Development of bis(arylimino)acenaphthene (BIAN) copper complexes as visible light harvesters for potential photovoltaic applications

Abstract

Readily synthesized, new bis(arylimino)acenaphthene copper(i) complexes exhibit panchromatic light absorption to the NIR region and function in dye-sensitized solar cells.

Square-Planar Heteroleptic Complexes of α-Diimine-NiII-Catecholate Type: Intramolecular Ligand-to-Ligand Charge Transfer

“…In particular, pioneer investigations were aimed at testing of the six-coordinated thiocyanato Ru II MLCT chromophores, containing (1) diimines equipped with anchor groups (for instance, phosphonate and carboxylate fragments), (2) ancillary ligands (usually substituted bipyridines and terpyridines) [47,48]. In recent years, a novel trend has spread-using of square-planar LL'CT compounds of Pd [53,54], Pt [22,[55][56][57], Cu [49,58], Ni [53,54,59,60] as materials for DSSCs. Research in the field of the molecular design of the square-planar sensitizers is carried out in several directions following existing problems in photovoltaic characteristics.…”

“…Research in the field of the molecular design of the square-planar sensitizers is carried out in several directions following existing problems in photovoltaic characteristics. A short lifetime of excited state for the square-planar first-row transition metal complexes can be raised by: (1) using of metal center with a full d-level-such approach was reported for the bis(arylimino)acenaphthene Cu I complexes [58]; (2) creating of a strong crystal field, as in the case of square-planar α-diimine-M II -dithiolate species-Ni II [60] and Pt II [57] complexes. Incorporation of electron-withdrawing anchor functions, primarily of a carboxylate type [60], into the diimine fragment facilitates an attachment of sensitizers into the semiconductor surface.…”

Application of Discrete First‐Row Transition‐Metal Complexes as Photosensitisers

“…For example, Cu(I) complexes with bis (arylimino)acenaphthene (BIAN) ligands (6) have been found to be efficient PSs for use in dye-sensitised solar cells. [43] Further, Cu(I) PSs with phenanthroline-and bipyridine-based ligands (7) can be used as Cu-dye-sensitisers ( Figure 6). [44][45] Moreover, Cu PSs have shown encouraging properties for application in PDT.…”

“…In recent efforts to replace precious metal PSs in photovoltaic applications, Cu complexes have been investigated as viable alternatives. For example, Cu(I) complexes with bis(arylimino)acenaphthene (BIAN) ligands ( 6 ) have been found to be efficient PSs for use in dye‐sensitised solar cells [43] . Further, Cu(I) PSs with phenanthroline‐ and bipyridine‐based ligands ( 7 ) can be used as Cu‐dye‐sensitisers (Figure 6).…”

Synthesis, characterization, and photoluminescent studies of three-coordinate Cu(i)–NHC complexes bearing unsymmetrically-substituted dipyridylamine ligands

“…48 Additionally, the broad band between 350 and 480 nm could be assigned to the intraligand p-p* charge transfer (ILCT) from the aryl groups to the naphthyl backbone and/or a low-energy MLCT band. 48,49 The PL spectra of the complexes were recorded in solid state at room temperature using an excitation of 340 nm. As shown in Fig.…”