Nature Photonics ( IF 32.3 ) Pub Date : 2024-01-11 , DOI: 10.1038/s41566-023-01358-y
Xinyuan Du , Shan Zhao , Lu Wang , Haodi Wu , Fan Ye , Kan-Hao Xue , Shaoqian Peng , Jianlong Xia , Ziru Sang , Dongdong Zhang , Zuping Xiong , Zhiping Zheng , Ling Xu , Guangda Niu , Jiang Tang
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Efficient and fast scintillators are in high demand in a variety of fields, such as medical diagnostics, scientific instruments and high-energy physics. However, the trade-off between high scintillation efficiency and fast timing properties is a common challenge facing almost all scintillators. To overcome this limitation, we have developed a strategy for organic scintillators by directing all hot excitons into fast singlet emission states without involving the lowest triplet states. Our scintillator, 1,1,2,2-tetrakis(4-bromophenyl)ethylene, shows an ultrafast radiative lifetime of 1.79 ns and a light yield of ∼34,600 photons per MeV, exhibiting an excellent combination of high light yield and short decay time. Our work provides a method to design efficient and ultrafast scintillators, and paves the way towards exciting applications for ultrafast detection and imaging.
中文翻译:
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通过热激子操控实现高效超快有机闪烁体
医疗诊断、科学仪器和高能物理等多个领域对高效、快速的闪烁体有很高的需求。然而,高闪烁效率和快速定时特性之间的权衡是几乎所有闪烁体面临的共同挑战。为了克服这一限制,我们开发了一种有机闪烁体策略,将所有热激子引导至快速单线态发射态,而不涉及最低三线态。我们的闪烁体 1,1,2,2-四(4-溴苯基)乙烯具有 1.79 ns 的超快辐射寿命和每 MeV约34,600 个光子的光产额,表现出高光产额和短衰减时间的出色结合。我们的工作提供了一种设计高效、超快闪烁体的方法,并为超快检测和成像的令人兴奋的应用铺平了道路。