Rare-Earth-Based Perovskite Cs2AgScCl6: Bi for Strong Full Visible Spectrum Emission

Zhichao Zeng; Mingzi Sun; Shuai Zhang; Hongtu Zhang; Xiaomeng Shi; Shi Ye; Bolong Huang; Yaping Du; Chun-Hua Yan

doi:10.1002/adfm.202204780

Rare-Earth-Based Perovskite Cs₂AgScCl₆: Bi for Strong Full Visible Spectrum Emission

Zhichao Zeng, Mingzi Sun, Shuai Zhang, Hongtu Zhang, Xiaomeng Shi, Shi Ye, Bolong Huang^*, Yaping Du^*, Chun-Hua Yan

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

79 Citations (Scopus)

Abstract

Most luminescent materials can only emit light with a particular wavelength. In general, various phosphors with complementary spectral ranges are mixed to realize full-spectrum lighting. Therefore, the integration of luminescence at different wavebands in the single component matrix to obtain white emission is the optimal strategy for designing lighting materials. Thus, Sc-based double perovskite Cs₂AgScCl₆:xBi with adjustable free exciton and self-trapped exciton luminescence is synthesized by the vacuum evaporation assisted synthetic method. This perovskite can be used as white phosphor to assemble a high-quality white lighting device. Density functional theory calculations have revealed that the introduction of Bi optimizes the electron transfer and suppresses the defects in Cs₂AgScCl₆, which leads to excellent luminescent performance in a broad wavelength range. This work provides a new concept and strategy for the design and preparation of rare-earth optical perovskites in the future. © 2022 Wiley-VCH GmbH.

Original language	English
Article number	2204780
Journal	Advanced Functional Materials
Volume	32
Issue number	32
Online published	22 May 2022
DOIs	https://doi.org/10.1002/adfm.202204780
Publication status	Published - 8 Aug 2022
Externally published	Yes

Funding

The authors would like to gratefully acknowledge the financial support from the National Key R&D Program of China (2021YFA1501101), National Natural Science Foundation of China (21971117, 21771156), Functional Research Funds for the Central Universities, Nankai University (63186005), Tianjin Key Lab for Rare Earth Materials and Applications (ZB19500202), the Open Funds (No. RERU2019001) of the State Key Laboratory of Rare Earth Resource Utilization, the National Key R&D Program of China (No. 2017YFA0208000), 111 Project (No. B18030) from China, the Outstanding Youth Project of Tianjin Natural Science Foundation (20JCJQJC00130), the Key Project of Tianjin Natural Science Foundation (20JCZDJC00650), the NSFC/RGC Joint Research Scheme Project (N_PolyU502/21), and the funding for Projects of Strategic Importance of The Hong Kong Polytechnic University (Project Code: 1-ZE2V). The authors would like to thank Prof. Chunhai Wang from Northwestern Polytechnical University and Mingxing Chen at Analytical Instrumentation Center of Peking University for their support in structural analysis and spectral measurement.

Research Keywords

exciton regulating
excitonic luminescence
full spectra
rare-earth perovskites
white emissions

RGC Funding Information

RGC-funded

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10.1002/adfm.202204780

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Cite this

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title = "Rare-Earth-Based Perovskite Cs2AgScCl6: Bi for Strong Full Visible Spectrum Emission",

abstract = "Most luminescent materials can only emit light with a particular wavelength. In general, various phosphors with complementary spectral ranges are mixed to realize full-spectrum lighting. Therefore, the integration of luminescence at different wavebands in the single component matrix to obtain white emission is the optimal strategy for designing lighting materials. Thus, Sc-based double perovskite Cs2AgScCl6:xBi with adjustable free exciton and self-trapped exciton luminescence is synthesized by the vacuum evaporation assisted synthetic method. This perovskite can be used as white phosphor to assemble a high-quality white lighting device. Density functional theory calculations have revealed that the introduction of Bi optimizes the electron transfer and suppresses the defects in Cs2AgScCl6, which leads to excellent luminescent performance in a broad wavelength range. This work provides a new concept and strategy for the design and preparation of rare-earth optical perovskites in the future. {\textcopyright} 2022 Wiley-VCH GmbH.",

keywords = "exciton regulating, excitonic luminescence, full spectra, rare-earth perovskites, white emissions",

author = "Zhichao Zeng and Mingzi Sun and Shuai Zhang and Hongtu Zhang and Xiaomeng Shi and Shi Ye and Bolong Huang and Yaping Du and Chun-Hua Yan",

year = "2022",

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T2 - Bi for Strong Full Visible Spectrum Emission

AU - Zeng, Zhichao

AU - Sun, Mingzi

AU - Zhang, Shuai

AU - Zhang, Hongtu

AU - Shi, Xiaomeng

AU - Ye, Shi

AU - Huang, Bolong

AU - Du, Yaping

AU - Yan, Chun-Hua

PY - 2022/8/8

Y1 - 2022/8/8

N2 - Most luminescent materials can only emit light with a particular wavelength. In general, various phosphors with complementary spectral ranges are mixed to realize full-spectrum lighting. Therefore, the integration of luminescence at different wavebands in the single component matrix to obtain white emission is the optimal strategy for designing lighting materials. Thus, Sc-based double perovskite Cs2AgScCl6:xBi with adjustable free exciton and self-trapped exciton luminescence is synthesized by the vacuum evaporation assisted synthetic method. This perovskite can be used as white phosphor to assemble a high-quality white lighting device. Density functional theory calculations have revealed that the introduction of Bi optimizes the electron transfer and suppresses the defects in Cs2AgScCl6, which leads to excellent luminescent performance in a broad wavelength range. This work provides a new concept and strategy for the design and preparation of rare-earth optical perovskites in the future. © 2022 Wiley-VCH GmbH.

AB - Most luminescent materials can only emit light with a particular wavelength. In general, various phosphors with complementary spectral ranges are mixed to realize full-spectrum lighting. Therefore, the integration of luminescence at different wavebands in the single component matrix to obtain white emission is the optimal strategy for designing lighting materials. Thus, Sc-based double perovskite Cs2AgScCl6:xBi with adjustable free exciton and self-trapped exciton luminescence is synthesized by the vacuum evaporation assisted synthetic method. This perovskite can be used as white phosphor to assemble a high-quality white lighting device. Density functional theory calculations have revealed that the introduction of Bi optimizes the electron transfer and suppresses the defects in Cs2AgScCl6, which leads to excellent luminescent performance in a broad wavelength range. This work provides a new concept and strategy for the design and preparation of rare-earth optical perovskites in the future. © 2022 Wiley-VCH GmbH.

KW - exciton regulating

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KW - full spectra

KW - rare-earth perovskites

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