Understanding graphyne; theoretical insights and its optoelectronic behaviour

Two-dimensional Graphynes (GYs) exhibit extraordinary properties, owing to the highly conjugated doubly and triply bonded carbon atoms in the hexagonal lattice. Recently, γ-GYs have attracted tremendous interest due to its exciting electrical and optical properties and it is necessary to comprehend these properties for future research in this field. This review focus on discussing the fundamental chemistry of the combination of sp and sp² hybridization in GYs that contributes to its unique properties, particularly opto electrochemical properties of GYs. A detailed track record against a set of properties for developing efficient GYs based materials will help us look ahead in the right direction. The theoretical analysis of the electronic band structure of GYs, stability in relation to sp hybridization, experimental techniques used to tune their optical bandgap, and to improve mobility and carrier lifetimes, are covered in this review. The review then lists the merits of using GYs in various photo and electrochemical applications. Finally, current difficulties and future prospects for using these materials for the specified purpose are discussed.