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

▲ [10a-PB1-17] Effect of TiCl4 Treatment on Low-Temperature Processed Brookite TiO2 Nanoparticle Layers for Electron Transport Layer of Efficient Planar Perovskite Solar Cells

〇(M2)Visal Sem¹, Shahiduzzaman Md^2,1, Kuniyoshi Mizuki¹, Kaneko Tetsuya¹, Katsumata Tetsuhiro¹, Iwamori Satoru¹, Tomita Koji¹, Isomura Masao¹ (1.Tokai Univ., 2.Kanazawa Univ.)

Keywords:Brookite TiO2 nanoparticles, Planar perovskite solar cells, low temperature process

Interface modification of the electron transport layer (ETL) plays a key strategy to produce efficient planar perovskite solar cells (PSCs). Herein, we demonstrate high-phase-purity, single crystalline, and low temperature (180 ºC) processed brookite TiO2 nanoparticle scaffold layer as the compact ETL, followed by TiCl4 treatment with different concentrations of 40mM, 60mM and 80mM in planar PSCs. An entire perovskite fabrication process was done in the low temperature process. The optimum concentration of TiCl4 was 40mM and results in the best improvement of charge transfer between the perovskite to ETL layer (BK TiO2 NPs has a single crystalline 30nm spherical shape), for which a maximum power conversion efficiency of 15.49% (reverse scan) was obtained.