光电探测器
光电子学
工作职能
石墨烯
材料科学
激光器
肖特基二极管
肖特基势垒
电极
纳米技术
光学
物理
化学
图层(电子)
二极管
物理化学
作者
Chao Wu,Fengmin Wu,Haizheng Hu,Chaoqun Ma,Junhao Ye,Shunli Wang,Huaping Wu,Jinbin Wang,Aiping Liu,Daoyou Guo
摘要
Laser-induced graphene (LIG) is a simple, environmentally friendly, efficient, and less costly method, as well as can form various shapes on a flexible substrate in situ without the use of masks. More importantly, it can tune the work function of LIG easily by changing laser parameters to control the transportation of carriers. In this work, the work functions of LIG were controlled by adjusting the frequency or speed of the laser, and a series of LIG/GaOx Schottky photodetectors were formed. When the work function of the graphene increases, the Fermi energy is shifted below the crossing point of the Π and Π* bands, and then more electrons or holes can be activated to participate in the conduction process, resulting in low resistance. Meanwhile, a large built-in electric field can be formed when using a high work function LIG, which is more beneficial to separate photo-generated carriers. Enabled by the controllable LIG, LIG/GaOx Schottky photodetectors can be modulated to have high photoresponsivity or self-powered characteristics. Our work provides a high-performance photodetector with excellent mechanical flexibility and long-life stability, promising applications in the flexible optoelectronic fields.
科研通智能强力驱动
Strongly Powered by AbleSci AI