[23a-B103-1~12] 12.5 Organic solar cells

▲ [23a-B103-9] Inorganic hole extraction layer enables highly efficient Sn-based Perovskite Solar Cells

〇(P)Liang Wang¹, Qing Shen¹, Shuzi Hayase¹ (1.The Univ. of Electro-Communications)

Keywords:perovskite solar cell

Sn-based perovskite solar cells (PSCs) shows the best power conversion efficiency among all Pb-free-based PSCs due to its ideal narrow bandgap (1.4eV), small exciton binding energy, high carrier mobility and environment friendly. It becomes a potential candidate to replace toxic Pb-based perovskite. Commonly, inverted device structure with PEDOT:PSS as hole transport layer (HTL) are broadly used in Sn-based PSCs. However, the sensitivity of humidity and acidity of PEDOT:PSS limits the improvement of Sn-based PSCs stability and performance because of its nature of Lewis acidity. Therefore, searching inorganic HTL materials is also an important part for industrial application due to their intrinsic stability and low cost. In this study, an inorganic HTL was in-situ prepared by simple method and applied for Sn-based PSCs directly. It shows rapid carrier transportation from perovskite to HTL than that of PEDOT:PSS based. Finally, a 11.97 % power conversion efficiency was obtained, which is comparable to PEDOT:PSS based device (11.68 %).