有機・無機ハイブリットペロブスカイト薄膜太陽電池の研究《若手研究者の紹介》

The pore-free and compact FA0.8Cs0.2PbI3 organic-inorganic perovskite films were fabricated by a two-step method using reaction of a porous PbI2-(CsI)0.2 thin film with FAI 2-propanol solution. The thin films were characterized by XRD, UV-Vis absorption, FESEM, and AFM. The thin films were applied in planar structure solar cells, giving a maximum PCE of 14.7% with VOC of 1.02 V, JSC of 21.4 mA cm-2, and FF of 67.5 % in reverse scan. Further, uniform surfaces with minimal roughness FA0.8Cs0.2PbI3 thin films by one-step method using 1-Cyclohexyl-2-pyrrolidone having a high boiling point and a low vapor pressure as additive.