Huang Liting, Zhu Zhaowei, Cheng Chuantong, Gao Y
College of Science, China Agricultural University, Beijing 100083, People's Republic of China.
Key Laboratory of Optoelectronic Materials and Devices, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, People's Republic of China.
Nanotechnology. 2024 Jun 20;35(36). doi: 10.1088/1361-6528/ad4b25.
Long term stability, high responsivity, and fast response speed are essential for the commercialization of graphene photodetectors (GPDs). In this work, a parylene/graphene UV photodetector with long term stability, ultrahigh responsivity and fast response speed, is demonstrated. Parylene as a stable physical and chemical insulating layer reduces the environmental sensitivity of graphene, and enhances the performances of GPDs. In addition, utilizing bilayer electrodes reduces the buckling and damage of graphene after transferring. The parylene/graphene UV photodetector exhibits an ultrahigh responsivity of 5.82 × 10AWunder 325 nm light irradiation at 1 V bias. Additionally, it shows a fast response speed with a rise time of 80s and a fall time of 17s, and a long term stability at 405 nm wavelength which is absent in the device without parylene. The parylene/graphene UV photodetector possesses superior performances. This paves the way for the commercial application of the high-performance graphene hybrid photodetectors, and provides a practical method for maintaining the long term stability of two dimensional (2D) materials.
长期稳定性、高响应度和快速响应速度对于石墨烯光电探测器（GPD）的商业化至关重要。在这项工作中，展示了一种具有长期稳定性、超高响应度和快速响应速度的聚对二甲苯/石墨烯紫外光电探测器。聚对二甲苯作为一种稳定的物理和化学绝缘层，降低了石墨烯对环境的敏感性，并提高了GPD的性能。此外，采用双层电极减少了转移后石墨烯的屈曲和损伤。聚对二甲苯/石墨烯紫外光电探测器在1V偏压下325nm光照射下表现出5.82×10AW的超高响应度。此外，它显示出快速的响应速度，上升时间为80s，下降时间为17s，并且在405nm波长下具有长期稳定性，而没有聚对二甲苯的器件则没有这种稳定性。聚对二甲苯/石墨烯紫外光电探测器具有优异的性能。这为高性能石墨烯混合光电探测器的商业应用铺平了道路，并为维持二维（2D）材料的长期稳定性提供了一种实用方法。
