TY - JOUR
T1 - Efficient Solar Spectrum-Like White-Light Emission in Zinc-Based Zero-Dimensional Hybrid Metal Halides
AU - He, Shihui
AU - Hao, Shiqiang
AU - Fan, Liubing
AU - Liu, Kunjie
AU - Cai, Chuxin
AU - Wolverton, Christopher
AU - Zhao, Jing
AU - Liu, Quanlin
N1 - Funding Information:
This work was supported by the National Key Research and Development Program of China (No. 2021YFA0718900). This work was also supported by the National Natural Science Foundation of China (52272133 and 51972021) and Fundamental Research Funds for the Central Universities FRF‐IDRY‐GD21‐005. S.Hao and C.W. (DFT calculations) acknowledge support from the Department of Energy, Office of Science, Basic Energy Sciences under Grant DE‐SC0014520.
Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023
Y1 - 2023
N2 - Organic–inorganic metal halides (OIMHs) with high-efficiency solar spectrum-like emission are attracting broad and current interest. Here, five 0D Zn-based hybrid halides are synthesized based on aromatic organic cations with different carbon-chain lengths: C6H5CH2NH3+ (PMA+) and C6H5(CH2)4NH3+ (PBA+). (PMA)2ZnCl4 exhibits the highest photoluminescence quantum yield of 37.2% of reported Zn-based white-emission OIMHs. The emission spectrum of (PBA)2ZnI4 indicates a color rendering index of 98, which is the highest among single-component white-light-emitting phosphors. Spectral characterizations and density functional theory calculations demonstrate that the extremely broad emission of (PBA)2ZnI4 originates from the synergistic emission of organic cations and self-trapped excitons. The optical properties of the obtained (PMA)2ZnBr4, (PMA)2ZnI4·H2O, and (PBA)2ZnCl4 are also characterized for comparison, and with the same organic cations, the PLQY decreases from chloride to bromide to iodide. This work demonstrates that the selection of appropriate organics and halogens can enable fine tuning of single-component white-light emission, satisfying varying needs for solid-state lighting.
AB - Organic–inorganic metal halides (OIMHs) with high-efficiency solar spectrum-like emission are attracting broad and current interest. Here, five 0D Zn-based hybrid halides are synthesized based on aromatic organic cations with different carbon-chain lengths: C6H5CH2NH3+ (PMA+) and C6H5(CH2)4NH3+ (PBA+). (PMA)2ZnCl4 exhibits the highest photoluminescence quantum yield of 37.2% of reported Zn-based white-emission OIMHs. The emission spectrum of (PBA)2ZnI4 indicates a color rendering index of 98, which is the highest among single-component white-light-emitting phosphors. Spectral characterizations and density functional theory calculations demonstrate that the extremely broad emission of (PBA)2ZnI4 originates from the synergistic emission of organic cations and self-trapped excitons. The optical properties of the obtained (PMA)2ZnBr4, (PMA)2ZnI4·H2O, and (PBA)2ZnCl4 are also characterized for comparison, and with the same organic cations, the PLQY decreases from chloride to bromide to iodide. This work demonstrates that the selection of appropriate organics and halogens can enable fine tuning of single-component white-light emission, satisfying varying needs for solid-state lighting.
KW - color rendering index
KW - organic–inorganic metal halides
KW - white light emission
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U2 - 10.1002/adom.202300218
DO - 10.1002/adom.202300218
M3 - Article
AN - SCOPUS:85154040516
SN - 2195-1071
JO - Advanced Optical Materials
JF - Advanced Optical Materials
ER -