Demonstration of Near Infrared Detection Using Intercalated Graphene Photodetector

Here a graphene-based photodetectors with ability to integrate with various energy thermoelectric, electromagnetic and piezoelectric devices is reported. The fabrication of the proposed device is based on magnetic field assisted pulsed laser deposition (MFPLD) for growth of few layers graphene and intercalated chemical vapor deposition (CVD) graphene grown following by a wet transfer of the layers to the electrode surface. The key influential parameter in the graphene growth such as density and smoothness of surface, as well as the plasma plume particles charge type and velocity have been optimized to obtain the best quality of the graphene and consequently improve the performance of the device. For the electrical contacts a tapered aluminum microelectrode (TAM) has been used to improve the detection of photogenerated carriers during the illumination. The results reveal the acceptable wide band response, leading to a responsivity of up to 0.13 AW-1, quantum efficiency of 9.5% and room temperature specific detectivity of 1.27x10+7 Jones at wavelength of 1700 nm.