A Super‐Bright and Temperature‐Inert Au Complex Scintillator With Thermally Stimulated Delayed Phosphorescence Characteristic
Abstract
ABSTRACT Scintillators serve as crucial core materials in high‐energy radiation sensors. Molecule‐based scintillators, one of the important kind of scintillators, have demonstrated outstanding advantages, such as high water‐oxygen stability, low cost, and low toxicity. However, limited exciton utilization and luminescence efficiency have an impact on the radioluminescence properties of materials, severely limiting the development of molecule‐based scintillators. In this work, the first thermally stimulated delayed phosphorescence (TSDP) molecule‐based scintillator ( Au(TFPP) 3 ) was reported. Spin‐allowed reverse internal conversion (RIC) of triplet excitons occurs in the TSDP process, leading to efficient utilization of thermally sensitive triplet excitons and overcoming the significant temperature effect of scintillators. As a result, Au(TFPP) 3 not only has an ultrahigh photoluminescence quantum yield (PLQY) exceeding 99% but also has an excellent light yield (LY) as high as 99475 ± 275 photons MeV −1 . More importantly, all these luminescence properties are temperature independent over a very wide range from 100 to 370 K. The super‐bright and temperature‐inert characteristics render Au(TFPP) 3 highly suitable for ionising radiation detection, and Au(TFPP) 3 has been effectively applied in low‐dose x‐ray variable‐temperature imaging and α/β particle detection.
Article Details
Authors (11)
Qiu‐Chen Peng
Tianjian Laboratory of Advanced Biomedical Sciences Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials Ministry of Education College of Chemistry Zhengzhou University Zhengzhou 450001 China
You‐Song Hu
Tianjian Laboratory of Advanced Biomedical Sciences Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials Ministry of Education College of Chemistry Zhengzhou University Zhengzhou 450001 China
Jia‐Wang Yuan
Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials Ministry of Education College of Chemistry Zhengzhou University Zhengzhou 450001 China
Jia‐Chen Zhang
Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials (Zhengzhou University) Ministry of Education Pingyuan Laboratory Zhengzhou University Zhengzhou China
Qi Yang
Yu‐Chen Han
Tianjian Laboratory of Advanced Biomedical Sciences Key Laboratory of Special Functional Molecular Materials Ministry of Education College of Chemistry Zhengzhou University Zhengzhou China
Zi‐Ying Gao
Tianjian Laboratory of Advanced Biomedical Sciences Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials Ministry of Education, College of Chemistry Zhengzhou University Zhengzhou 450001 China
Yu‐Bing Si
Tianjian Laboratory of Advanced Biomedical Sciences Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials Ministry of Education College of Chemistry Zhengzhou University Zhengzhou 450001 China
Qiang Tang
Kai Li
Shuang‐Quan Zang
Henan Key Laboratory of Crystalline Molecular Functional Materials Key Laboratory of Special Functional Molecular Materials (Zhengzhou University) Ministry of Education Pingyuan Laboratory Zhengzhou University Zhengzhou China