Thermally activated delayed fluorescence (TADF) organic molecules for efficient X-ray scintillation and imaging

Ma, Wenbo; Su, Yirong; Zhang, Qisheng; Deng, Chao; Pasquali, Luca; Zhu, Wenjuan; Tian, Yue; Ran, Peng; Zeng, Chen; Yang, Gaoyuan; Liang, Guijie; Li, Tianyu; Zhu, Haiming; Huang, Peng; Zhong, Haizheng; Wang, Kangwei; Peng, Shaoqian; Xia, Jianlong; Liu, Huafeng; Liu, Xu; Yang, Yang Michael

doi:10.1038/s41563-021-01132-x

Cited by 246 publications

(221 citation statements)

References 46 publications

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“…Last but not least, thermally activated up-conversion of the triplet exciton may also find applications in other fields such as photocatalysis 102 and biomedical applications, 103 X-ray scintillation and radiation detection. 104…”

Section: Conclusion and Outlooksmentioning

confidence: 99%

Diazine-based thermally activated delayed fluorescence chromophores

et al. 2022

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Section: Conclusion and Outlooksmentioning

confidence: 99%

Diazine-based thermally activated delayed fluorescence chromophores

et al. 2022

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“…[ 3 ] Generally, scintillators utilize X‐ray photon mainly through photoelectronic effect and Compton scattering and generate lots of secondary electrons, then emitting low‐energy photons for further imaging. [ 4 ] In this case, scintillator plays a decisive role in determining the final performance of the detectors. [ 5 ]…”

Section: Introductionmentioning

confidence: 99%

Cesium Lead Halide Nanocrystals based Flexible X‐Ray Imaging Screen and Visible Dose Rate Indication on Paper Substrate

Chen

Wang

Peng

et al. 2022

Advanced Optical Materials

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Metal halide semiconductors have huge potential on X‐ray detection, due to their high atomic number, adjustable photoluminescence wavelength, superior stability, and simple fabrication process. Here, cesium lead halide nanocrystals (CsPbX3 NCs) are fabricated on paper substrate as scintillator screen for the first time. By means of all‐solution processed spray‐coating method with optimization of polymethyl methacrylate, large‐area (>600 cm2) and low‐cost (0.0975 dollar cm−2) flexible scintillator screens are obtained with high resolution (≈5 lp mm−1), low detection limit (2.97 μGy s−1), high light yield (≈30000 photons/MeV), and fast response speed (<15 ms). The screen can achieve high‐resolution X‐ray non‐distortion imaging for non‐planar objects and realize battery check and safety monitoring at a broad range of photon energy (10–160 keV). In addition, real‐time dose rates can be easily estimated through counting the luminous arcs of the designed visible indicator. More important, the screen shows remarkable tolerance to high‐dose X‐ray radiation (tolerance over 60 Gyair continuous radiation with only 3% performance degradation), water soaking (2000 h), and conventional storage (over 300 days without apparent deterioration under ambient conditions). Hence, this work may provide huge potential in the field of medical diagnosis, non‐planar detection, and safety monitoring in the future.

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“…We then measured the LY of CsPbBr 3 NCs with various Ce 3+ contents (Figure 3d ), where the CsPbBr 3 NCs with 8% Ce 3+ doping content delivered a highest LY of 33 000 photons per MeV, much higher than the commercial LuAG:Ce (22 000 photons MeV). [ 57 ] In our case, the LY is dependent on the doping amount of Ce 3+ ions. The LY rapidly intensifies when the Ce 3+ concentration increase from 0% to 8% and then weakens with further doping amount of Ce 3+ .…”

Section: Resultsmentioning

confidence: 83%

Ultrathin, Transparent, and High Density Perovskite Scintillator Film for High Resolution X‐Ray Microscopic Imaging

Guo

Zhu

et al. 2022

Advanced Science

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Inorganic perovskite quantum dots CsPbX3 (X = Cl, Br, and I) has recently received extensive attention as a new promising class of X‐ray scintillators. However, relatively low light yield (LY) of CsPbX3 and strong optical scattering of the thick opaque scintillator film restrict their practical applications for high‐resolution X‐ray microscopic imaging. Here, the Ce3+ ion doped CsPbBr3 nanocrystals (NCs) with enhanced LY and stability are obtained and then the ultrathin (30 µm) and transparent scintillator films with high density are prepared by a suction filtration method. The small amount Ce3+ dopant greatly enhances the LY of CsPbBr3 NCs (about 33 000 photons per MeV), which is much higher than that of bare CsPbBr3 NCs. Moreover, the scintillator films made by these NCs with high density realize a high spatial resolution of 862 nm thanks to its thin and transparent feature, which is so far a record resolution for perovskite scintillator‐based X‐ray microscopic imaging. This strategy not only provides a simple way to increase the resolution down to nanoscale but also extends the application of as‐prepared CsPbBr3 scintillator for high resolution X‐ray microscopic imaging.

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Thermally activated delayed fluorescence (TADF) organic molecules for efficient X-ray scintillation and imaging

Cited by 246 publications

References 46 publications

Diazine-based thermally activated delayed fluorescence chromophores

Diazine-based thermally activated delayed fluorescence chromophores

Cesium Lead Halide Nanocrystals based Flexible X‐Ray Imaging Screen and Visible Dose Rate Indication on Paper Substrate

Ultrathin, Transparent, and High Density Perovskite Scintillator Film for High Resolution X‐Ray Microscopic Imaging

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