Ji Yu , Yinxian Luo , Ning Tian , Lin Li , Wenzhu Tan , Ruoning Zheng
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引用次数: 0
摘要
有机-无机杂化包晶 CH3NH3PbI3（MAPbI3）单晶（SCs）已在光电探测和 X 射线探测领域得到广泛研究。然而，外部电场驱动的离子迁移严重影响了基于 MAPbI3 SCs 的光电器件的稳定性。自供电器件可以在没有任何外部电源的情况下工作，适用于减缓 MAPbI3 SCs 的离子迁移。为了实现基于 MAPbI3 SC 的自供电光电探测器和 X 射线探测器，本研究采用了非对称金/CH3NH3PbI3 SC/Au 平面肖特基结构。在 0 V 电压下，自供电光电探测器在波长为 795 nm 时的响应率可达 11.1 mA/W，而自供电 X 射线探测器的灵敏度可达 477.1 μC Gy-1cm-2，探测极限低至 140.3 nGy s-1。此外，自供电光电装置在光探测和 X 射线探测方面都表现出良好的稳定性。最重要的是，上述自供电光电器件成功实现了高质量的近红外生物成像和 X 射线成像。
High performance self-powered photodetection and X-ray detection realized by CH3NH3PbI3 single crystal with planar asymmetric Schottky structure
Organic-inorganic hybrid perovskite CH3NH3PbI3 (MAPbI3) single crystals (SCs) have been widely investigated in photodetection and X-ray detection. However, external electric-field-driven ion migration seriously affect the stability of MAPbI3 SCs based optoelectronic devices. Self-powered device can operate without any external power supply, which is suitable for mitigating the ion migration of MAPbI3 SCs. To realize self-powered MAPbI3 SC based photodetector and X-ray detector, an asymmetric Au/CH3NH3PbI3 SC/Au planar Schottky structure is employed in this work. At 0 V, the self-powered photodetector can achieve the responsivity of 11.1 mA/W at the wavelength of 795 nm, and the sensitivity of the self-powered X-ray detector can reach 477.1 μC Gy-1cm-2 with the detection limit of as low as 140.3 nGy s-1. Moreover, the self-powered optoelectronic device exhibits good stability in both photodetection and X-ray detection. Most importantly, high-quality near-infrared bioimaging and X-ray imaging are successfully realized by the above self-powered optoelectronic device.
期刊介绍：
Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.
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