Light soaking (LS) has been reported to positively influence the device performance of perovskite solar cells (PSCs), which, however, could be potentially harmful to the loaded devices due to the unstable output. There are very few reports on controls over the LS effect, especially in all-inorganic PSCs. In this work, we present a remarkable LS induced performance enhancement of CsPb(I1-xBrx)3 based PSCs.… Read More

The bulk-heterojunction morphology of organic solar cells is well recognized to be critical to the device performance and has received extensive research efforts in developing viable morphology tuning strategies. In this work, we present a morphology tuning approach for the molecular packing orientation, that is, through the ternary mixing of a donor polymer FTAZ with two distinctly oriented non-fullerene acceptors, IDIC and INIC3.… Read More

Two-step fabricated FAPbI₃-based perovskites have attracted increasing attention because of their excellent film quality and reproducibility. However, the underlying film formation mechanism remains mysterious. In this work, the crystallization kinetics of a benchmark FAPbI₃-based perovskite film with sequential A-site doping of Cs⁺ and GA⁺ has been revealed by in situ X-ray scattering and first-principles calculations.… Read More

Charge transport mechanism in nanocrystal (NC) films is known to be very different from that in the bulk films. The charge transport in halide perovskite-NC films is further complicated due to the ionic nature of perovskites. In this work, we fabricate all-inorganic CsPbBr₃ NCs terminated with short ligands into field effect transistors, which provides a facile platform to study the charge transport mechanism systematically.… Read More