globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2021.06.016
论文题名:
Fine-control-valve of halide perovskite single crystal quality for high performance X-ray detection
作者: Li W.; Li H.; Song J.; Guo C.; Zhang H.; Wei H.; Yang B.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
语种: 英语
中文关键词: Crystal growth strategy ; Perovskite single crystal ; Sensitive X-ray detectors ; Solution-processed
英文关键词: Carrier mobility ; Crystal growth ; Film growth ; Films ; Growth rate ; Perovskite solar cells ; Planning ; Quality control ; Single crystals ; Surface defects ; X ray detectors ; Control valves ; Crystal growth rates ; Crystal growth strategy ; Growth method ; Halide perovskites ; Perovskite single crystal ; Sensitive X-ray detector ; Solution-processed ; Solvent volatilization ; X-ray detections ; Perovskite
英文摘要: Halide perovskite single crystals (HPSCs) provide a unique platform to study the optoelectronic properties of such emerging semiconductor materials, while the temperature induced crystal growth method often has an increased solute integration speed and/or unavoidable solute consumption, resulting in a soaring or slumping crystal growth rate of HPSCs. Here, we developed a universal and facile solvent-volatilization-limited-growth (SVG) strategy to finely control the crystal growth rate by the fine-control-valve for high quality crystal grown through solution processes. The grown HPSCs by SVG method exhibited a record low trap density of 2.8 × 108 cm−3 and a high charge carrier mobility-lifetime product (μτ product) of 0.021 cm2/V, indicating the excellent crystal quality. The crystal surface defects were further passivated by oxygen suppliers as Lewis base, which led to a reduction of surface leakage current by two times when using for low dose rate X-ray detection. Such HPSC X-ray detector displayed a high sensitivity of 1274 µC/(Gyair cm2) with a lowest detectable dose rate of 0.56 μGyair/s under 120 keV hard X-ray. Further applications including alloy composition analysis and metal flaw detection by HPSC detectors were also demonstrated, which not only shows the bright future for product quality inspection and non-destructive materials analysis, but also paves the way for growing high quality single crystals and fabricating polycrystalline films. © 2021 Science China Press
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170317
Appears in Collections:气候变化与战略

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作者单位: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China; Joint Laboratory of Opto-Functional Theranostics in Medicine and Chemistry, The First Hospital of Jilin University, Changchun, 130061, China; Department of Radiology, The First Hospital of Jilin University, Changchun, 130012, China

Recommended Citation:
Li W.,Li H.,Song J.,et al. Fine-control-valve of halide perovskite single crystal quality for high performance X-ray detection[J]. Science Bulletin,2021-01-01
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