Bao Yunxia, Han Jianfu, Li Hongxing, Huang Kai
School of Physics and Optoelectronics & Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Hunan 411105, People's Republic of China.
Nanotechnology. 2021 Jan 8;32(2):025206. doi: 10.1088/1361-6528/abbb4b.
Muscovite mica, a natural layered material with excellent flexibility and super flat surface, which can be well integrated into flexible optoelectronic devices. In addition to its ability to withstand higher temperatures than conventional flexible substrates, its natural high surface energy and hydrophilicity give muscovite mica a good adsorption capacity for two-dimensional materials. Here, we combined mica substrate with a thin film of MoS nanosheets floating on the water surface to produce a flexible, heat-resistant photodetector. The device exhibits excellent response stability, superior flexibility and fast response time (976 ms of rise time and 161 ms of decay time). Moreover, the responsivity of 8.45 μA∙W and the detectivity of 4.1 × 10 Jones are realized respectively. After 500 bending cycles, the photodetector still possesses the ability to output the photocurrent signal continuously and stably. What's more, the devices have a consistent performance after 300 °C bake, showing excellent stability and fast response. This work shows great potential for flexible photodetectors and contributed to the development of flexible optoelectronic devices from the room-temperature to heat-resistance practical applications.
白云母是一种天然层状材料，具有出色的柔韧性和超平坦表面，能够很好地集成到柔性光电器件中。除了具有比传统柔性基板更高的耐高温能力外，白云母天然的高表面能和亲水性使其对二维材料具有良好的吸附能力。在此，我们将云母基板与漂浮在水面上的MoS纳米片薄膜相结合，制备出一种柔性、耐热的光电探测器。该器件表现出优异的响应稳定性、卓越的柔韧性和快速的响应时间（上升时间976毫秒，衰减时间161毫秒）。此外，分别实现了8.45 μA∙W的响应度和4.1×10琼斯的探测率。经过500次弯曲循环后，该光电探测器仍具备连续稳定输出光电流信号的能力。更重要的是，器件在300°C烘烤后性能一致，展现出优异的稳定性和快速响应。这项工作为柔性光电探测器展示了巨大潜力，并推动了柔性光电器件从室温到耐热实际应用的发展。
