1. Cs2MnCl4:Eu2+: A Near-Violet Light-Triggered Single-Component White Light Emitter
- Author
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Hou, Jingshan, Wu, Jianghua, Fang, Yongzheng, Wei, Yi, Dong, Langping, Zhang, Ganghua, Liu, Yufeng, Chen, Haijie, and Li, Guogang
- Abstract
Single-component white-light luminescent materials are considered an economical and facile choice for phosphor-converted white light-emitting diodes (pc-WLEDs). Here, a new single-component white-light-emitting material Cs2MnCl4:Eu2+based on the combination of a lead-free halide structure and a rare-earth ion is first reported. Benefiting from the smart dilution–sensitization design strategy, white light composed of dual broad emission originating from Eu2+(blue light, 444 nm, 4f65d1→ 4f7) and Mn2+(yellow light, 566 nm, 4T1g→ 6A1g) was successfully realized under near-ultraviolet light (404 nm) radiation with a high photoluminescence quantum yield of 66%. Based on the single-source Cs2MnCl4:Eu2+phosphor, a pc-WLEDs device with “eye-friendly” white light production was successfully fabricated. The pc-WLEDs exhibit suitable color coordinates of (0.3294, 0.2746) and a high color rendering index of 82.3, demonstrating the potential in the future health-conscious illumination application by reducing the risk of eye strain and high-energy blue-light damage. This work achieves a new single-component white-light-emitting Mn-based halide phosphor and provides a new path for the design of single-component white light sources in Mn-based halides.
- Published
- 2024
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