Exploring Bismuth Coordination Complexes as Visible-Light Absorbers: Synthesis, Characterization, and Photophysical Properties.

Bismuth-based coordination complexes are advantageous over other metal complexes, as bismuth is the heaviest nontoxic element with high spin-orbit coupling and potential optoelectronics applications. Herein, four bismuth halide-based coordination complexes [BiCl(phen-thio)] (), [BiBr(phen-thio)] (), [BiI(phen-thio)] (), and [BiI(phen-Me)] () were synthesized, characterized, and subjected to detailed photophysical studies. The complexes were characterized by single-crystal X-ray diffraction, powder X-ray diffraction, and NMR studies.

One-Step Synthesis of Precursor Oligomers for Organic Photovoltaics: A Comparative Study between Polymers and Small Molecules.

Two series of oligomers TQ and rhodanine end-capped TQ-DR were synthesized using a facile one-step method. Their optical, electrical, and thermal properties and photovoltaic performances were systematically investigated and compared. The TQ series of oligomers were found to be amorphous, whereas the TQ-DR series are semicrystalline.

A new thiophene substituted isoindigo based copolymer for high performance ambipolar transistors.

A novel thiophene substituted isoindigo and its copolymer with benzothiadiazole have been synthesized. The polymer with low lying LUMO energy levels exhibits excellent ambipolar behavior in field effect transistors with both hole and electron mobilities recorded over 0.1 cm(2) V(-1) s(-1).