二维MoSe2及其柔性光电探测器的制备与性能

Preparation and performance of 2D MoSe2 and its flexible photodetector

摘要:

二维过渡金属硫属族化合物因其优异的电学、光学、力学等物理化学性质，在电子、光电子等领域具有重要的应用前景。采用水热法成功制备出二硒化钼(MoSe2)材料，通过扫描电镜(SEM)和透射电镜(TEM)表征，制备出的MoSe2呈花状微球，粒径约为200 -300nm之间。采用真空抽滤法以柔性有机尼龙膜为衬底制备MoSe2光电探测器，在不同激光波长和不同激光功率下对其进行光电特性测试，结果表明其在520 nm下的响应度最高为7.5×10-5A/W，；激光功率为0.5mW时，光探测率最大为1×107 cm·Hz1/2/W；光响应度和光探测率随着激光功率的增加而变大，响应时间较快，上升响应时间为4.6 ms，下降响应时间为1.3 ms。

Abstract:

Due to their excellent electrical, optical, mechanical and other physical and chemical properties, two-dimensional transition metal chalcogenide compounds have important application prospects in the fields of electronics and optoelectronics. The MoSe2 material was successfully prepared by the hydrothermal method. The prepared MoSe2 was characterized by SEM and TEM, and the prepared MoSe2 was flower-shaped microspheres with a particle size of about 200-300 nm. The MoSe2 photodetector was prepared by the vacuum filtration method with flexible organic nylon membrane as the substrate, and its photoelectric characteristics were tested under different laser wavelengths and different laser powers. The results showed that the highest responsivity at 520 nm was 7.5×10 -5A/W; when the laser power is 0.5mW, the maximum light detection rate is 1×107 cm·Hz1/2/W; the light responsivity and light detection rate increase with the increase of laser power, and the response time is faster. The rising response time is 4.6 ms, and the falling response time is 1.3 ms.