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Abstract：
Organic scintillators, materials with the ability to exhibit luminescence when exposed to X-rays, have aroused increasing interest in recent years. However, the enhancement of radioluminescence and improving X-ray absorption of organic scintillators lie in the inherent dilemma, due to the waste of triplet excitons and weak X-ray absorption during scintillation. Here, we employ halogenated thermally activated delayed fluorescence materials to improve the triplet exciton utilization and X-ray absorption simultaneously, generating efficient scintillation with a low detection limit, which is one order of magnitude lower than the dosage for X-ray medical diagnostics. Through experimental study and theoretical calculation, we reveal the positive role of X-ray absorption, quantum yields of prompt fluorescence and intersystem crossing in promoting the radioluminescence intensity. This finding offers an opportunity to design diverse types of organic scintillators and expands the applications of thermally activated delayed fluorescence.
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RESEARCH
ISSN： 2096-5168
Year： 2023
Volume： 6
8 . 5
JCR@2023
8 . 5 0 0
JCR@2023
ESI Discipline： MULTIDISCIPLINARY;
ESI HC Threshold：42
JCR Journal Grade：1
CAS Journal Grade：2
Cited Count：
WoS CC Cited Count： 10
SCOPUS Cited Count： 10
ESI Highly Cited Papers on the List： 0 Unfold All
WanFang Cited Count：
Chinese Cited Count：
30 Days PV： 2
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