Conjugated poly-ynes and poly(metalla-ynes) incorporating thiophene-based spacers for solar cell (SC) applications

Abstract

Solar cells (SCs) are of considerable current research interest because of their potential as a clean alternative to fossil fuels. Researchers across the globe are developing novel polymeric materials with enhanced power conversion efficiency (PCE). Conjugated poly-ynes and poly(metalla-ynes) incorporating late transition metals and thiophene-based spacers have played a very important role in this strategic area of materials research. The performance of the SCs can be optimized by varying the conjugated spacers and/or the metal ions along the polymer backbone. Therefore, an analysis of structure-photovoltaic property relationships in poly-ynes and poly(metalla-ynes) is desirable as a guide for the development of new functional materials for use in SCs. Keeping the importance of this strategic topic in mind, herein we present a brief review on conjugated poly-ynes and poly(metalla-ynes) incorporating thiophene-based spacers that have potential SC applications. Attempts have been made to correlate the photovoltaic performance of the SCs to the chemical structure of thiophene-incorporated poly-ynes and poly(metalla-ynes). The performance of SCs is also strongly influenced by other factors such as morphology and device structure.

Phosphorescent molecular metal complexes in heterojunction solar cells

“…A focus on discrete molecular complexes will be maintained, readers specifically interested in the use of metal containing polymers are directed to relevant literature. [93][94][95][96] Studies of complexes of a range of metals will be presented and are organized according to their group in the periodic table.…”

Recent Advances in π-Conjugated N^C-Chelate Organoboron Materials

“…Benzothiadiazole (BTD) is a well-known strong electron-acceptor and is used to develop highperformance donor-acceptor (D-A) materials. BTD-containing materials often possess low band gaps, intense absorption, and emission that extends to the visible to near infrared (NIR) region, and thus are considered as unique materials for opto-electronics (O-E) and other applications [52]. Besides, it has also been reported that HOMO-LUMO energy levels of N^C-chelate organoboron compounds Benzothiadiazole (BTD) is a well-known strong electron-acceptor and is used to develop high-performance donor-acceptor (D-A) materials.…”

Impact of the Alkyne Substitution Pattern and Metalation on the Photoisomerization of Azobenzene-Based Platinum(II) Diynes and Polyynes

“…All other bond parameters were found to be within the expected ranges for dimeric Pt(II) diyne complexes. [11][12]…”

“…The intramolecular bond parameters in M2 are similar to those in M1, and in related dinuclear diplatinum complexes. [11][12] Optical-absorption spectroscopy The room temperature solution absorption spectra of the Pt(II) di-ynes (M1-M3) and…”

“…Moreover, the role of the spacer group in the polymer structure is also well established, 11 with Pt(II) poly-ynes incorporating a wide range of conjugated aromatic and hetero-aromatic spacers having been investigated by us and by others. 12 In this work, we have explored the synthesis and characterization of di-and poly(platinaynes) incorporating both meta (m)-and para (p)-substituted azobenzene spacers.…”