A transient-electroluminescence study on perovskite light-emitting diodes

Mengmeng Xu; Qiming Peng; Wei Zou; Lianghui Gu; Lei Xu; Lu Cheng; Yarong He; Ming Yang; Nana Wang; Wei Huang; Jianpu Wang

doi:10.1063/1.5099277

A transient-electroluminescence study on perovskite light-emitting diodes

Mengmeng Xu, Qiming Peng, Wei Zou, Lianghui Gu, Lei Xu, Lu Cheng, Yarong He, Ming Yang, Nana Wang, Wei Huang, Jianpu Wang

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

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Abstract

We carried out transient-electroluminescence (Tr-EL) studies on multiple-quantum-well (MQW)-based perovskite light-emitting diodes (PeLEDs). The Tr-EL shows a short onset time (τ_d ∼0.1 μs) and rising time (τ_r ∼0.15 μs), demonstrating high carrier mobility in the MQW perovskites. The electron-mobility in the MQW perovskites was evaluated to be on the order of 10^-5 cm² V^-1 s^-1. When the pulses are turned off, the Tr-EL decays to zero in around 1 μs, indicating a low trap density in the MQW perovskites which was estimated to be on the order of 10¹⁵ cm^-3. Besides, the Tr-EL enables us to study the EL properties of PeLEDs at intense current densities, with the results showing that both the "Auger" recombination and "Joule" heating are the main causes of the efficiency droop at current densities of tens of ampere per centimeter square.

Original language	English
Article number	041102
Journal	Applied Physics Letters
Volume	115
Issue number	4
DOIs	https://doi.org/10.1063/1.5099277
State	Published - 22 Jul 2019

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title = "A transient-electroluminescence study on perovskite light-emitting diodes",

abstract = "We carried out transient-electroluminescence (Tr-EL) studies on multiple-quantum-well (MQW)-based perovskite light-emitting diodes (PeLEDs). The Tr-EL shows a short onset time (τd ∼0.1 μs) and rising time (τr ∼0.15 μs), demonstrating high carrier mobility in the MQW perovskites. The electron-mobility in the MQW perovskites was evaluated to be on the order of 10-5 cm2 V-1 s-1. When the pulses are turned off, the Tr-EL decays to zero in around 1 μs, indicating a low trap density in the MQW perovskites which was estimated to be on the order of 1015 cm-3. Besides, the Tr-EL enables us to study the EL properties of PeLEDs at intense current densities, with the results showing that both the {"}Auger{"} recombination and {"}Joule{"} heating are the main causes of the efficiency droop at current densities of tens of ampere per centimeter square.",

author = "Mengmeng Xu and Qiming Peng and Wei Zou and Lianghui Gu and Lei Xu and Lu Cheng and Yarong He and Ming Yang and Nana Wang and Wei Huang and Jianpu Wang",

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doi = "10.1063/1.5099277",

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T1 - A transient-electroluminescence study on perovskite light-emitting diodes

AU - Xu, Mengmeng

AU - Peng, Qiming

AU - Zou, Wei

AU - Gu, Lianghui

AU - Xu, Lei

AU - Cheng, Lu

AU - He, Yarong

AU - Yang, Ming

AU - Wang, Nana

AU - Huang, Wei

AU - Wang, Jianpu

PY - 2019/7/22

Y1 - 2019/7/22

N2 - We carried out transient-electroluminescence (Tr-EL) studies on multiple-quantum-well (MQW)-based perovskite light-emitting diodes (PeLEDs). The Tr-EL shows a short onset time (τd ∼0.1 μs) and rising time (τr ∼0.15 μs), demonstrating high carrier mobility in the MQW perovskites. The electron-mobility in the MQW perovskites was evaluated to be on the order of 10-5 cm2 V-1 s-1. When the pulses are turned off, the Tr-EL decays to zero in around 1 μs, indicating a low trap density in the MQW perovskites which was estimated to be on the order of 1015 cm-3. Besides, the Tr-EL enables us to study the EL properties of PeLEDs at intense current densities, with the results showing that both the "Auger" recombination and "Joule" heating are the main causes of the efficiency droop at current densities of tens of ampere per centimeter square.

AB - We carried out transient-electroluminescence (Tr-EL) studies on multiple-quantum-well (MQW)-based perovskite light-emitting diodes (PeLEDs). The Tr-EL shows a short onset time (τd ∼0.1 μs) and rising time (τr ∼0.15 μs), demonstrating high carrier mobility in the MQW perovskites. The electron-mobility in the MQW perovskites was evaluated to be on the order of 10-5 cm2 V-1 s-1. When the pulses are turned off, the Tr-EL decays to zero in around 1 μs, indicating a low trap density in the MQW perovskites which was estimated to be on the order of 1015 cm-3. Besides, the Tr-EL enables us to study the EL properties of PeLEDs at intense current densities, with the results showing that both the "Auger" recombination and "Joule" heating are the main causes of the efficiency droop at current densities of tens of ampere per centimeter square.

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DO - 10.1063/1.5099277

M3 - 文章

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SN - 0003-6951

VL - 115

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 4

M1 - 041102

ER -

A transient-electroluminescence study on perovskite light-emitting diodes

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