Graphdiyne and Its Derivatives as Efficient Charge Reservoirs and Transporters in Semiconductor Devices

Abstract

2D graphdiyne (GDY), which is composed of sp and sp 2 hybridized carbon atoms, is a promising semiconductor material with a unique porous lamellar structure. It has high carrier mobility, tunable bandgap, high density of states, and strong electrostatic interaction ability with ions and organic functional units. In recent years, interests in applying GDYs (GDY and its derivatives) in semiconductor devices have been growing rapidly, and great achievements have been made. Attractively, GDYs could act as efficient reservoirs and transporters for both carriers and ions, which endows them with enormous potential in future novel optoelectronics. In this review, the progress in this field is systematically summarized, aiming to bring an in-depth insight into the GDYs' intrinsic uniqueness. Particularly, the effects of GDYs on carrier dynamics and ionic interactions in various semiconductor devices are succinctly described, analyzed, and concluded.

Current Advances in the Synthesis, Properties, and Biomedical Applications of Two-Dimensional Graphdiyne: A Review

“…At the same time, GDY has good electron- and hole-transfer capability at room temperature; the monolayer GDY’s electron mobility can reach 2 × 10 5 cm 2 ·V –1 ·s –1 , but its hole mobility can only reach 2 × 10 4 cm 2 ·V –1 ·s –1 , which is a factor of 10 lower than the electron mobility. − The small energy gap limits the practical applications of GDY. The band gap of GDY can be efficiently modulated by various strategies, such as the construction of nanoribbons, the changes in the morphology of GDY, chemical functionalization, and the application of electric fields . The excellent conductivity of GDY makes it widely applied in photocatalytic sterilization, biosensing, and so on. , …”

“…The band gap of GDY can be efficiently modulated by various strategies, such as the construction of nanoribbons, the changes in the morphology of GDY, 36 chemical functionalization, and the application of electric fields. 87 The excellent conductivity of GDY makes it widely applied in photocatalytic sterilization, biosensing, and so on. 53,88 Yao et al 89 proposed a gold nanoparticles (AuNPs)/GDYbased photoelectrochemical (PEC) sensing method as a composite material with low background signals, modifying electrodes coupled with nanoprobes DNA/dopamine/4mercaptophenylboronic acid/tungsten selenide (probe DNA/ DA/MBA/WSe 2 ) for the detection of sensitive α-synuclein.…”

Recent progress in neuromorphic and memory devices based on graphdiyne

“…Especially, the excellent physical and chemical properties of GDY, including the ordered pore structure, direct bandgap, broadband light absorption, strong charge trapping, low ion diffusion barrier, and excellent flexibility, are favorable for applications in neuromorphic devices. For instance, the abundant defects in GDY introduced during the synthesis process endow GDY with great potential in neuromorphic devices since the long-term trapping and slow release of charges at these charge-trapping sites facilitate the emulation of various synaptic plasticity [ 119 ]. The density of defects can also be controlled by defect engineering and post-treatment.…”

Recent Synthetic Methods towards Graphdiyne

“…[28][29][30] Given the unique 2D conjugated structure of graphyne, it is of great significance to search for the preparation and properties of this new carbon allotrope. [31][32][33][34][35] Although continuous efforts have been made, a breakthrough in graphyne synthesis has yet to be achieved until 2010. Li and co-workers successfully synthesized graphdiyne (GDY) by copper surface-assisted Glaser-Hay coupling reaction.…”