[20a-PB2-1~59] 12.5 Organic solar cells

▲ [20a-PB2-19] Double layered perovskites by surface molecular engineering to achieve high efficiency dopant-free P3HT based HTM perovskite solar cells

〇Januardana Hanung Pradita¹, Kulkarni Ashish¹, Ikegami Masashi¹, MIyasaka Tsutomu¹ (1.Toin Univ. of Yokohama)

Keywords:Perovskite Solar Cells, Poly(3-hexylthiophene), Dopant-free HTM

Poly(3-hexylthiophene) (P3HT) is a widely used alternative organic HTM with excellent electric conductivity and easily fabrication method compare to the previously stated HTM, but suffering lower open-circuit voltage (Voc) due to additional non-radiative recombination at the perovskite/P3HT interlayer. Another study has also revealed that flat P3HT surface provide physically poor contact constrain efficient hole transport from perovskite to P3HT. To tackle these issues, here we report the use of hydrophobic secondary alkyl ammonium cation and methylamine oxide can be successfully assembled to form very thin insulating layer from perovskite surface itself simply by in situ reaction.Therefore these work not only trying to tackle the low PCE problem but also generate a strategy to improve stability by modifying the interface of perovskite/P3HT.