Wang, HailuFang, WangXu, TengfeiXia, HuiXie, RunzhangZhou, XiaohaoGe, XunLiu, WeiweiZhu, YichengSun, LiaoxinFu, Lan2023-05-081530-6984http://hdl.handle.net/1885/289917Hot carrier harvest could save 30% energy loss in solar cells. So far, however, it is still unreachable as the photoexcited hot carriers are short-lived, ∼1 ps, determined by a rapid relaxation process, thus invalidating any reprocessing efforts. Here, we propose and demonstrate a feasible route to reserve hot electrons for efficient collection. It is accomplished by an intentional mix of cubic zinc-blend and hexagonal wurtzite phases in III-V semiconductor nanowires. Additional energy levels are then generated above the conduction band minimum, capturing and storing hot electrons before they cool down to the band edges. We also show the superiority of core/shell nanowire (radial heterostructure) in extracting hot electrons. The strategy disclosed here may offer a unique opportunity to modulate hot carriers for efficient solar energy harvest.This work was supported by National Natural Science Foundation of China (Grants 11991063, 62004207, 62074085, and 62104118), International Partnership Program of Chinese Academy of Sciences (Grant 181331KYSB20200012), Royal Society-Newton Advanced Fellowship (Grant NA170214), Shanghai Science and Technology Committee (Grants 18JC1420401 and 20YF1455900), Special Research Assistant Grant from the Chinese Academy of Sciences Foundation (Grant 2019-169), Strategic Priority Research Program of Chinese Academy of Sciences (Grant XDB43010200) and Youth Innovation Promotion Association of the Chinese Academy of Sciencesapplication/pdfen-AU© 2021 American Chemical Societymix-phase nanowirehot electronsInAsradial heterostructurephotovoltaics202110.1021/acs.nanolett.1c027252022-02-13