[14a-303-1~10] 12.5 Organic solar cells

[14a-303-6] Improvement of Open-circuit Voltage in Perovskite Solar Cells by Using Methano-Indene-Fullerene (MIF)

〇Yutaka Matsuo^1,2 (1.Univ. of Tokyo, 2.USTC)

Keywords:Organic Solar Cells, Fullerene, Perovskite

Methano-indene-fullerene has been used in polymer/fullerene organic solar cells^[1] and small-molecule organic solar cells^[2] to have high open-circuit voltage (V_OC). Methano and indeno addends reduces the π-conjugation of fullerene for a higher lying LUMO level, giving high V_OC values >1.0 V without any significant loss in short-circuit current density (J_SC) and fill factor (FF) due to the small volume of the indeno group that can provide short fullerene–fullerene contact distance for high electron mobility. In this presentation, we will discuss the use of MIF in the inverted planar NiO-diethanolamine/CH₃NH₃PbI₃/fullerene p–i–n solar cells.^[3] Compared the using PCBM, V_OC increased to 1.13 V because of the energy loss at the interface between perovskite and fullerene layers.