[10a-PB1-1~34] 12.5 Organic solar cells

[10a-PB1-14] Improvement of open circuit voltage in MAPbI₃ perovskite solar cells by suppressing the energy shift of a PEDOT:PSS hole transport layer

〇Takashi Fujihara^1,2, Shun Sugawara³, Shinichi Maeda³, Yuko Shimoi¹, PangPang Wang¹, Shinichiro Kobayashi², Chuanjiang Qin⁴, Toshinori Matsushima⁴, Tadayuki Isaji³, Yoshinori Kasai³, Masayuki Yahiro^1,2, Adachi Chihaya^1,2,4 (1.ISIT, 2.I3-OPERA, 3.Nissan Chem., 4.OPERA Kyushu Univ.)

Keywords:perovskite solar cells, Open circuit voltage, Energy Shift

In perovskite solar cells, the undesirable energy shift of HOMO level of PEDOT:PSS is often caused by the effect that Methylammonium cation reduces the PEDOT:PSS. As a result, the open circuit voltage of MAPbI₃ perovskite solar cells based on PEDOT:PSS is lower than those based on other structure. In this study, the significant improvement of the open circuit voltage and the corresponding power conversion efficiency was achieved by employing the additive and introducing it to the PEDOT:PSS layer.