Presentation Information

[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.