Multifunctional Features of Organic Charge‐Transfer Complexes: Advances and Perspectives

Abstract

The recent progress of charge‐transfer complexes (CTCs) for application in many fields, such as charge transport, light emission, nonlinear optics, photoelectric conversion, and external stimuli response, makes them promising candidates for practical utility in pharmaceuticals, electronics, photonics, luminescence, sensors, molecular electronics and so on. Multicomponent CTCs have been gradually designed and prepared as novel organic active semiconductors with ideal performance and stability compared to single components. In this review, we mainly focus on the recently reported development of various charge‐transfer complexes and their performance in field‐effect transistors, light‐emitting devices, lasers, sensors, and stimuli‐responsive behaviors.

Organic Cocrystals: Recent Advances and Perspectives for Electronic and Magnetic Applications

“…The liquid-phase methods are the most frequently used methods for preparing cocrystals owing to the advantages of low cost and easy preparation ( Yan et al, 2014 ; Li and yan, 2018b ; Lu et al, 2018 ). By adjusting some factors such as solvent type, temperature, and concentration, cocrystals of different morphologies and sizes can be obtained easily ( Wang et al, 2021 ). Here, we mainly introduced three common liquid-phase methods: slow evaporation, drop-casting, and diffusion method.…”

“…Compared with the liquid phase methods, vapor phase methods are unrelated to materials’ solubility, which are suitable for materials with low solubility ( Wang et al, 2021 ; Fang et al, 2017 ). The physical vapor transport (PVT) method is most popular ( Figure 1E ), using equipment consisting of a vacuum pump, a tubular furnace, a quartz tube, temperature controllers, and a gas path device.…”

Molecule Recognition and Release Behavior of Naphthalenediimide Derivative via Supramolecular Interactions

“…Currently, organic charge‐transfer cocrystals have attracted increasing attention in biology, chemistry, materials science, and electronics, [ 1–3 ] with widespread applications in organic field‐effect transistors (OFETs), [ 4–7 ] organic photovoltaic devices, [ 8,9 ] nonlinear optics, [ 10,11 ] stimuli‐ responsive materials, [ 12,13 ] and pharmaceutics, [ 14–16 ] etc. For rational molecular recognition, sufficient intermolecular interactions are required as a driving force to construct a stable multi‐component framework.…”

Self‐assembled fullerene (C60)‐pentacene superstructures for photodetectors

“…13 Compared with fullerene unimolecular systems, donor-acceptor complexes based on fullerene would yield multifunctional metamaterials via the collective behavior, including a less complicated device fabrication process, superior mixture stacking, and tunable optoelectronic properties. [14][15][16][17][18][19][20] For example, the cocrystals established via solution processes of fullerenes with porphyrin, metalloporphyrin, or sulfur-bridged annulene exhibited distinct charge transfer characteristics. 10,[21][22][23][24][25][26] In addition, linear acenes (naphthalene, anthracene, tetracene, and pentacene) were also widely used for building the chargetransfer heterojunction system with fullerene.…”