An Effort Towards Full Graphene Photodetectors

Abstract

Graphene as a truly 2-dimensional (2D) system is a promising candidate material for various optoelectronic applications. Implementing graphene as the main building material in ultra-broadband photodetectors has been the center of extensive research due to its unique absorption spectrum which covers most of the electro-magnetic spectra. However, one of the main challenges facing the wide application of pure graphene photodetectors has been the small optical absorption of monolayer graphene. Although novel designs were proposed to overcome this drawback, they often need complicated fabrication processes in order to integrate with the graphene photodetector. In this regard, fabrication of purely graphene photodetectors is a promising approach towards the manufacturing of simple, inexpensive, and high photosensitive devices. The fabrication of full graphene photodetectors (FGPDs) is mainly based on obtaining an optimal technique for the growth of high quality graphene, modification of electronic and optical properties of the graphene, appropriate techniques for transfer of graphene from the grown substrate to the desire position, and a proper design for photodetection. Therefore, the available states of the art techniques for each step of device fabrication, along with their pros and cons, are reviewed and the possible approaches for optimization of FGPDs have been proposed.

Near‐Infrared to Visible Light Converter by Integrating Graphene Transistor into Perovskite Quantum Dot Light Emitting Diodes

“…The cause is the built‐in field at the QDs film/graphene interface and the electron traps in the QDs film. These trapped carriers create a photogating effect, [ 22 ] where these holes transform the graphene ribbon's resistance employing capacitive coupling. Photogenerated holes that transfer to the graphene will drift to the drain at the bias V DS .…”

Applications of Graphene in Five Senses, Nervous System, and Artificial Muscles

“…The standardization of transistors , and chemiresistors becomes vital prior to the industrial production of sensors. All graphene photodetectors and transistors become essential for flexible biocompatible electronics. Classification of graphene/graphene oxide nanoparticles may improve the quantitative evaluation of sensing performances .…”

Surface Functionalization of Substrate-Transferred Graphene for Electronic Applications

“…(see reviews in refs − for various methods). Possessing unique physical properties, graphene is used in many electronics applications. ,,− For these applications, the graphene layer should be transferred from its original growth location, typically (for the most widely used CVD deposition for large-area graphene sheets) on a transition-metal surface (such as copper or nickel foil) to a dielectric solid substrate, such as Si/SiO 2 , sapphire, glass, etc. There are many methods of performing this transfer, as described in the aforementioned reviews.…”