PHOTOLUMINESCENCE AND RAMAN STUDIES OF GRAPHENE THIN FILMS PREPARED BY REDUCTION OF GRAPHENE OXIDE

Author (s) : Mrs.A.SUGUNA

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Abstract :
Photoluminescence (PL) and Raman studies have been performed to investigate the optical properties of graphene thin films prepared by chemical and thermal reductions of graphene oxide (GO). The G peak in Raman spectra red-shifted after reduction of GO. Thermal reduction resulted in a more red-shift of the G peak than chemical reduction. A strong intensity of the D peak indicated that the prepared grapheme films have significant structural disorders. A blue-shifted emission in PL spectra suggested that sp²clusters are embedded in a sp³ matrix that acts as a tunnel barrier, causing a strong fluctuation in the local band gap.

Keywords : Raman spectra, sp3 matrix.

Conference Date : 17/09/2021

Pages : 130

Paper ID : IESMDT128