Photo-assisted deposited titanium dioxide for all-inorganic CsPbI2Br perovskite solar cells with high efficiency exceeding 13.6

All-inorganic perovskite solar cells advancing in phase and thermal stability are regarded as promising candidates for high-performance optoelectronic application. Herein, a photo-assisted deposited titanium dioxide was designed and utilized as the electron-transporting layer. Photo-assisted deposited titanium dioxide demonstrated a low interfacial recombination rate and high carrier extraction efficiency. Consequently, CsPbI2Br-based all inorganic perovskite solar cells exhibit power conversion efficiencies of up to a value of 13.69%. This photo-assisted deposition method is a promising approach for scalable, convenient, and inexpensive fabrication in the future.