期刊
NANO LETTERS
卷 22, 期 12, 页码 5046-5054出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.2c00733
关键词
white light-emitting diodes; dual-band emission; Sb3+ ions; energy transfer; self-trapped excitons
类别
资金
- National Natural Science Foundation of China [12074347, 12004346, 61935009]
- Science Foundation for Distinguished Young Scholars of Henan Province [212300410019]
- Open Fund of the State Key Laboratory of Integrated Optoelectronics [IOSKL2020KF04]
This study presents a facile ion-doping technology to synthesize an efficient single-component white-light emitter Cs2ZrCl6:Sb. The introduction of Sb3+ ions stimulates the emission of singlet and triplet states, resulting in a high-quality white emission. Stable white-light-emitting diodes with a record half-lifetime of 2003 hours were successfully fabricated using Cs2ZrCl6:1.5%Sb as the down conversion phosphor. This research offers an effective ion-doping strategy for the design of single-component white-light emitters, making practical applications in lighting technologies possible.
The rapid development of solid-state lighting technology has attracted much attention for searching efficient and stable luminescent materials, especially the single-component white-light emitter. Here, we adopt a facile ion-doping technology to synthesize vacancy-ordered double perovskite Cs2ZrCl6:Sb. The introduction of Sb3+ ions with a 5s(2) active lone pair into Cs2ZrCl6 host stimulates the singlet (blue) and triplet (orange) states emission of Sb3+ ions, and their relative emission intensity can be tuned through the energy transfer from singlet to triplet states. Benefiting from the dual-band emission as a pair of perfect complementary colors, the optimum Cs2ZrCl6:1.5%Sb exhibits a high-quality white emission with a color rendering index of 96. By employing Cs2ZrCl6:1.5%Sb as the down conversion phosphor, stable single-component white light-emitting diodes with a record half-lifetime of 2003 h were further fabricated. This study puts forward an effective ion-doping strategy to design single-component white-light emitter, making practical applications of them in lighting technologies a real possibility.
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