About this Engineering article
X‐Ray Quantum Cutting Scintillator Based on CsPbClxBr3−x:Yb3+ Single Crystals by Lu Zi; Jian Song; Nan Wang; Tianyuan Wang; Wei Li; Hancheng Zhu; Wen Xu; Hongwei Song is a Engineering article available to read on EtoBox.
Metal-halide perovskites, especially for 3D halide perovskite single crystals (SCs), are emerging as the promising scintillators. However, the strong self-absorption and low light yield of these perovskites restrict their practical applications. Quantum cutting can convert a high energy photon into multiple low energy photons, endowing a large Stokes shift and high photoluminescent quantum yield (PLQY). Here, this work reports a novel quantum cutting material, CsPbCl x Br 3-x :Yb 3+ perovskite SCs, with the PLQY of 149% and a Stokes shift >550 nm, successfully conquering the issues of poor PLQY induced by the thermal quenching and the large self-absorption in perovskite SCs. Benefiting from the extremely high PLQY and negligible self-absorption effect, the first high-performance quantum cutting scintillators based on CsPbCl x Br 3-x :Yb 3+ perovskite SCs are developed, exhibiting high transmittance, large X-ray absorption/conversion efficiency, outstanding light yield of ≈1.12 × 10 5 photons MeV -1 , and a detection limit as low as 176.5 nGy air s -1 . Finally, a single-pixel X-ray imaging is achieved by integrating CsPbCl 3 :Yb 3+ SCs with silicon photomultiplier. This work sheds
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- Author
- Lu Zi; Jian Song; Nan Wang; Tianyuan Wang; Wei Li; Hancheng Zhu; Wen Xu; Hongwei Song
- Publisher
- Wiley
- Published
- 2023
- Language
- EN
- Field
- Engineering (Physical Sciences)