Donor–Acceptor Hybrid Heterostructures: An Emerging Class of Photoactive Materials with Inorganic and Organic Semiconductive Components

Abstract

Just as the heterojunctions in physics, donor–acceptor (D‐A) heterostructures are an emerging class of photoactive materials fabricated from two semiconductive components at the molecular level. Among them, D‐A hybrid heterostructures from organic and inorganic semiconductive components have attracted extensive attention in the past decades due to their combined advantages of high stability for the inorganic semiconductors and modifiability for the organic semiconductors, which are particularly beneficial to efficiently achieve photoinduced charge separation and transfer upon irradiations. In this review, by analogy with the heterojunctions in physics, a definition of the D‐A heterostructures and their general design and synthetic strategies are given. Meanwhile, the D‐A hybrid heterostructures are focused on and their recent advances in potential applications of photochromism, photomodulated luminescence, and photocatalysis summarized.

A viologen-based Cd(ii) coordination polymer as a multifunctional platform for photochromism, chemochromism and a broad range of fluorescence pH sensing

“…The electron-deficient nature of the viologen moiety makes them highly suited for electron transfer (ET), charge transfer (CT) and energy transfer (EnT) with other chromophores, which are typically accompanied by color change or luminescence quenching phenomena. 12–14 Furthermore, compared to other photochromic molecules, viologen derivatives are more versatile molecular building units. Since the photochromic behavior of viologen derivatives is mainly associated with electron transfer without structural transformation, they can be integrated inside a CP matrix as a part of a framework backbone, a ligand side pendant or a guest molecule.…”

Recent advances in small molecular near-infrared fluorescence probes for a targeted diagnosis of the Alzheimer disease

“…The synthesis of NIR probes often involves conjugation and polymerization of different donor and acceptor units, and this generally leads to a relatively large molecular weight for the synthesized probes. 72 However, it is much more difficult for large molecules to cross the tight BBB than small molecules. Therefore, researchers have devoted efforts to formulating different NIRF small probes for AD diagnosis.…”

Mussel-Inspired Two-Dimensional Halide Perovskite Facilitated Dopamine Polymerization and Self-Adhesive Photoelectric Coating

“…Compared with 3D HOIPs, two-dimensional (2D) HOIPs have relaxed steric constraints. Thus, the choice of inorganic ions (e.g., Cu 2+ , Pb 2+ , Eu 2+ , Sn 2+ ) and organic ions (e.g., dye cation and phenyl-methylammonium cation) in 2D HOIPs are much more abundant than that in 3D HOIPs. − For instance, oligothiophenes were used to tailor the band structure of 2D HOIPs at the molecular level. , In addition, the postprocessing of organic cations including polymer crosslink can greatly modify the properties of 2D HOIPs …”