Color‐ and Dimension‐Tunable Light‐Harvesting Organic Charge‐Transfer Alloys for Controllable Photon‐Transport Photonics

Abstract

An electron donor/acceptor pair comprising perylene (Pe) and 9,10‐dicyanoanthracene (DCA) was specifically designed to construct organic charge‐transfer (CT) alloys via weak CT interaction through a solution co‐assembly route. By adjusting the molar ratio between Pe and DCA, we achieve color‐ and dimension‐tunable CT alloy assemblies involving one‐dimensional (1D) (DCA)1−x(Pe)x (0 ≤ x ≤10 %) microribbons and two‐dimensional (2D) (Pe)1−y(DCA)y (0 ≤ y ≤5 %) nanosheets as a consequence of energy transfer from DCA or α‐Pe to Pe‐DCA CT complex. Importantly, dimension‐related optical waveguiding performances are also revealed: continuously adjustable optical loss in 1D (DCA)1−x(Pe)x microribbons and successive conversion from isotropic waveguide to anisotropic waveguide in 2D (Pe)1−y(DCA)y nanosheets. The present work provides a desired platform for in‐depth investigation of light‐harvesting organic CT alloy assemblies, which show promising applications in miniaturized optoelectronic devices.

Lattice-mismatch-free growth of organic heterostructure nanowires from cocrystals to alloys

“…7 ). However, based on the structurally similar OFN (5.498 Å) and TFPA (5.430 Å) molecules, and competitive intermolecular interaction including arene-perfluoroarene (AP) and charge-transfer (CT) interactions, we infer that both of the OFN and TFPA can replace each other, which provides the possibility for the formation of organic alloys 48 . As a proof of the concept, we selected BGP-OFN co-crystal as the host material, and then added a small amount of TFPA molecules to prepare BGP-OFN (1-x) -TFPA (x) organic solid solution.…”

“…Furthermore, alloys with novel properties tend to have the same crystal lattice as the host material, at the level of a large number of guest addition to the host material. 48 . In view of excellent compatibility of the structure, the organic alloy strategy can solve the problem of lattice mismatch and provide the possibility for the large-scale fabrication of OHSs.…”

A General Synthetic Approach of Organic Lateral Heterostructures for Optical Signal Converters in All-Color Wavelength

“…In this work, we report a generalizable mix-and-match synthetic strategy to organic heterostructures with tunable structure and optical properties, that combines the organic solid solutions 32 and the heterostructures (Figure . 1a).…”

Molecular solid solutions for advanced materials – homeomorphic or heteromorphic

“…A solid solution of the π-molecules can change solid colours by mixing ratios. [56][57][58][59] Two π-molecules, BA and BN (Fig. 7c), form a solid solution (BA) x (BN) 1−x with continuously varied x, and unique twocolour-emitting core-shell type BA@(BA) x (BN) 1−x structures are formed by the epitaxial growth of (BA) x (BN) 1−x on the surface of the BA crystal.…”