Efficient and Reabsorption-Free Radioluminescence in Cs3 Cu2 I5 Nanocrystals with Self-Trapped Excitons

Advanced Science
Linyuan LianJianbing Zhang

Abstract

Radioluminescent materials (scintillators) are widely applied in medical imaging, nondestructive testing, security inspection, nuclear and radiation industries, and scientific research. Recently, all-inorganic lead halide perovskite nanocrystal (NC) scintillators have attracted great attention due to their facile solution processability and ultrasensitive X-ray detection, which allows for large area and flexible X-ray imaging. However, the light yield of these perovskite NCs is relatively low because of the strong self-absorption that reduces the light out-coupling efficiency. Here, NCs with self-trapped excitons emission are demonstrated to be sensitive, reabsorption-free scintillators. Highly luminescent and stable Cs3Cu2I5 NCs with a photoluminescence quantum yields of 73.7%, which is a new record for blue emission lead-free perovskite or perovskite-like NCs, is produced with the assistance of InI3. The PL peak of the Cs3Cu2I5 NCs locates at 445 nm that matches with the response peak of a silicon photomultiplier. Thus, Cs3Cu2I5 NCs are demonstrated as efficient scintillators with zero self-absorption and extremely high light yield (≈79 279 photons per MeV). Both Cs3Cu2I5 NC colloidal solution and film exhibit strong radiolum...Continue Reading

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Citations

Jan 6, 2021·Chemical Society Reviews·Mingze Li, Zhiguo Xia
Oct 23, 2020·Frontiers in Chemistry·Ronghua MaDengfeng Peng
Apr 6, 2021·Chemistry of Materials : a Publication of the American Chemical Society·Dongxu ZhuLiberato Manna
Jul 15, 2021·Chemical Communications : Chem Comm·Yuanqian TangYixin Zhao
Jul 21, 2021·The Journal of Physical Chemistry Letters·Linyuan LianJianbing Zhang
Aug 21, 2021·Advanced Healthcare Materials·Jun DaiShixuan Wang
Aug 24, 2021·The Journal of Physical Chemistry Letters·Bin Yang, Keli Han
Oct 26, 2021·The Journal of Physical Chemistry Letters·Xinjiang WangLijun Zhang

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Methods Mentioned

BETA
X‐ray
transmission electron microscopy
Scanning Transmission Electron Microscopy

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