Zhan, Thickness-dependent photovoltaic performance of TiO 2 blocking layer for perovskite solar cells. Heeger Alan, Efficient perovskite hybrid photovoltaics via alcohol-vapor annealing treatment. Chen, Pure- or mixed-solvent assisted treatment for crystallization dynamics of planar lead halide perovskite solar cells. Park, Growth of CH 3NH 3PbI 3 cuboids with controlled size for high-efficiency perovskite solar cells. Wu, Fast crystallization and improved stability of perovskite solar cells with zn 2sno 4 electron transporting layer: interface matters. Yang, Interface engineering of highly efficient perovskite solar cells. Snaith, Efficient planar heterojunction perovskite solar cells by vapour deposition. Lam, Perovskite-based solar cells: impact of morphology and device architecture on device performance. Park, 6.5% Efficient perovskite quantum-dot-sensitized solar cell. High charge carrier mobilities and lifetimes in organolead trihalide perovskites. Dimitrakopoulos, Organic-inorganic hybrid materials as semiconducting channels in thin-film field-effect transistors. Kanatzidis, From unstable CsSnI 3 to air-stable Cs 2SnI 6: a lead-free perovskite solar cell light absorber with bandgap of 1.48 eV and high absorption coefficient. Herz, Charge-carrier dynamics in vapour-deposited films of the organolead halide perovskite CH 3NH 3PbI 3−xC lx. Seok, Efficient inorganic–organic hybrid heterojunction solar cells containing perovskite compound and polymeric hole conductors. Park, Lead iodide perovskite sensitized all-solid-state submicron thin film mesoscopic solar cell with efficiency exceeding 9%. Seo, A fluorene-terminated hole-transporting material for highly efficient and stable perovskite solar cells. Miyasaka, Organometal halide perovskites as visible-light sensitizers for photovoltaic cells. Agert, Integration of renewable energy sources in future power systems: the role of storage. Lewis, Toward cost-effective solar energy use. Such results have a certain guiding effect on solving interface defects and carrier recombination. As a result, average power conversion efficiency enhanced from 11.20 to 13.76% under ambient conditions, which realized almost a quarter improvement than the devices based on pure mesoporous TiO 2 layers. Furthermore, photoluminescence spectra and electrochemical impedance spectroscopy verified that our core–shell scaffold material contributes to accelerate carrier separation and retard carrier recombination. Moreover, better optical absorption and larger fill factor were obtained in this manner by the reason of larger CH 3NH 3PbI 3 grain size and fewer crystal boundaries. Ultrathin BaTiO 3 shell layer can combine better with CH 3NH 3PbI 3 layer so as to reduce the existence of carrier recombination centers. In this paper, we replaced mesoporous TiO 2 nanoparticles scaffold layers by BaTiO 3-coated TiO 2 core–shell nanoparticles films which obtained by treating pure mesoporous TiO 2 layers with 1.0 wt% barium nitrate solution, successfully realized the aim of optimizing interfaces bonding at TiO 2/CH 3NH 3PbI 3.

Core shell scaffold