Photoluminescence from nanocrystalline graphite monofluoride

TL;DR

This study investigates the structural and optical properties of nanocrystalline graphite monofluoride, revealing defect-related photoluminescence across visible wavelengths, with implications for electro-optical applications.

Contribution

It provides new insights into the defect-induced photoluminescence in nanocrystalline graphite monofluoride, a previously less explored carbon-based wide bandgap material.

Findings

Six emission modes identified across visible spectrum

Photoluminescence linked to defect-induced midgap states

Potential for electro-optical device applications

Abstract

We synthesize and study the structural and optical properties of nanocrystalline graphene monofluoride and graphite monofluoride, which are carbon-based wide bandgap materials. Using laser excitations 2.41 - 5.08 eV, we identify six emission modes of graphite monofluoride, spanning the visible spectrum from red to violet. The energy and linewidth of the modes point to defect-induced midgap states as the source of the photoemission. We discuss possible candidates. Our findings open the window to electro-optical applications of graphene fluoride.