Electronics from solution-processed 2D semiconductors

Abstract

We present the recent progress in the synthesis, assembly, and electronic applications of solution-processed 2D semiconductors.

Recent Advances on Conductive 2D Covalent Organic Frameworks

“…Suitable assembly methods are required to make nanosheets into percolating films, although randomly oriented nanosheets may impede the electron transport across their overlapping interfaces. [125] Therefore, an interfacial assembly strategy based on the condensation reactions between monomers at the gas/liquid or solid/liquid interfaces has been developed to directly yield freestanding thin films (Figure 7m,p). [126] The conductive imine-based polyTB 2D-COF thin-film is synthesized at the air/solution interface in a saturated H 2 O atmosphere using monomers of tris (4-aminophenyl) amine and 2,6-dicarbaldehyde-4,8-dioctyloxybenzo[1,2-b:3,4-b′] dithiophene dissolved in DMF and acetic acid (Figure 7n).…”

Liquid‐Exfoliated 2D Materials for Optoelectronic Applications

“…[258] Shortcomings of this simple deposition method include the difficulty in precisely controlling the thickness and uniformity of the film and inability to obtain large-area thin film. [6,259] Since controlling the thickness of the thin film down to tens of nanometer is nearly impossible by drop-casting method, this technique is not suitable for variety of optoelectronic applications. [259]…”

“…[6,259] Since controlling the thickness of the thin film down to tens of nanometer is nearly impossible by drop-casting method, this technique is not suitable for variety of optoelectronic applications. [259]…”

Two‐Dimensional Cathode Materials for Aqueous Rechargeable Zinc‐Ion Batteries†

“…The top‐down methods include mechanical force‐assisted exfoliation, ion exchange‐assisted intercalation exfoliation, etching and intercalation‐assisted exfoliation, oxidation/reduction‐based intercalation exfoliation. [ 40‐41 ] For bulk materials with a layered structure, the van der Waals force between the layers is weakened by the assistance of intercalation or external shear force, resulting in very thin crystals in the shape of nanosheets, which are usually stabilized by surfactants or solvents. [ 42 ] MXene, [ 43‐44 ] MoS 2 [ 45 ] and MnO 2 [ 46 ] have been obtained by solution‐based top‐down methods for cathodes in ZIBs.…”