1. Significant enhancement of scintillation performance by inducing oxygen vacancies in alkali metal ion (A+ = Li+, Na+, K+)-incorporated (Lu, Sc)BO3:Ce.
- Author
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Yang, Yun-Ling, Chen, Jia-Xuan, Guo, Fan, Huang, Meng, Liang, Shan-Shan, Li, Qian-Li, Hu, Jian-Feng, Zhao, Jing-Tai, Gao, Xing-Yu, Fu, Ya-Nan, Lin, Hui, Cheng, Shuai, and Zhang, Zhi-Jun
- Subjects
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ALKALI metal ions , *ALKALI metals , *CERIUM oxides , *X-ray detection , *SINGLE crystals , *THIN films , *CHARGE carriers - Abstract
The incorporation of Sc3+ can stabilize calcite-phase LuBO3:Ce3+ to grow large-sized single crystals but leads to the significant degradation of scintillation performance. In the present work, alkali metal ion (A+ = Li+, Na+, K+)-incorporated (Lu, A, Sc)BO3:Ce was rapidly synthesized in batches via a high-throughput sol–gel method. The aliovalent substitution of Lu3+ with A+ is balanced by the generation of oxygen vacancies by forming complexes. Thanks to the increased oxygen vacancies, the luminescence and XEL intensity of (Lu, Li, Sc)BO3:Ce are significantly enhanced by 2.2 times and 1.9 times, respectively. Further, the incorporation of A+ is attributed to the improved transition efficiency of charge carriers. The prepared scintillation screen fabricated with LASBO:Ce and PMMA shows that the spatial resolution can reach 8.6 lp mm−1, indicating its potential application in efficient and low-cost non-destructive X-ray detection. This work is of great significance in improving the luminescence and scintillation performance of (Lu, Sc)BO3:Ce single crystals and thin films and their application in the scintillation field. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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