An Effort Towards Full Graphene Photodetectors
- PDF / 2,401,225 Bytes
- 37 Pages / 595.22 x 842 pts (A4) Page_size
- 74 Downloads / 174 Views
An Effort Towards Full Graphene Photodetectors Farhad LARKI1*, Yaser ABDI2, Parviz KAMELI1, and Hadi SALAMATI1 1
Department of Physics, Isfahan University of Technology, Isfahan 84156–83111, Iran
2
Nanophysics Research Lab, Department of Physics, University of Tehran, Tehran 84156–83111, Iran
*
Corresponding author: Farhad LARKI
E-mail: [email protected]
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. Keywords: Graphene; photodetectors; graphene growth; photodetection Citation: Farhad LARKI, Yaser ABDI, Parviz KAMELI, and Hadi SALAMATI, “An Effort Towards Full Graphene Photodetectors,” Photonic Sensors, DOI: 10.1007/s13320-020-0600-7.
1. Introduction As an exotic 2-dimansional (2D) material, graphene is an attractive material for future optoelectronic devices due to its excellent electronic and optical properties, such as variety of transport phenomena that are characteristics of 2D Dirac fermions, near-ballistic transport at room temperature, bipolarity, high purity, high mobility, high critical current density, linear dispersion of the Dirac electrons, and saturable absorption [17]. In addition to many potential applications of grapheme, such as touch screen displays [8], flexible electronic
devices [9], organic light-emitting diodes (OLEDs) [10], high-frequency transistors [11], tissue engineering applications, regenerative medicine [12], optical modulator [13], mode-locked laser/THz generator [14], and solar cells [15, 16], graphene can also be used as a promising material for ultra-broadband photodetectors. For implementation of graphene in any of the above applications, it is crucial to know the fundamental properties of the graphene as well as suitable techniques fo
Data Loading...
