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Efficient broadband near-infrared phosphor Sr2ScSbO6:Cr3+ for solar-like lighting

高效宽带近红外发光材料Sr2ScSbO6:Cr3+及其在类太 阳光源中的应用

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Abstract

for healthy lighting, daily lighting that considers both visible light and near-infrared (NIR) light is necessary. However, at ∼900 nm, the extensively used solar-like phosphor-converted light-emitting diodes (pc-LEDs) are limited by a lack of high-performance NIR luminescent materials. We report a broadband NIR phosphor Sr2ScSbO6:Cr3+ with a double perovskite-type structure, thus simultaneously demonstrating high luminescence efficiency and good thermal stability. Under 550-nm excitation, Sr2ScSbO6:Cr3+ demonstrates broadband NIR emission centered at ∼890nm with luminescence internal/external efficiencies of 82.0%/35.7%, respectively. Furthermore, the luminescence integrated intensity at 430 K remains at ∼66.4% of the initial intensity. We successfully fabricated pc-LED devices using a 465-nm-sized blue chip and other commercial phosphors, presenting a relatively complete solar-like spectrum from blue to NIR light and is expected to be used in solar-like lighting.

摘要

类太阳光光源包含可见光和近红外(NIR)光, 在健康照明等领域 具有重要的应用. 然而众多应用却由于目前缺乏具有高效率和高发光 热稳定的900 nm附近的NIR发光材料而受到限制. 在此, 我们报道了一 种具有双钙钛矿型结构的宽带NIR荧光粉Sr2ScSbO6:Cr3+, 其具有高发 光效率和良好的发光热稳定性. 在550 nm光激发下, 该材料具有以 ~890 nm为中心的宽带NIR发射, 发光内/外量子效率分别为82.0%/35.7%. 此外, 材料显示出优良的发光热稳定性, 在430 K下的发光积分 强度保持初始强度的66.4%. 结合465 nm蓝光芯片和其他商用荧光粉, 我们成功制作了荧光粉转换发光二极管器件, 呈现出从蓝色到近红外 光的相对完整的类太阳光谱, 有望用于日常照明和类太阳光谱发光器 件.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (51972020 and 51832005). We thank Dr. Tianliang Zhou from Xiamen University for IQE/EQE measurements.

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Authors and Affiliations

  1. The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Meng Zhao  (赵甍), Shengqiang Liu  (刘胜强), Hao Cai  (蔡昊), Fangyi Zhao  (赵芳仪), Zhen Song  (宋振) & Quanlin Liu  (刘泉林)

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  1. Meng Zhao  (赵甍)
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  2. Shengqiang Liu  (刘胜强)
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  3. Hao Cai  (蔡昊)
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  4. Fangyi Zhao  (赵芳仪)
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  5. Zhen Song  (宋振)
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  6. Quanlin Liu  (刘泉林)
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Contributions

Liu Q and Zhao M conceived the idea; Liu Q supervised the project; Zhao M carried out materials synthesis, device fabrication, and most of the measurements. Cai H and Zhao F participated in part of the experiments; Zhao M analyzed the data and charted the figures and table. Liu Q, Song Z, and Liu S revised the paper. All authors discussed the results and revised the manuscript.

Corresponding authors

Correspondence to Zhen Song  (宋振) or Quanlin Liu  (刘泉林).

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Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary information

Supporting data are available in the online version of the paper.

Meng Zhao is currently a PhD candidate in materials science and engineering under the supervision of Prof. Quanlin Liu at the University of Science and Technology Beijing (USTB). His research focuses on Cr-doped perovskite-type oxide luminescent materials.

Quanlin Liu completed his PhD degree in condensed matter physics in 1998 at the Institute of Physics, Chinese Academy of Sciences (IOP CAS). From 1998 to 2005, he worked as an assistant and associate professor at IOP CAS, including working as a Japan Society for the Promotion (JSPS) fellow at the National Institute for Materials Science, Japan (2001–2003). Since 2005, he has been a full professor in materials science at the USTB. His current research interests primarily focus on luminescent materials.

Zhen Song received his PhD degree from the School of Materials Science and Engineering, USTB, in 2014. He is currently an associate professor at the Department of Materials Science and Engineering, USTB. His research interests focus on solid-state luminescence theory and rare-earth-doped luminescent materials.

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Zhao, M., Liu, S., Cai, H. et al. Efficient broadband near-infrared phosphor Sr2ScSbO6:Cr3+ for solar-like lighting. Sci. China Mater. 65, 748–756 (2022). https://doi.org/10.1007/s40843-021-1785-6

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  • DOI: https://doi.org/10.1007/s40843-021-1785-6

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