TY - JOUR
T1 - Halogenated Thermally Activated Delayed Fluorescence Materials for Efficient Scintillation
AU - Wang, Xiao
AU - Niu, Guowei
AU - Zhou, Zixing
AU - Song, Zhicheng
AU - Qin, Ke
AU - Yao, Xiaokang
AU - Yang, Zhijian
AU - Wang, Xiaoze
AU - Wang, He
AU - Liu, Zhuang
AU - Yin, Chengzhu
AU - Ma, Huili
AU - Shen, Kang
AU - Shi, Huifang
AU - Yin, Jun
AU - Chen, Qiushui
AU - An, Zhongfu
AU - Huang, Wei
N1 - Funding Information:
Funding: This work was financially supported by the National Key R&D Program of China (grant no. 2020YFA0709900), National Basic Science Center of Flexible Electronics (62288102), the National Natural Science Foundation of China (62134007, 21975120, 21875104, and 21973043), the Primary Research and Development Plan of Jiangsu Province (BE2016770). Author Contributions: Xiao Wang, G.N., Q.C., Z.A., and W.H. conceived the experiments. Xiao Wang, Q.C., Z.A., and W.H. prepared the paper. Xiao Wang, G.N., Z.Z., X.Y., H.W., Z.L., K.S., and H.S. were primarily responsible for the experiments. G.N., Z.Y., and Xiaoze Wang were responsible for the X-ray-related experiments and applications. Z.S. and C.Y. performed quantum yield and lifetime measurements. K.Q. and H.M. contributed to time-dependent density functional theory calculations. J.Y. gave suggestions of conceptual ideas and radioluminescence mechanism. All authors contributed to the data analyses. Competing interests: The authors declare that they have no competing interests.
Publisher Copyright:
© 2023 Xiao Wang et al.
PY - 2023/2
Y1 - 2023/2
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85152143638&partnerID=8YFLogxK
U2 - 10.34133/research.0090
DO - 10.34133/research.0090
M3 - Journal article
AN - SCOPUS:85152143638
SN - 2096-5168
VL - 6
JO - Research
JF - Research
M1 - 0090
ER -