An Effective Synthetic Approach to 2-(Hetero)Aryl-Substituted Thieno[3,2-b]Indoles, Based on the Fischer and the Fiesselmann Methods

This study was supported financially by the Russian Foundation for Basic Research (research Рroject № 18-33-20083 mol_a_ved), and the Scientific Council of the President of the Russian Federation (grant № МК-1460.2018.3)

TiO2 paste for DSSC photoanode: preparation and optimization of application method

Received: 27.03.2020. Accepted: 20.10.2020. Published:30.12.2020.We propose a simple method of TiO2 paste preparation from titania powder (Degussa) and organic binders (terpineol, ethyl cellulose) for making a continuous photoactive layer of a dye-sensitized solar cell (DSSC). The prepared paste was characterized by using thermogravimetric and X-ray diffraction methods for comparison with commercial paste (Solaronix). The TiO2 layer parameters for applying and annealing were optimized by varying the layer thickness and using different masks. The surface morphology of annealed layers was controlled by optical microscopy. Before TiO2 paste applying and after annealing, the conductive glass (fluorine-tin oxide — FTO) was treated by TiCl4 hydrochloric acid solution. The structure of DSSCs were composed FTOglass / TiO2 layer sensitized Ruthenium complex (N719 dye)/ iodide-based electrolyte / Pt counter electrode/ FTO glass. The DSSC photovoltaic characteristics were measured under AM 1.5G irradiation and demonstrated to be close to those of photoanodes based on the prepared and commercial pastes.The team of authors is grateful to the Russian Science Foundation for financial support, grant No. 17‑79‑20165. A. S Steparuk would like to acknowledge the financial support for the analytical studies of synthesized compounds from the Ministry of Education and Science of the Russian Federation within the framework of the State Assignment for Research (project no. AAAA-A19‑119012490006‑1)

NEW DYES BASED ON THIENO[3,2-b]INDOLE WITH AN EXTENDED Π-CONJUGATION SYSTEM FOR DYE-SENSITIZED SOLAR CELLS

This work was supported by the Russian Foundation for Basic Research, project # 22-73-00291

TECHNOLOGY FOR THE FORMATION OF THIN-FILM ANODES BASED ON TITANIUM DIOXIDE FOR GRETZEL SOLAR CELLS

To obtain high conversion efficiency of solar energy in Gretzel cells, many factors must be observed: transparency of the glass, heat resistance of the conductive layer, the formation of an electrically conductive contact between the conductive layer and the photoactive anode.Работа выполнена при финансовой поддержке РНФ, проект 17-79-20165

Pyrimidine-Based Push–Pull Systems with a New Anchoring Amide Group for Dye-Sensitized Solar Cells

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