New donor–π–acceptor pyrimidine-based dyes comprising an amide moiety as an anchoring group have been designed. The dyes were synthesized by sequential procedures based on the microwave-assisted Suzuki cross-coupling and bromination reactions. The influence of the dye structure and length of π-linker on the photophysical and electrochemical properties and on the photovoltaic effectiveness of dye-sensitized solar cells was investigated. An increase in efficiency with a decrease in the length of π-linker was revealed. The D1 dye with only one 2,5-thienylene-linker provided the highest power conversion efficiency among the fabricated dye sensitized solar cells.

New small molecule D–π–A compounds, bearing thieno[3,2-b]indole and benzo[b]thieno[2,3-d]thiophen-3(2H)-one scaffolds, were prepared, characterized and utilized as electron transport materials in perovskite solar cells.

A single protocol for the construction of various selenopheno[3,2-b]indole-cored molecules from appropriate 3-aminoselenophene substrates using Fischer indolization was elaborated in this study.

Synthesis of the bis[1,2,4]triazolo[4,3-b:3,4-f][1,2,4,5]tetrazines as well as a study of the basic optical, electrochemical and charge-transport properties of new compounds.