[16p-M_124-1~16] 12.5 Organic and hybrid solar cells

3:45 PM - 4:00 PM JST(6:45 AM - 7:00 AM UTC)

[16p-M_124-7] Formation of Electron-Collection-Favorable Band BendingInduced by Fullerene Infiltration and Halide Ion Migration in Perovskite Solar Cells

〇Ryota Tozaki¹, Masato Iwasawa², Aruto Akatsuka¹, Hiroyuki Yoshida^1,3 (1.Chiba Univ., 2.Nissan Chemical, 3.Chiba Univ.)

Keywords:

Perovskite Solar Cells,Fullerene

To clarify why fullerene derivatives, such as C₆₀, exhibit high power conversion efficiency (PCE) as electron collection layers in inverted perovskite solar cells, the infiltration behavior and interfacial structures of C₆₀ and PTCDA, with similar electron affinities, were compared on MAPbI₃. GCIB-SIMS and SEM analyses revealed that C₆₀ infiltrates MAPbI₃ more rapidly and that an I-rich layer is formed on the surface of the C₆₀ sample due to the segregation of I^- ions. These results suggest that the combined effects of C₆₀ infiltration and halide ion migration induce band bending, thereby enhancing electron collection properties.