期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 11, 期 23, 页码 10164-10172出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.0c03079
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资金
- National Science Foundation of China [51832005, 51561135015, 51602271]
- Natural Science Foundation of Fujian Province [2019J05041]
- Double-First Class Foundation of Materials and Intelligent Manufacturing Discipline of Xiamen University
Low-dimensional metal halide hybrids (OIMHs) have recently been explored as single-component white-light emitters for use in solid-state lighting. However, it still remains challenging to realize tunable white-light emission in lead-free zero-dimensional (0D) hybrid system. Here, a combination strategy has been proposed through doping Sb3+ enabling and balancing multiple emission centers toward the multiband warm white light. We first synthesized a new lead-free 0D (C8NH12)(6)InBr9 center dot H2O single crystal, in which isolated [InBr6](3-) octahedral units are separated by large organic cations [C8NH12](+). (C8NH12)(6)InBr9 center dot H2O exhibits dual-band emissions with one intense cyan emission and a weak red emission tail. The low-energy ultrabroadband red emission tail can be greatly enhanced by the Sb3+ doping. Experimental data and first-principles calculations reveal that the original dominant cyan emission is originated from the organic cations [C8NH12](+) and that the broadband red emission is ascribed to self-trapped excitons in [In(Sb)Br-6](3-). When the Sb concentration is 0.1%, a single-component warm white-light emission with a photoluminescence quantum efficiency of 23.36%, correlated color temperature of 3347 K, and a color rendering index up to 84 can be achieved. This work represents a significant step toward the realization of single-component white-light emissions in environmental-friendly, high-performance 0D metal halide light-emitting materials.
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