Efficient and stable emission of warm-white light from lead-free halide double perovskites

Jiajun Luo, Xiaoming Wang, Shunran Li, Jing Liu, Yueming Guo, Guangda Niu, Li Yao, Yuhao Fu, Liang Gao, Qingshun Dong, Chunyi Zhao, Meiying Leng, Fusheng Ma, Wenxi Liang, Liduo Wang, Shengye Jin, Junbo Han, Lijun Zhang, Joanne Etheridge, Jianbo Wang & 3 others Yanfa Yan, Edward H. Sargent, Jiang Tang

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Lighting accounts for one-fifth of global electricity consumption1. Single materials with efficient and stable white-light emission are ideal for lighting applications, but photon emission covering the entire visible spectrum is difficult to achieve using a single material. Metal halide perovskites have outstanding emission properties2,3; however, the best-performing materials of this type contain lead and have unsatisfactory stability. Here we report a lead-free double perovskite that exhibits efficient and stable white-light emission via self-trapped excitons that originate from the Jahn-Teller distortion of the AgCl6 octahedron in the excited state. By alloying sodium cations into Cs2AgInCl6, we break the dark transition (the inversion-symmetry-induced parity-forbidden transition) by manipulating the parity of the wavefunction of the self-trapped exciton and reduce the electronic dimensionality of the semiconductor4. This leads to an increase in photoluminescence efficiency by three orders of magnitude compared to pure Cs2AgInCl6. The optimally alloyed Cs2(Ag0.60Na0.40)InCl6 with 0.04 per cent bismuth doping emits warm-white light with 86 ± 5 per cent quantum efficiency and works for over 1,000 hours. We anticipate that these results will stimulate research on single-emitter-based white-light-emitting phosphors and diodes for next-generation lighting and display technologies.

Original languageEnglish
Pages (from-to)541-545
Number of pages5
JournalNature
Volume563
Issue number7732
DOIs
Publication statusPublished - 1 Nov 2018

Cite this

Luo, J., Wang, X., Li, S., Liu, J., Guo, Y., Niu, G., ... Tang, J. (2018). Efficient and stable emission of warm-white light from lead-free halide double perovskites. Nature, 563(7732), 541-545. https://doi.org/10.1038/s41586-018-0691-0
Luo, Jiajun ; Wang, Xiaoming ; Li, Shunran ; Liu, Jing ; Guo, Yueming ; Niu, Guangda ; Yao, Li ; Fu, Yuhao ; Gao, Liang ; Dong, Qingshun ; Zhao, Chunyi ; Leng, Meiying ; Ma, Fusheng ; Liang, Wenxi ; Wang, Liduo ; Jin, Shengye ; Han, Junbo ; Zhang, Lijun ; Etheridge, Joanne ; Wang, Jianbo ; Yan, Yanfa ; Sargent, Edward H. ; Tang, Jiang. / Efficient and stable emission of warm-white light from lead-free halide double perovskites. In: Nature. 2018 ; Vol. 563, No. 7732. pp. 541-545.
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title = "Efficient and stable emission of warm-white light from lead-free halide double perovskites",
abstract = "Lighting accounts for one-fifth of global electricity consumption1. Single materials with efficient and stable white-light emission are ideal for lighting applications, but photon emission covering the entire visible spectrum is difficult to achieve using a single material. Metal halide perovskites have outstanding emission properties2,3; however, the best-performing materials of this type contain lead and have unsatisfactory stability. Here we report a lead-free double perovskite that exhibits efficient and stable white-light emission via self-trapped excitons that originate from the Jahn-Teller distortion of the AgCl6 octahedron in the excited state. By alloying sodium cations into Cs2AgInCl6, we break the dark transition (the inversion-symmetry-induced parity-forbidden transition) by manipulating the parity of the wavefunction of the self-trapped exciton and reduce the electronic dimensionality of the semiconductor4. This leads to an increase in photoluminescence efficiency by three orders of magnitude compared to pure Cs2AgInCl6. The optimally alloyed Cs2(Ag0.60Na0.40)InCl6 with 0.04 per cent bismuth doping emits warm-white light with 86 ± 5 per cent quantum efficiency and works for over 1,000 hours. We anticipate that these results will stimulate research on single-emitter-based white-light-emitting phosphors and diodes for next-generation lighting and display technologies.",
author = "Jiajun Luo and Xiaoming Wang and Shunran Li and Jing Liu and Yueming Guo and Guangda Niu and Li Yao and Yuhao Fu and Liang Gao and Qingshun Dong and Chunyi Zhao and Meiying Leng and Fusheng Ma and Wenxi Liang and Liduo Wang and Shengye Jin and Junbo Han and Lijun Zhang and Joanne Etheridge and Jianbo Wang and Yanfa Yan and Sargent, {Edward H.} and Jiang Tang",
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Luo, J, Wang, X, Li, S, Liu, J, Guo, Y, Niu, G, Yao, L, Fu, Y, Gao, L, Dong, Q, Zhao, C, Leng, M, Ma, F, Liang, W, Wang, L, Jin, S, Han, J, Zhang, L, Etheridge, J, Wang, J, Yan, Y, Sargent, EH & Tang, J 2018, 'Efficient and stable emission of warm-white light from lead-free halide double perovskites', Nature, vol. 563, no. 7732, pp. 541-545. https://doi.org/10.1038/s41586-018-0691-0

