期刊
ADVANCED OPTICAL MATERIALS
卷 9, 期 19, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202100689
关键词
blue emitter; dual emission; halide double perovskites; Mn doping
资金
- China Postdoctoral Science Foundation [2020M682159]
- Dalian City Foundation for Science and Technology Innovation [2019J12GX031]
- Scientific Instrument Developing Project of the Chinese Academy of Sciences [YJKYYQ20190003]
Halide double perovskites, particularly Cs2NaScCl6, exhibit strong blue emission and high quantum efficiency, with excellent stability against heat and irradiation. Incorporating Mn2+ ions into the host perovskite results in interesting tunable dual broadband emission of slightly redshifted blue light and red light from Mn2+ d-d transitions. These findings demonstrate a new direction for high-efficiency, stable, and environmentally friendly perovskite light emitters.
Halide double perovskites have been regarded as promising alternatives to famous lead halide perovskites in the field of luminescent materials. However, the low-emission efficiency of pristine ones and the lack of efficient blue emitters remain considerable obstacles for their applications in light-emitting devices. Here, an air-stable, all-inorganic Sc-based double perovskite Cs2NaScCl6 is reported, which exhibits strong blue emission peaking at 445 nm with an averaged quantum yield of 29.05% (the highest reported value for pristine halide double perovskites). The rare-earth double perovskite also shows excellent stability against heat and irradiation. Bulk perovskite Cs2NaScCl6 can be an effective host to incorporate Mn2+ ions, yielding interesting tunable dual broadband emission, slightly redshifted blue emission (450 nm) from the host and red emission (635 nm) from Mn2+ d-d transitions. These findings present a new direction toward the design of high-efficiency, stable, and environmentally friendly perovskite light emitters.
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