The incorporation of Sc can stabilize calcite-phase LuBO:Ce 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)BO:Ce was rapidly synthesized in batches a high-throughput sol-gel method. The aliovalent substitution of Lu 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)BO: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, 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)BO:Ce single crystals and thin films and their application in the scintillation field.
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