Effect of Nitrogen Doping on the Optical Bandgap and Electrical Conductivity of Nitrogen-Doped Reduced Graphene Oxide

Overview

Journal Molecules

Publisher MDPI

Specialty Biology

Date 2021 Nov 13

PMID 34770833

Citations 5

Authors

Gunawan Witjaksono

Muhammad Junaid

Mohd Haris Khir

Zaka Ullah

Nelson Tansu

Mohamed Shuaib Bin Mohamed Saheed

Muhammad Aadil Siddiqui

Saeed S Ba-Hashwan

Abdullah Saleh Algamili

Saeed Ahmed Magsi

Muhammad Zubair Aslam

Rab Nawaz

Affiliations

Soon will be listed here.

Abstract

Graphene as a material for optoelectronic design applications has been significantly restricted owing to zero bandgap and non-compatible handling procedures compared with regular microelectronic ones. In this work, nitrogen-doped reduced graphene oxide (N-rGO) with tunable optical bandgap and enhanced electrical conductivity was synthesized via a microwave-assisted hydrothermal method. The properties of the synthesized N-rGO were determined using XPS, FTIR and Raman spectroscopy, UV/vis, as well as FESEM techniques. The UV/vis spectroscopic analysis confirmed the narrowness of the optical bandgap from 3.4 to 3.1, 2.5, and 2.2 eV in N-rGO samples, where N-rGO samples were synthesized with a nitrogen doping concentration of 2.80, 4.53, and 5.51 at.%. Besides, an enhanced n-type electrical conductivity in N-rGO was observed in Hall effect measurement. The observed tunable optoelectrical characteristics of N-rGO make it a suitable material for developing future optoelectronic devices at the nanoscale.

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