Site Occupancy and Near‐Infrared Luminescence in Ca<sub>3</sub>Ga<sub>2</sub>Ge<sub>3</sub>O<sub>12</sub>: Cr<sup>3+</sup> Persistent Phosphor

DOI Web Site Web Site 被引用文献1件
  • Huihong Lin
    Department of Applied Physics The Hong Kong Polytechnic University Hong Kong China
  • Gongxun Bai
    Department of Applied Physics The Hong Kong Polytechnic University Hong Kong China
  • Ting Yu
    State Key Laboratory of Luminescence Materials and Devices Institute of Optical Communication Materials South China University of Technology Guangzhou 510641 China
  • Ming‐Kiu Tsang
    Department of Applied Physics The Hong Kong Polytechnic University Hong Kong China
  • Qinyuan Zhang
    State Key Laboratory of Luminescence Materials and Devices Institute of Optical Communication Materials South China University of Technology Guangzhou 510641 China
  • Jianhua Hao
    Department of Applied Physics The Hong Kong Polytechnic University Hong Kong China

書誌事項

公開日
2017-07-11
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/adom.201700227
公開者
Wiley

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説明

<jats:p>The near‐infrared (NIR) luminescence properties of Cr<jats:sup>3+</jats:sup> activated Ca<jats:sub>3</jats:sub>Ga<jats:sub>2</jats:sub>Ge<jats:sub>3</jats:sub>O<jats:sub>12</jats:sub> (CGGG) are studied under ultraviolet and visible light excitation. Three types of Cr<jats:sup>3+</jats:sup> centers associated with <jats:sup>4</jats:sup>T<jats:sub>2</jats:sub>–<jats:sup>4</jats:sup>A<jats:sub>2</jats:sub> transition resulting in the emissions located at 650–1100 nm are identified in all Cr<jats:sup>3+</jats:sup>‐doped samples. Thanks to the occupancy of three nonequivalent sites in CGGG, NIR luminescence is observed peaking at about 749, 803, and 907 nm, respectively. The influence of crystal field on site occupancy is studied, the relation between site occupancy and the NIR luminescence is addressed, and the energy transfer process among Cr<jats:sup>3+</jats:sup> sites and the decay behaviors for Cr<jats:sup>3+</jats:sup> in different sites are evaluated. It is found that a superior NIR/persistent luminescence comes from the traps that Cr<jats:sup>3+</jats:sup> enters the Ga<jats:sup>3+</jats:sup> site. The results are of benefit to investigate Cr<jats:sup>3+</jats:sup>‐activated persistent phosphors.</jats:p>

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