Pressure-induced non-radiative losses in halide perovskite light-emitting diodes

Young Kwang Jung; Mayami Abdulla; Richard H. Friend; Samuel D. Stranks; Aron Walsh

doi:10.1039/d2tc01490d

Pressure-induced non-radiative losses in halide perovskite light-emitting diodes

Young Kwang Jung, Mayami Abdulla, Richard H. Friend, Samuel D. Stranks, Aron Walsh

Department of Physics

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

6 Scopus citations

Abstract

The control of non-radiative losses in light-emitting diodes (LEDs) based on metal halide perovskites is crucial to improve device efficiency. Recent studies have shown a correlation between lattice strain and electron-hole recombination. To consolidate the concept, we investigate how external pressure (strain) affects the crystal structure, electronic properties, point defect concentration, and luminescence efficiency of CH₃NH₃PbBr₃. Relativistic first-principles calculations reveal enhanced Rashba splitting and Schottky defect disorder under compression, which produce a pronounced decrease in the electroluminescence peak energy and intensity in operating CH₃NH₃PbBr₃ LEDs. The resulting model sheds light on the factors underpinning the intricate strain-property relationships in soft crystalline semiconductors.

Original language	English
Pages (from-to)	12560-12568
Number of pages	9
Journal	Journal of Materials Chemistry C
Volume	10
Issue number	35
DOIs	https://doi.org/10.1039/d2tc01490d
State	Published - 12 Aug 2022

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© 2022 The Royal Society of Chemistry.

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title = "Pressure-induced non-radiative losses in halide perovskite light-emitting diodes",

abstract = "The control of non-radiative losses in light-emitting diodes (LEDs) based on metal halide perovskites is crucial to improve device efficiency. Recent studies have shown a correlation between lattice strain and electron-hole recombination. To consolidate the concept, we investigate how external pressure (strain) affects the crystal structure, electronic properties, point defect concentration, and luminescence efficiency of CH3NH3PbBr3. Relativistic first-principles calculations reveal enhanced Rashba splitting and Schottky defect disorder under compression, which produce a pronounced decrease in the electroluminescence peak energy and intensity in operating CH3NH3PbBr3 LEDs. The resulting model sheds light on the factors underpinning the intricate strain-property relationships in soft crystalline semiconductors.",

author = "Jung, {Young Kwang} and Mayami Abdulla and Friend, {Richard H.} and Stranks, {Samuel D.} and Aron Walsh",

note = "Publisher Copyright: {\textcopyright} 2022 The Royal Society of Chemistry.",

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AU - Jung, Young Kwang

AU - Abdulla, Mayami

AU - Friend, Richard H.

AU - Stranks, Samuel D.

AU - Walsh, Aron

PY - 2022/8/12

Y1 - 2022/8/12

N2 - The control of non-radiative losses in light-emitting diodes (LEDs) based on metal halide perovskites is crucial to improve device efficiency. Recent studies have shown a correlation between lattice strain and electron-hole recombination. To consolidate the concept, we investigate how external pressure (strain) affects the crystal structure, electronic properties, point defect concentration, and luminescence efficiency of CH3NH3PbBr3. Relativistic first-principles calculations reveal enhanced Rashba splitting and Schottky defect disorder under compression, which produce a pronounced decrease in the electroluminescence peak energy and intensity in operating CH3NH3PbBr3 LEDs. The resulting model sheds light on the factors underpinning the intricate strain-property relationships in soft crystalline semiconductors.

AB - The control of non-radiative losses in light-emitting diodes (LEDs) based on metal halide perovskites is crucial to improve device efficiency. Recent studies have shown a correlation between lattice strain and electron-hole recombination. To consolidate the concept, we investigate how external pressure (strain) affects the crystal structure, electronic properties, point defect concentration, and luminescence efficiency of CH3NH3PbBr3. Relativistic first-principles calculations reveal enhanced Rashba splitting and Schottky defect disorder under compression, which produce a pronounced decrease in the electroluminescence peak energy and intensity in operating CH3NH3PbBr3 LEDs. The resulting model sheds light on the factors underpinning the intricate strain-property relationships in soft crystalline semiconductors.

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DO - 10.1039/d2tc01490d

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JO - Journal of Materials Chemistry C

JF - Journal of Materials Chemistry C

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ER -

Pressure-induced non-radiative losses in halide perovskite light-emitting diodes

Abstract

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