One-dimensional organic–inorganic hybrid perovskite nanowires (NWs) with well-defined structures can possess superior optical and electrical properties for optoelectronic applications. However, most of the current perovskite NWs are prepared in the air, making the perovskite NWs vulnerable to moisture and resulting in large amounts of grain boundaries (GBs)/surface defects on NWs. Here, we report the use of an isolated growth environment (organic solvent vapor atmosphere), termed saturated vapor-assisted crystallization method, to fabricate high-quality single-crystalline CH₃NH₃PbI₃ NWs. The NWs have smooth surface with few GBs and surface defects because of the elimination of moisture intrusion in the vapor atmosphere. Significantly, photodetectors based on the as-prepared single-crystalline CH₃NH₃PbI₃ NWs demonstrated an extremely high photoresponsivity up to 460 A/W, an ultrafast response time of ∼180 us, a large specific detectivity of 2.6 × 10¹³ jones, as well as an improved stability in air over 45 days. The device performance is among the best in the CH₃NH₃PbI₃ NW-based devices. Kelvin probe force microscopy investigation further offered an insight into the excellent photoconductive properties of the CH₃NH₃PbI₃ NWs. This work paves the way toward the fabrication of high-performance nano-optoelectronic devices based on the high-quality organic–inorganic hybrid perovskite CH₃NH₃PbI₃ NWs.

中文翻译：

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饱和蒸汽辅助生长的单晶有机-无机杂化钙钛矿纳米线，用于具有稳定稳定性的高性能光电探测器

具有明确结构的一维有机-无机杂化钙钛矿纳米线（NWs）可以为光电应用提供卓越的光学和电学性能。但是，目前大多数钙钛矿净水都是在空气中制备的，这使得钙钛矿净水易受潮，并导致大量的晶界（GB）/ NW表面缺陷。在这里，我们报告了使用一种称为饱和蒸气辅助结晶法的孤立生长环境（有机溶剂蒸气气氛）来制造高质量的单晶CH ₃ NH ₃ PbI _{3的方法。}西北。NW具有光滑的表面，几乎没有GB和表面缺陷，这是因为消除了蒸气环境中的水分侵入。值得注意的是，基于已制备的单晶CH ₃ NH ₃ PbI ₃ NW的光电探测器显示出高达460 A / W的极高光响应性，超快响应时间为〜180 us，大比检测率为2.6×10 ¹³琼斯以及在45天内改善的空气稳定性。在基于CH ₃ NH ₃ PbI ₃ NW的设备中，该设备的性能是最好的。开尔文探针力显微镜研究进一步洞察了CH ₃的出色光电导性能NH ₃ PbI ₃ NW。这项工作为基于高质量有机-无机杂化钙钛矿CH ₃ NH ₃ PbI ₃ NWs的高性能纳米光电器件的制造铺平了道路。