Mn2+‐Doped CsPbI3 Nanocrystals for Perovskite Light‐Emitting Diodes with High Luminance and Improved Device Stability

Cubic α‐CsPbI3 has promising applications in the optoelectronic field for its excellent properties. However, α‐CsPbI3 black phase is instable at room temperature and easily converts into nonluminescent yellow orthorhombic phase (δ‐CsPbI3). Herein, the stability of α‐CsPbI3 is significantly improved...

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Autores principales:	Menglong Liu, Naizhong Jiang, Zhibin Wang, Yongping Zheng, Jinquan Hong, Shaowu Du, Daqin Chen
Formato:	article
Lenguaje:	EN
Publicado:	Wiley-VCH 2021
Materias:	CsPbI3 light-emitting diodes luminescent materials Mn2+ dopants perovskite nanocrystals Applied optics. Photonics TA1501-1820 Optics. Light QC350-467
Acceso en línea:	https://doaj.org/article/72d05c336e464587b7a32a8226710b1e
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spelling	oai:doaj.org-article:72d05c336e464587b7a32a8226710b1e2021-11-04T09:00:27ZMn2+‐Doped CsPbI3 Nanocrystals for Perovskite Light‐Emitting Diodes with High Luminance and Improved Device Stability2699-929310.1002/adpr.202100137https://doaj.org/article/72d05c336e464587b7a32a8226710b1e2021-11-01T00:00:00Zhttps://doi.org/10.1002/adpr.202100137https://doaj.org/toc/2699-9293Cubic α‐CsPbI3 has promising applications in the optoelectronic field for its excellent properties. However, α‐CsPbI3 black phase is instable at room temperature and easily converts into nonluminescent yellow orthorhombic phase (δ‐CsPbI3). Herein, the stability of α‐CsPbI3 is significantly improved by incorporating Mn2+ dopants into the perovskite lattice. Mn2+: CsPbI3 has essentially the same crystal structure as the parent α‐CsPbI3, and Mn2+ doping can promote photoluminescence quantum yield (PLQY) from 55% to 93%. Importantly, Mn2+: CsPbI3 can maintain 60% PLQY after exposing in air for 45 days, whereas the undoped CsPbI3 completely loses its luminescence in 10 days. First‐principles calculations testify that improved stability and optical properties of Mn2+: CsPbI3 are primarily attributed to the increased formation energy and tolerance factor. Accordingly, the luminance, external quantum efficiency (EQE), and T 50 lifetime of Mn2+: CsPbI3 perovskite light‐emitting diode (PeLED) reach 1066 cd m−2, 1.8%, and 2500 s, whereas the values for the undoped counterpart are only 415 cd m−2, 0.6%, and 140 s, respectively. In addition, it is evidenced that introducing a LiF buffer layer between hole transport layer and perovskite emissive layer can further boost the device performance, particularly, the luminance and T 50 lifetime achieve 1394 cd m−2 and 225 min at 140 cd m−2.Menglong LiuNaizhong JiangZhibin WangYongping ZhengJinquan HongShaowu DuDaqin ChenWiley-VCHarticleCsPbI3light-emitting diodesluminescent materialsMn2+ dopantsperovskite nanocrystalsApplied optics. PhotonicsTA1501-1820Optics. LightQC350-467ENAdvanced Photonics Research, Vol 2, Iss 11, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	CsPbI3 light-emitting diodes luminescent materials Mn2+ dopants perovskite nanocrystals Applied optics. Photonics TA1501-1820 Optics. Light QC350-467
spellingShingle	CsPbI3 light-emitting diodes luminescent materials Mn2+ dopants perovskite nanocrystals Applied optics. Photonics TA1501-1820 Optics. Light QC350-467 Menglong Liu Naizhong Jiang Zhibin Wang Yongping Zheng Jinquan Hong Shaowu Du Daqin Chen Mn2+‐Doped CsPbI3 Nanocrystals for Perovskite Light‐Emitting Diodes with High Luminance and Improved Device Stability
description	Cubic α‐CsPbI3 has promising applications in the optoelectronic field for its excellent properties. However, α‐CsPbI3 black phase is instable at room temperature and easily converts into nonluminescent yellow orthorhombic phase (δ‐CsPbI3). Herein, the stability of α‐CsPbI3 is significantly improved by incorporating Mn2+ dopants into the perovskite lattice. Mn2+: CsPbI3 has essentially the same crystal structure as the parent α‐CsPbI3, and Mn2+ doping can promote photoluminescence quantum yield (PLQY) from 55% to 93%. Importantly, Mn2+: CsPbI3 can maintain 60% PLQY after exposing in air for 45 days, whereas the undoped CsPbI3 completely loses its luminescence in 10 days. First‐principles calculations testify that improved stability and optical properties of Mn2+: CsPbI3 are primarily attributed to the increased formation energy and tolerance factor. Accordingly, the luminance, external quantum efficiency (EQE), and T 50 lifetime of Mn2+: CsPbI3 perovskite light‐emitting diode (PeLED) reach 1066 cd m−2, 1.8%, and 2500 s, whereas the values for the undoped counterpart are only 415 cd m−2, 0.6%, and 140 s, respectively. In addition, it is evidenced that introducing a LiF buffer layer between hole transport layer and perovskite emissive layer can further boost the device performance, particularly, the luminance and T 50 lifetime achieve 1394 cd m−2 and 225 min at 140 cd m−2.
format	article
author	Menglong Liu Naizhong Jiang Zhibin Wang Yongping Zheng Jinquan Hong Shaowu Du Daqin Chen
author_facet	Menglong Liu Naizhong Jiang Zhibin Wang Yongping Zheng Jinquan Hong Shaowu Du Daqin Chen
author_sort	Menglong Liu
title	Mn2+‐Doped CsPbI3 Nanocrystals for Perovskite Light‐Emitting Diodes with High Luminance and Improved Device Stability
title_short	Mn2+‐Doped CsPbI3 Nanocrystals for Perovskite Light‐Emitting Diodes with High Luminance and Improved Device Stability
title_full	Mn2+‐Doped CsPbI3 Nanocrystals for Perovskite Light‐Emitting Diodes with High Luminance and Improved Device Stability
title_fullStr	Mn2+‐Doped CsPbI3 Nanocrystals for Perovskite Light‐Emitting Diodes with High Luminance and Improved Device Stability
title_full_unstemmed	Mn2+‐Doped CsPbI3 Nanocrystals for Perovskite Light‐Emitting Diodes with High Luminance and Improved Device Stability
title_sort	mn2+‐doped cspbi3 nanocrystals for perovskite light‐emitting diodes with high luminance and improved device stability
publisher	Wiley-VCH
publishDate	2021
url	https://doaj.org/article/72d05c336e464587b7a32a8226710b1e
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Mn2+‐Doped CsPbI3 Nanocrystals for Perovskite Light‐Emitting Diodes with High Luminance and Improved Device Stability

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