Growth direction dependent separate-channel charge transport in the organic weak charge-transfer co-crystal of anthracene–DTTCNQ

Abstract

Co-crystallization is an efficient way of molecular crystal engineering to tune the electronic properties of organic semiconductors. In this work, we synthesized anthracene-4,8-bis(dicyanomethylene)4,8-dihydrobenzo[1,2-b:4,5-b’]-dithiophene (DTTCNQ) single crystals as a template to...

Synthesis and photophysical properties of charge transfer cocrystals based on TCNB and fluorene and its derivatives

“…Recently organic cocrystals have been widely studied due to their unique and novel properties, such as tunable luminescence, 1,2 two-photon absorption, 3,4 optical waveguide, 5–7 bipolar charge transport, 8,9 photothermal conversion, 10–12 etc. Organic cocrystals are single-phase materials assembled by two or more molecules according to a certain stoichiometric ratio.…”

Morphology-Dependent Optoelectronic Properties of Pentacene Nanoribbon and Nanosheet Crystallite

“…In addition, the crystallization rates of different facets govern the macroscopic morphologies of crystals and their products, such as nanosheets, nanodishes, nanorods, and nanowire, and these correspond to the molecular stacking direction. Differently shaped crystals have different applications according to our requirements, even with respect to the same material [ 29 , 30 , 31 , 32 , 33 , 34 ]. Owing to their desirable optoelectronic properties, high-quality, organic, single-crystalline materials are heavily demanded components in optoelectrical functional devices [ 13 ].…”

The competitive role of C–H⋯X (X = F, O) and π–π interactions in contributing to the degree of charge transfer in organic cocrystals: a case study of heteroatom-free donors with p-fluoranil (FA)

“…The rational design and synthesis of novel materials with desirable physical properties by utilizing structural motifs created by weak intermolecular interactions is the main goal of crystal engineering. [1][2][3] The weak intermolecular interactions, which include π-π interactions, 4 charge transfer interactions, 5 hydrogen bond interactions 6 and halogen bond interactions, 7,8 play a critical role in tailoring the physical properties of materials, such as conductivity, [9][10][11][12] organic photovoltaics, [13][14][15] superconductivity, 16 room temperature ferroelectricity, [17][18][19] room temperature phosphorescence properties [20][21][22][23] and ambipolar charge transport. [24][25][26][27][28][29] Generally, weak intermolecular interactions (π-π interactions and charge transfer interactions) can be effectively regulated through the charge transfer in an organic charge transfer cocrystal.…”