[9p-S302-1~6] 12.5 Organic and hybrid solar cells

4:45 PM - 5:00 PM JST(7:45 AM - 8:00 AM UTC)

[9p-S302-4] Perovskite Solar Cells Using π-Conjugated Polymers as Hole Transporting Layer (II) -Effect of Diethyl Phosphonate Group-

〇(M1)Toranosuke Higashi¹, Masahiro Fujita¹, Masahiro Rikukawa¹, Yuko Takeoka¹ (1.Sophia Univ.)

Keywords:

Perovskite Solar Cells,Hole Transporting Layer,Conjugated Polymers

Dopant-free π-conjugated polymers are investigated as hole transport materials for perovskite solar cells (PSCs). Poly(3-hexylthiophene) (P3HT) exhibits high crystallinity and tends to adopt a parallel orientation of the main chain, which is unfavorable for charge transport. In a previous study, poly[3-(6-bromohexyl) thiophene]-b-poly(3-hexylthiophene) (PBHT₃₅HT₃₂) was used as hole transport material, resulting in increased power conversion efficiency compared to devices using P3HT. In this study, with the aim of improving solar cell performance, poly[3-(6-diethylphosphonate)hexylthiophene]-b-poly(3-hexylthiophene) (PEPHT₃₅HT₃₂) was synthesized by phosphonate esterification of PBHT₃₅HT₃₂, and the effect of the diethylphosphonate group on the photovoltaic properties was investigated.