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K2LiScF6:Cr3+/Mn4+ fluoride phosphor with enhanced broadband emission for NIR pc-LEDs.
Wang, Yunfeng; Feng, Jiajun; Chen, Pengyun; Huo, Jiansheng; Zhang, Qiuhong; Liu, Shuanglai; Tang, Mengyuan; Li, Junhao; Zhou, Jianbang.
Afiliação
  • Wang Y; School of Information Engineering, Nanyang Institute of Technology, Nanyang 473004, P.R. China.
  • Feng J; School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, P.R. China. fengjiajun@zqu.edu.cn.
  • Chen P; Guangdong Provincial Key Laboratory of Rare Earth Development and Application, Institute of Resources Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510650, P.R. China. junhaoli0317@qq.com.
  • Huo J; Guangdong Provincial Key Laboratory of Rare Earth Development and Application, Institute of Resources Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510650, P.R. China. junhaoli0317@qq.com.
  • Zhang Q; Guangdong Provincial Key Laboratory of Rare Earth Development and Application, Institute of Resources Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510650, P.R. China. junhaoli0317@qq.com.
  • Liu S; School of Information Engineering, Nanyang Institute of Technology, Nanyang 473004, P.R. China.
  • Tang M; School of Information Engineering, Nanyang Institute of Technology, Nanyang 473004, P.R. China.
  • Li J; Guangdong Provincial Key Laboratory of Rare Earth Development and Application, Institute of Resources Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510650, P.R. China. junhaoli0317@qq.com.
  • Zhou J; Guangdong Provincial Key Laboratory of Rare Earth Development and Application, Institute of Resources Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510650, P.R. China. junhaoli0317@qq.com.
Dalton Trans ; 52(29): 10071-10078, 2023 Jul 25.
Article em En | MEDLINE | ID: mdl-37417820
Trivalent chromium ion-activated broadband near-infrared (NIR) luminescence materials have shown great application prospects as next-generation NIR light sources, but improvement of the luminescence efficiency remains a challenge. Herein, novel K2LiScF6:Cr3+ and K2LiScF6:Cr3+/Mn4+ broadband fluoride NIR phosphors are designed and prepared by a combination of hydrothermal and cation exchange methods for the first time. The crystal structure and photoluminescence (PL) properties of K2LiScF6:Cr3+ are studied in detail, which shows strong absorption in the blue light region (λex = 432 nm) and broadband NIR emission (λem = 770 nm) with a PL quantum efficiency of 77.6%. More importantly, the NIR emission of Cr3+ can be enhanced by co-doping with Mn4+, which may provide an alternative way for improving the PL intensity of Cr3+-activated broadband NIR phosphors. Finally, a NIR phosphor-converted LED (pc-LED) device is fabricated using the as-prepared NIR phosphor and its application in bio-imaging and night vision has been evaluated.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article