Bright Free Exciton Electroluminescence from Mn-Doped Two-Dimensional Layered Perovskites

Liangdong Zhang; Tao Jiang; Chang Yi; Jiquan Wu; Xiao Ke Liu; Yarong He; Yanfeng Miao; Ya Zhang; Huotian Zhang; Xinrui Xie; Peng Wang; Renzhi Li; Feng Gao; Wei Huang; Jianpu Wang

doi:10.1021/acs.jpclett.9b01326

Bright Free Exciton Electroluminescence from Mn-Doped Two-Dimensional Layered Perovskites

Liangdong Zhang, Tao Jiang, Chang Yi, Jiquan Wu, Xiao Ke Liu, Yarong He, Yanfeng Miao, Ya Zhang, Huotian Zhang, Xinrui Xie, Peng Wang, Renzhi Li, Feng Gao, Wei Huang, Jianpu Wang

Institute of Flexible Electronics

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

38 Scopus citations

Abstract

Two-dimensional (2D) perovskites incorporating hydrophobic organic spacer cations show improved film stability and morphology compared to their three-dimensional (3D) counterparts. However, 2D perovskites usually exhibit low photoluminescence quantum efficiency (PLQE) owing to strong exciton-phonon interaction at room temperature, which limits their efficiency in light-emitting diodes (LEDs). Here, we demonstrate that the device performance of 2D perovskite LEDs can be significantly enhanced by doping Mn²⁺ in (benzimidazolium)₂PbI₄ 2D perovskite films to suppress the exciton-phonon interaction. The distorted [PbI₆]^4- octahedra by Mn-doping and the rigid benzimidazolium (BIZ) ring without branched chains in the 2D perovskite structure lead to improved crystallinity and rigidity of the perovskites, resulting in suppressed phonon-exciton interaction and enhanced PLQE. On the basis of this strategy, for the first time, we report yellow electroluminescence from free excitons in 2D (n = 1) perovskites with a maximum brightness of 225 cd m^-2 and a peak EQE of 0.045%.

Original language	English
Pages (from-to)	3171-3175
Number of pages	5
Journal	Journal of Physical Chemistry Letters
Volume	10
Issue number	11
DOIs	https://doi.org/10.1021/acs.jpclett.9b01326
State	Published - 6 Jun 2019

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@article{1dad7795b4fe4e1391436f1bb7277123,

title = "Bright Free Exciton Electroluminescence from Mn-Doped Two-Dimensional Layered Perovskites",

abstract = "Two-dimensional (2D) perovskites incorporating hydrophobic organic spacer cations show improved film stability and morphology compared to their three-dimensional (3D) counterparts. However, 2D perovskites usually exhibit low photoluminescence quantum efficiency (PLQE) owing to strong exciton-phonon interaction at room temperature, which limits their efficiency in light-emitting diodes (LEDs). Here, we demonstrate that the device performance of 2D perovskite LEDs can be significantly enhanced by doping Mn2+ in (benzimidazolium)2PbI4 2D perovskite films to suppress the exciton-phonon interaction. The distorted [PbI6]4- octahedra by Mn-doping and the rigid benzimidazolium (BIZ) ring without branched chains in the 2D perovskite structure lead to improved crystallinity and rigidity of the perovskites, resulting in suppressed phonon-exciton interaction and enhanced PLQE. On the basis of this strategy, for the first time, we report yellow electroluminescence from free excitons in 2D (n = 1) perovskites with a maximum brightness of 225 cd m-2 and a peak EQE of 0.045%.",

author = "Liangdong Zhang and Tao Jiang and Chang Yi and Jiquan Wu and Liu, {Xiao Ke} and Yarong He and Yanfeng Miao and Ya Zhang and Huotian Zhang and Xinrui Xie and Peng Wang and Renzhi Li and Feng Gao and Wei Huang and Jianpu Wang",

note = "Publisher Copyright: Copyright {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = jun,

day = "6",

doi = "10.1021/acs.jpclett.9b01326",

language = "英语",

volume = "10",

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publisher = "American Chemical Society",

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T1 - Bright Free Exciton Electroluminescence from Mn-Doped Two-Dimensional Layered Perovskites

AU - Zhang, Liangdong

AU - Jiang, Tao

AU - Yi, Chang

AU - Wu, Jiquan

AU - Liu, Xiao Ke

AU - He, Yarong

AU - Miao, Yanfeng

AU - Zhang, Ya

AU - Zhang, Huotian

AU - Xie, Xinrui

AU - Wang, Peng

AU - Li, Renzhi

AU - Gao, Feng

AU - Huang, Wei

AU - Wang, Jianpu

PY - 2019/6/6

Y1 - 2019/6/6

N2 - Two-dimensional (2D) perovskites incorporating hydrophobic organic spacer cations show improved film stability and morphology compared to their three-dimensional (3D) counterparts. However, 2D perovskites usually exhibit low photoluminescence quantum efficiency (PLQE) owing to strong exciton-phonon interaction at room temperature, which limits their efficiency in light-emitting diodes (LEDs). Here, we demonstrate that the device performance of 2D perovskite LEDs can be significantly enhanced by doping Mn2+ in (benzimidazolium)2PbI4 2D perovskite films to suppress the exciton-phonon interaction. The distorted [PbI6]4- octahedra by Mn-doping and the rigid benzimidazolium (BIZ) ring without branched chains in the 2D perovskite structure lead to improved crystallinity and rigidity of the perovskites, resulting in suppressed phonon-exciton interaction and enhanced PLQE. On the basis of this strategy, for the first time, we report yellow electroluminescence from free excitons in 2D (n = 1) perovskites with a maximum brightness of 225 cd m-2 and a peak EQE of 0.045%.

AB - Two-dimensional (2D) perovskites incorporating hydrophobic organic spacer cations show improved film stability and morphology compared to their three-dimensional (3D) counterparts. However, 2D perovskites usually exhibit low photoluminescence quantum efficiency (PLQE) owing to strong exciton-phonon interaction at room temperature, which limits their efficiency in light-emitting diodes (LEDs). Here, we demonstrate that the device performance of 2D perovskite LEDs can be significantly enhanced by doping Mn2+ in (benzimidazolium)2PbI4 2D perovskite films to suppress the exciton-phonon interaction. The distorted [PbI6]4- octahedra by Mn-doping and the rigid benzimidazolium (BIZ) ring without branched chains in the 2D perovskite structure lead to improved crystallinity and rigidity of the perovskites, resulting in suppressed phonon-exciton interaction and enhanced PLQE. On the basis of this strategy, for the first time, we report yellow electroluminescence from free excitons in 2D (n = 1) perovskites with a maximum brightness of 225 cd m-2 and a peak EQE of 0.045%.

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U2 - 10.1021/acs.jpclett.9b01326

DO - 10.1021/acs.jpclett.9b01326

M3 - 文章

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AN - SCOPUS:85066479734

SN - 1948-7185

VL - 10

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EP - 3175

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 11

ER -

Bright Free Exciton Electroluminescence from Mn-Doped Two-Dimensional Layered Perovskites

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