Here, we propose a simple and low-temperature approach for the synthesis of methylammonium lead halide perovskite inks based on sub-micrometer-sized particles with tunable band gap. The particles allow the formulation of inks in benign solvents, such as propan-2-ol, and the printing of the photoactive layers of planar photoconductors with scalable, large-area coating techniques under ambient conditions. When surface traps are passivated with [6,6]-phenyl-C61-butyric acid methyl ester fullerene (PCBM), a high photoconductive gain (exceeding 200 in the blue) and reduced noise produce record-high specific detectivities exceeding 7 × 10¹³ cmHz^0.5/W and gain-bandwidth product values of 7.5 × 10⁶ Hz. Given the extreme simplicity of the presented device architecture and the straightforward processing, yielding printable light detectors rivalling established technologies, the present work promises a short-term deployment of printed perovskite detectors in a multitude of opto-electronic applications.

在此，我们提出了一种基于亚微米尺寸且带隙可调的微粒合成甲基铵卤化铅钙钛矿油墨的简单而低温的方法。这些颗粒允许在良性溶剂（如丙-2-醇）中配制油墨，并在环境条件下使用可扩展的大面积涂覆技术印刷平面光电导体的光敏层。当表面陷阱被[6,6]-苯基-C61-丁酸甲酯富勒烯（PCBM）钝化时，高的光导增益（蓝色超过200）和降低的噪声会产生创纪录的比探测率，超过7×10 ¹³ cmHz ^0.5 / W，增益带宽乘积值为7.5×10 ⁶赫兹。鉴于所提供的设备架构的极度简单和直接的处理，可以产生可与现有技术相媲美的可印刷光探测器，因此，本工作有望在许多光电应用中短期部署钙钛矿探测器。