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

doi:10.1038/s41586-018-0691-0

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

Journal Article · Wed Nov 07 00:00:00 EST 2018 · Nature (London)

DOI:https://doi.org/10.1038/s41586-018-0691-0· OSTI ID:1543773

Luo, Jiajun ^[1]; Wang, Xiaoming ^[2]; Li, Shunran ^[1]; Liu, Jing ^[1]; Guo, Yueming ^[3]; Niu, Guangda ^[1]; Yao, Li ^[1]; Fu, Yuhao ^[4]; Gao, Liang ^[5]; Dong, Qingshun ^[6]; Zhao, Chunyi ^[7]; Leng, Meiying ^[1]; Ma, Fusheng ^[6]; Liang, Wenxi ^[1]; Wang, Liduo ^[6]; Jin, Shengye ^[7]; Han, Junbo ^[1]; Zhang, Lijun ^[4]; Etheridge, Joanne ^[3]; Wang, Jianbo ^[8] more »

Huazhong Univ. of Science and Technology (HUST), Wuhan (China)
Univ. of Toledo, OH (United States)
Monash Univ., Melbourne, VIC (Australia)
Jilin Univ., Changchun (China). State Key Lab. of Superhard Materials
Huazhong Univ. of Science and Technology (HUST), Wuhan (China); Univ. of Toronto, ON (Canada)
Tsinghua Univ., Beijing (China)
Chinese Academy of Sciences, Dalian (China)
Wuhan Univ. (China)
Univ. of Toronto, ON (Canada)

Lighting accounts for one-fifth of global electricity consumption. 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 properties; 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 semiconductor. This leads to an increase in photoluminescence efficiency by three orders of magnitude compared to pure Cs₂AgInCl₆. The optimally alloyed Cs₂(Ag_0.60Na_0.40)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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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Center for Hybrid Organic-Inorganic Semiconductors for Energy (CHOISE); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States); Duke Univ., Durham, NC (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-05CH11231; EE0006712

OSTI ID:: 1543773

Journal Information:: Nature (London), Vol. 563, Issue 7732; ISSN 0028-0836

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 1217 works

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