Organic phosphors with bright triplet excitons for efficient X-ray-excited luminescence

Xiao Wang, Huifang Shi, Huili Ma, Wenpeng Ye, Lulu Song, Jie Zan, Xiaokang Yao, Xiangyu Ou, Guohui Yang, Zhu Zhao, Manjeet Singh, Chongyang Lin, He Wang, Wenyong Jia, Qian Wang, Jiahuan Zhi, Chaomin Dong, Xueyan Jiang, Yongan Tang, Xiaoji XieYang (Michael) Yang, Jianpu Wang, Qiushui Chen, Yu Wang, Huanghao Yang, Guoqing Zhang, Zhongfu An, Xiaogang Liu, Wei Huang

Research output: Contribution to journalArticlepeer-review

250 Scopus citations

Abstract

Materials that exhibit X-ray-excited luminescence have great potential in radiation detection, security inspection, biomedical applications and X-ray astronomy1,2,3,4,5. However, high-performance materials are almost exclusively limited to ceramic scintillators, which are typically prepared under high temperatures6. Herein we report metal-free organic phosphors based on a molecular design that supports efficient triplet exciton harvesting to enhance radioluminescence. These organic scintillators exhibit a detection limit of 33 nGy s–1, which is 167 times lower than the standard dosage for X-ray medical examination and we demonstrate their potential application in X-ray radiography. These findings provide a fundamental design principle and new route for the creation of promising alternatives to incumbent inorganic scintillators. Furthermore, they offer new opportunities for development of flexible, stretchable X-ray detectors and imagers for non-destructive radiography testing and medical imaging.
Original languageEnglish (US)
JournalNature Photonics
DOIs
StatePublished - Jan 11 2021
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2021-04-13
Acknowledged KAUST grant number(s): OSR-2018-CRG7-3736
Acknowledgements: This work is supported by the National Key R&D Program of China (grant no. 2020YFA0709900), the National Natural Science Foundation of China (grant nos. 21975120, 21875104, 91833304, 21973043, 51673095 and 61935017), the Joint Research Funds of Department of Science and Technology of Shaanxi Province and Northwestern Polytechnical University (grant no. 2020GXLH-Z-006), Natural Science Fund for Distinguished Young Scholars of Jiangsu Province (grant no. BK20180037), China National Postdoctoral Program for Innovative Talents (grant no. BX20200278), Projects of International Cooperation and Exchanges NSFC (grant no. 51811530018), the Fundamental Research Funds for the Central Universities, Agency for Science, Technology and Research (A*STAR) under its AME program (grant nos. A1883c0011 and A1983c0038), and the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under award no. OSR-2018-CRG7-3736.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials

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