiency due to the phonon-exciton interaction and the inclusion of insulating large organic cations. Herein, the formation of low-dimensional QWs is suppressed by removing the organic cation 1-naphthylmethylamine iodide (NMAI) through ultrahigh vacuum (UHV) annealing. Perovskite light-emitting diode (PLED) devices based on films annealed with optimized UHV conditions show a higher external quantum efficiency (EQE) of 13.0% and wall-plug efficiency of 11.1% compared to otherwise identical devices with films annealed in a glovebox.

KW - dimensional tailoring

KW - perovskite light-emitting diodes

KW - quantum wells

KW - quasi-two-dimensional perovskites

KW - ultrahigh vacuum annealing

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U2 - 10.1021/acsami.0c02217

DO - 10.1021/acsami.0c02217

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SN - 1944-8244

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SP - 24965

EP - 24970

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 22

ER -

Dimensional Tailoring of Ultrahigh Vacuum Annealing-Assisted Quantum Wells for the Efficiency Enhancement of Perovskite Light-Emitting Diodes

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Keywords

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