Metal–Organic‐Compound‐Modified MoS₂ with Enhanced Solubility for High‐Performance Perovskite Solar Cells

Abstract

MoS as a graphene-like 2 D material shows a large potential to replace and even overcome graphene in various important applications owing to its ideal properties of electrical, optical, frictional, and tunable band gap. However, its low solubility in the most of common solvents makes it difficult to prepare by a simple solution process. Here, we introduce a metal-organic compound to modify MoS . Phenyl acetylene silver (PAS)-functionalized MoS is easily dispersed in solvents like DMF and water. A conductive polymer PEDOT:PSS (poly(3,4-ethylenedioxythiophene) polystyrene sulfonate) blend with the MoS leads to a significant enhancement of the performance of planar heterojunction perovskite solar cells. The solar cells have a high power conversion efficiency of 16.47 % as well as largely increased stability. This provides a feasible method for large-scale production of MoS for wide applications in various electric devices.

Coordination‐Driven Hierarchical Assembly of Hybrid Nanostructures Based on 2D Materials

“…Although these S atoms are chemically inert, they show high affinity with transition metal cations such as Cu 2+ , Ni 2+ , Zn 2+ , Mn 2+ , Fe 2+ /Fe 3+ , Ti 4+ , Eu 3+ , Gd 3+ , etc. Thanks to this affinity, various building blocks could assemble with MoS 2 to obtain hybrid nanostructures through coordination interaction, including organic molecules (small molecules and macromolecules), inorganic nanoparticles, metal–organic frameworks, etc …”

“…2D TMDs exhibit huge specific surface area, and their electronic properties can be tuned by changing the chemical composition, i.e., the transition metal or chalcogenide elements, and altering the layers of nanosheets. Therefore, they were widely employed as a substrate to hybridize with functional building blocks for applications of energy conversion . Generally, these functional building blocks were bridged to TMDs through coordination bond at S vacancies and/or S atoms, which improved not only the energy conversion efficiency, but also the stability of the resulting architectures .…”

“…Therefore, they were widely employed as a substrate to hybridize with functional building blocks for applications of energy conversion . Generally, these functional building blocks were bridged to TMDs through coordination bond at S vacancies and/or S atoms, which improved not only the energy conversion efficiency, but also the stability of the resulting architectures . Besides, the solubility of TMDs in various solvents was also enhanced.…”

Defect Control in the Synthesis of 2 D MoS2 Nanosheets: Polysulfide Trapping in Composite Sulfur Cathodes for Li–S Batteries

“…MoS 2 is a 2 D material of increasing research interest recently owing to its interesting physical and electronic properties, including high conductivity, high surface area, and active sites for a diversity of applications . Previous reports relevant to Li–S batteries have used MoS 2 as a means to inhibit or anchor PS species during electrochemical cycling .…”

“…[12,13] MoS 2 is a2Dm aterialo fi ncreasing research interest recently owing to itsi nterestingp hysical and electronic properties, including high conductivity,h ighs urfacea rea, and active sites for ad iversity of applications. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] Previous reports relevant to Li-S batteries have used MoS 2 as am eans to inhibit or anchor PS speciesduring electrochemical cycling. [29] These can be generalized into three strategies using MoS 2 :p rotection by augmenting the separator,t he Li-metala node, and PS trapping by inclusion in ac omposite cathode.…”