Low band gap polymers for application in solar cells: synthesis and characterization of thienothiophene–thiophene copolymers

Polymers with Alkylsulfanyl Side Chains for Bulk Heterojunction Solar Cells: Toward a Greener Strategy

“…Taking the move from these studies and from those carried out in our group on alkylsulfanyl‐substituted polythiophenes and copolymers (that generally show improved solubility, filmability, and absorption properties in comparison to the plain alkyl‐substituted ones), in this full paper we present a systematic study of the effect of the insertion of (alkylsulfanyl)thienyl motifs in the conjugated phenylene‐cyanovinylene backbone built through Knoevenagel polycondensation. The newly synthesized polymers ( P1 , P2 , and P3 ) were easily soluble in organic solvents and displayed a decreased band gap with respect to those reported for similar materials carrying alkyl groups on the thiophene rings, with a positive influence on their aggregation, absorption and photovoltaic performances.…”

Polymer design for solar cell – Current trend and future scenario

“…Morvillo et al synthesised octylsulphanyl flanked bithiophene with thienothiophene units substituted with keto (P18) or ester (P19) groups. The polymers showed good solubility in common organic solvent and moderate solvatochromism [31]. Incorporation of germanium (Ge) in place of sulphur (S) in polythiophene creates a longer C-Ge bond length and influence the PSC performance.…”

ITO-free Anode with Plasmonic Silver Nanoparticles for High Efficient Polymer Solar Cells

“…Polymer solar cells (PSCs) are a promising alternative to silicon-based devices because they have several advantages like the good flexibility, the light-weight and the low-cost manufacturing that can be reached by roll-toroll printing and coating techniques [1][2][3][4]. Recently, power conversion efficiency (PCE) surpassing 9% has been reported [5].…”