Li, Wenbin; Sidhik, Siraj; Traore, Boubacar; Asadpour, Reza; Hou, Jin; Zhang, Hao; Fehr, Austin; Essman, Joseph; Wang, Yafei; Hoffman, Justin M.; Spanopoulos, Ioannis; Crochet, Jared J.; Tsai, Esther; Strzalka, Joseph; Katan, Claudine; Alam, Muhammad A.; Kanatzidis, Mercouri G.; Even, Jacky; Blancon, Jean-Christophe; Mohite, Aditya D. published the artcile< Light-activated interlayer contraction in two-dimensional perovskites for high-efficiency solar cells>, Name: Pyridin-4-ylmethanamine, the main research area is light activated interlayer contraction 2D perovskite solar cell.
Abstract: Understanding and tailoring the phys. behavior of halide perovskites under practical environments is critical for designing efficient and durable optoelectronic devices. Here, we report that continuous light illumination leads to >1% contraction in the out-of-plane direction in two-dimensional hybrid perovskites, which is reversible and strongly dependent on the specific superlattice packing. XPS measurements show that constant light illumination results in the accumulation of pos. charges in the terminal iodine atoms, thereby enhancing the bonding character of inter-slab I-I interactions across the organic barrier and activating out-of-plane contraction. Correlated charge transport, structural and photovoltaic measurements confirm that the onset of the light-induced contraction is synchronized to a threefold increase in carrier mobility and conductivity, which is consistent with an increase in the electronic band dispersion predicted by first-principles calculations Flux-dependent space-charge-limited current measurement reveals that light-induced interlayer contraction activates interlayer charge transport. The enhanced charge transport boosts the photovoltaic efficiency of two-dimensional perovskite solar cells up to 18.3% by increasing the device′s fill factor and open-circuit voltage.
Nature Nanotechnology published new progress about Band gap. 3731-53-1 belongs to class pyridine-derivatives, and the molecular formula is C6H8N2, Name: Pyridin-4-ylmethanamine.