Hou Jingshan, Wu Jianghua, Fang Yongzheng, Wei Yi, Dong Langping, Zhang Ganghua, Liu Yufeng, Chen Haijie, Li Guogang
School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China.
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China.
ACS Appl Mater Interfaces. 2024 Jun 12;16(23):30176-30184. doi: 10.1021/acsami.4c03066. Epub 2024 Jun 2.
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 CsMnCl:Eu 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 Eu (blue light, 444 nm, 4f5d → 4f) and Mn (yellow light, 566 nm, T → A) was successfully realized under near-ultraviolet light (404 nm) radiation with a high photoluminescence quantum yield of 66%. Based on the single-source CsMnCl:Eu 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.
单组分白光发光材料被认为是用于磷光体转换白光发光二极管（pc-WLEDs）的经济且简便的选择。在此，首次报道了一种基于无铅卤化物结构和稀土离子组合的新型单组分白光发光材料CsMnCl:Eu。受益于巧妙的稀释-敏化设计策略，在近紫外光（404 nm）辐射下成功实现了由Eu（蓝光，444 nm，4f5d→4f）和Mn（黄光，566 nm，T→A）发出的双重宽带发射组成的白光，其光致发光量子产率高达66%。基于单源CsMnCl:Eu荧光粉，成功制备了一种产生“护眼”白光的pc-WLEDs器件。该pc-WLEDs表现出合适的色坐标（0.3294，0.2746）和高达82.3的高显色指数，通过降低眼睛疲劳和高能蓝光损伤的风险，展示了其在未来注重健康照明应用中的潜力。这项工作实现了一种新型的单组分白光发光锰基卤化物荧光粉，并为锰基卤化物中单组分白光源的设计提供了一条新途径。
