用溶液法制备钙钦矿纳米线光电探测器

Fabrication of Perovskite Nanowire Photodetectors by Solution Process

作为一种优秀的光吸收半导体材料,有机-无机杂化钙钛矿被广泛应用于光电领域。为了制备高性能光电探测器件,采用溶液法制备了高度有序、超长的CH_3NH_3PbI_3纳米线,并将其应用于Au/CH_3NH_3PbI_3/Au平面型光电探测器。该器件具有宽的工作波段,在紫外-可见光-近红外(365~808 nm)光谱范围内均有响应。其最大光响应度达到3.81A·W^(-1),比探测率为3.7×10^(11)Jones,开关比为4.9×10~3,光响应时间约为7ms。由于具有优异的光探测能力,该器件拥有广阔的应用前景。

As an excellent light absorption semiconductor material, organic-inorganic hybrid halide perovskite has been widely used in the field of optoelectronics. To fabricate high performance photoelectric detection devices, a highly ordered ultra-long CH_3 NH_3 PbI_3 nanowire is prepared by solution process and is used to fabricate an Au/CH_3 NH_3 PbI_3/Au planar photoelectric detector. The device has a wide operation waveband. It has light response in the spectral range from ultraviolet to near-infrared（365-808 nm）. Its maximum light responsibility（R）, detectivity（D~＊）, Ilight-Idark ratio and light response time are up to 3.81 A·W^（-1）, 3.7 × 10^（11） Jones, 4.9 × 10~3 and 7 ms respectively. Because of excellent light detection ability, the device has a wide application prospect.