Perovskite-based photodetectors show a great promise thanks to the material's excellent photogeneration and broadband device operation. Amongst the fundamental limitations of halide perovskites, humidity-induced degradation arises as the main impediment towards viable commercial-grade perovskite-based technologies. Here, we report a stable, reproducible and reliable pseudo halide perovskite nanowire network-based photodetector with superior performances. The perovskite nanowire network is deposited using a two-step spin-coating process atop patterned substrates under ambient conditions with relative humidity (RH%), higher than 50%. Because of the particular 1D perovskite nanowire morphology, our devices require no charge collectors, which reduces fabrication steps and costs. Most importantly, we demonstrate that incorporation of lead thiocyanate (Pb(SCN)₂) directly in the precursor solution promotes the synthesis of stable hybrid perovskite nanowire networks in ambient conditions. These devices exhibit response time as fast as 50 µs and responsivities up-to ~0.23 A W⁻¹ at 2 V bias. Also, the optimum photodetector exhibited high specific detectivity of 7.1 × 10¹¹ cm Hz^1/2 W⁻¹. This novel and yet simple device architecture brings fabrication challenges to a minimum by allowing synthesis of perovskite nanowires under high humidity conditions.

基于钙钛矿的光电探测器显示出了巨大的前景，这要归功于该材料具有出色的光生性和宽带设备的运行性能。在卤化物钙钛矿的基本局限性中，湿度引起的降解是对可行的商业级钙钛矿基技术的主要障碍。在这里，我们报告稳定，可重现和可靠的伪卤化物钙钛矿纳米线网络为基础的光电探测器，具有卓越的性能。钙钛矿纳米线网络是在环境条件下，相对湿度（RH％）高于50％的条件下，通过两步旋涂工艺在图案化基材上沉积的。由于特殊的一维钙钛矿纳米线形态，我们的设备不需要电荷收集器，从而减少了制造步骤并降低了成本。最重要的是，₂）直接在前体溶液中促进在环境条件下稳定杂化钙钛矿纳米线网络的合成。这些器件的响应时间高达50 µs，在2 V偏压下的响应度高达〜0.23 A W ^-1。另外，最佳光电检测器表现出7.1×10 ¹¹ cm Hz ^1/2 W ^-1的高比检测率。通过允许在高湿度条件下合成钙钛矿纳米线，这种新颖而又简单的器件架构将制造挑战降至最低。