journal article·2023-10-04

Band Gap and Defect Engineering Enhanced Scintillation from Ce3+-Doped Nanoglass Containing Mixed-Type Fluoride Nanocrystals

Chengxi Luo, Yue Jing, Zhehao Hua, Zexuan Sui, Ci Wang, Peng Hu, Lirong Zheng, Sen Qian, Luyun Yang, Xinyuan Sun, Gao Tang, Hua Cai, Yao Zhu, Huiyun Ban, Jifeng Han, Zhile Wang, Xvsheng Qiao, Jing Ren, Jianzhong Zhang

ACS Applied Materials & Interfaces· Volume 15· Issue 39
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Abstract

Much can be learned from the research and development of scintillator crystals for improving the scintillation performance of glasses. Relying on the concept of “embedding crystalline order in glass”, we have demonstrated that the scintillation properties of Ce 3+ -doped nanoglass composites (nano-GCs) can be optimized via the synergistic effects of Gd 3+ -sublattice sensitization and band-gap engineering. The nano-GCs host a large volume fraction of KY x Gd 1– x F 4 mixed-type fluoride nanocrystals (NCs) and still retain reasonably good transparency at Ce 3+ -emitting wavelengths. The light yield of 3455 ± 20 ph/MeV is found, which is the largest value ever reported in fluoride NC-embedded nano-GCs. A comprehensive study is given on the highly selective doping of Ce 3+ in the NCs and its positive effect on the scintillation properties. The favorable influence of the Y 3+ /Gd 3+ mixing on the suppression of defects is accounted for by density functional theory and borne out experimentally. As a proof-of-concept, X-ray imaging with a good spatial resolution (7.9 lp/mm) is demonstrated by employing Ce 3+ -doped nano-GCs. The superior radiation hardness, repeatability, and thermal stability of the designed scintillators bode well for their long-term practical applications.
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Research context

OpenAlex topics: Radiation Detection and Scintillator Technologies · Luminescence Properties of Advanced Materials · Digital Radiography and Breast Imaging

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001, China

Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Department of Physics, Jinggangshan University, Ji’an 343009, China

College of Materials and Chemistry, China Jiliang University, Hangzhou 310018, China

China Building Materials Academy, Beijing 100024, China

Beijing Glass Research Institute, Beijing 101111, China

Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610065, China

Department of Electronic Science and Technology, Harbin Institute of Technology, Harbin 150001, China

School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027 China

Funding

State Key Laboratory of Particle Detection and Electronics · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Higher Education Discipline Innovation Project

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