Development of Light Energy Converters by using Short-Chain Dyad-Graphene Oxide and Graphene Quantum Dot Nanocomposites: A Comparative Approach

Abstract

In this chapter, the measurements of fluorescence lifetimes of short-chain dyads ((E)-4-(((9H-fluorene-2-yl) Dimino)-methyl), N, N dimethyl-aniline (NND MBF)-graphene quantum dot (GQD) nanocomposite systems were made. The results observed from this system have been compared with the pristine dyad (p-dyad) and graphene oxide (GO)-dyad nanocomposite and Carbon Quantum Dot(CQD) nanocomposite. When compared to pristine dyad and dyad-GO systems, the dyad-GQD appears to be a much better light-energy converter because of its superior capacity for trans-conformer retention, which can occur even under a photoexcitation state. In the instance of the nanocomposite dyad NNDMBF-GQD, the surface trap effects may be the cause of the excited state's trans-conformer's relative stability when compared to its pristine form.

Keywords: Carbon quantum dots, Charge-separated species, Charge recombination, Electron transfer, Electron donor, Electron acceptor, Energy storage, Fluorescence lifetimes, Graphene quantum dots, Graphene oxide, Nanocomposites, Pristine dyad.