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Title: Color-stable highly luminescent sky-blue perovskite light-emitting diodes
Authors: Xing, Jun
Zhao, Yongbiao
Askerka, Mikhail
Quan, Li Na
Gong, Xiwen
Zhao, Weijie
Zhao, Jiaxin
Tan, Hairen
Long, Guankui
Gao, Liang
Yang, Zhenyu
Voznyy, Oleksandr
Tang, Jiang
Lu, Zheng-Hong
Xiong, Qihua
Sargent, Edward H.
Keywords: Perovskite Light-emitting Diodes
DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2018
Source: Xing, J., Zhao, Y., Askerka, M., Quan, L. N., Gong, X., Zhao, W., . . . Sargent, E. H. (2018). Color-stable highly luminescent sky-blue perovskite light-emitting diodes. Nature Communications, 9(1), 3541-. doi:10.1038/s41467-018-05909-8
Series/Report no.: Nature Communications
Abstract: Perovskite light-emitting diodes (PeLEDs) have shown excellent performance in the green and near-infrared spectral regions, with high color purity, efficiency, and brightness. In order to shift the emission wavelength to the blue, compositional engineering (anion mixing) and quantum-confinement engineering (reduced-dimensionality) have been employed. Unfortunately, LED emission profiles shift with increasing driving voltages due to either phase separation or the coexistence of multiple crystal domains. Here we report color-stable sky-blue PeLEDs achieved by enhancing the phase monodispersity of quasi-2D perovskite thin films. We selected cation combinations that modulate the crystallization and layer thickness distribution of the domains. The perovskite films show a record photoluminescence quantum yield of 88% at 477 nm. The corresponding PeLEDs exhibit stable sky-blue emission under high operation voltages. A maximum luminance of 2480 cd m−2 at 490 nm is achieved, fully one order of magnitude higher than the previous record for quasi-2D blue PeLEDs.
DOI: 10.1038/s41467-018-05909-8
Rights: © 2018 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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