Efficient and stable emission of warm-white light from lead-free halide double perovskites. / Luo, Jiajun; Wang, Xiaoming; Li, Shunran; Liu, Jing; Guo, Yueming; Niu, Guangda; Yao, Li; Fu, Yuhao; Gao, Liang; Dong, Qingshun; Zhao, Chunyi; Leng, Meiying; Ma, Fusheng; Liang, Wenxi; Wang, Liduo; Jin, Shengye; Han, Junbo; Zhang, Lijun; Etheridge, Joanne; Wang, Jianbo; Yan, Yanfa; Sargent, Edward H.; Tang, Jiang.

In: Nature, Vol. 563, No. 7732, 01.11.2018, p. 541-545.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Efficient and stable emission of warm-white light from lead-free halide double perovskites

AU - Luo, Jiajun

AU - Wang, Xiaoming

AU - Li, Shunran

AU - Liu, Jing

AU - Guo, Yueming

AU - Niu, Guangda

AU - Yao, Li

AU - Fu, Yuhao

AU - Gao, Liang

AU - Dong, Qingshun

AU - Zhao, Chunyi

AU - Leng, Meiying

AU - Ma, Fusheng

AU - Liang, Wenxi

AU - Wang, Liduo

AU - Jin, Shengye

AU - Han, Junbo

AU - Zhang, Lijun

AU - Etheridge, Joanne

AU - Wang, Jianbo

AU - Yan, Yanfa

AU - Sargent, Edward H.

AU - Tang, Jiang

PY - 2018/11/1

Y1 - 2018/11/1

N2 - Lighting accounts for one-fifth of global electricity consumption1. Single materials with efficient and stable white-light emission are ideal for lighting applications, but photon emission covering the entire visible spectrum is difficult to achieve using a single material. Metal halide perovskites have outstanding emission properties2,3; however, the best-performing materials of this type contain lead and have unsatisfactory stability. Here we report a lead-free double perovskite that exhibits efficient and stable white-light emission via self-trapped excitons that originate from the Jahn-Teller distortion of the AgCl6 octahedron in the excited state. By alloying sodium cations into Cs2AgInCl6, we break the dark transition (the inversion-symmetry-induced parity-forbidden transition) by manipulating the parity of the wavefunction of the self-trapped exciton and reduce the electronic dimensionality of the semiconductor4. This leads to an increase in photoluminescence efficiency by three orders of magnitude compared to pure Cs2AgInCl6. The optimally alloyed Cs2(Ag0.60Na0.40)InCl6 with 0.04 per cent bismuth doping emits warm-white light with 86 ± 5 per cent quantum efficiency and works for over 1,000 hours. We anticipate that these results will stimulate research on single-emitter-based white-light-emitting phosphors and diodes for next-generation lighting and display technologies.

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