1:30 PM - 3:30 PM
▲ [20p-PB4-19] Interface Modification of TiO2 in Planar Perovskite solar Cells using low-temperature Brookite TiO2 Nanoparticles
Keywords:Planar Perovskite Solar Cells, Interface Engineering, Low temperature BK-TiO2
Hybrid organometal halide perovskites solar cells (PSCs) have attracted much attention in the third-generation of thin-film photovoltaic. Interface modification turns a promising strategy to yield highly efficient planar heterojunction (PHJ) PSCs. The deep trap states on the compact-TiO2 surface results in a huge leakage current and recombination of charge carriers. To solve the problems, the interfacial engineering of electron transport layer (ETL) compact TiO2 was conducted by coating a low-temperature single crystalline brookite (BK) TiO2 nanoparticles (NPs) with average diameter sizes about 30 nm, which causes a uniform and pin-hole-free layer. Herein, the compact TiO2/BK-TiO2 NPs bilayers were formed by spray pyrolysis (SP) deposition and spin coating (SC) process, respectively, and applied to PSCs as an ETL.