公开(公告)号：US20240006129A1

公开(公告)日：2024-01-04

申请号：US18031405

申请日：2021-10-11

Applicant: The Trustees of Princeton University

Inventor： Tianran LIU ,  Xiaoming ZHAO ,  Lynn LOO

IPC: H01G9/20 ,  H01L31/0392 ,  H01L31/0264

CPC classification number: H01G9/20 ,  H01L31/0264 ,  H01L31/03928

Abstract: Transparent UV-absorbing solar cells are promising for the applications of powering electrochromic windows that regulate the transmission of visible and near-infrared photons for natural lighting and heating purposes, respectively. Current technologies focus on using organic solar cells for the application due to their narrow excitonic absorption and tunable bandgaps. However, transparent organic solar cells have drawbacks including the stability issue and thickness-induced problems, such as low yield rate and limited power conversion efficiency. Disclosed herein is the co-deposition of two or more materials by thermal evaporation to make visibly transparent inorganic perovskite films. By tuning the halide compositions, the inorganic perovskite films show absorption range in UV and near-UV region, which is well-suited to the application. Its high conductivity and absorbance enable it to be around 400 nm thick for devices, which is critical to improve the yield rate and efficiency. The solar cells based on the inorganic perovskite active layers show higher power conversion efficiency and higher transparency than state-of-art UV absorbing solar cells. The disclosed approach is not limited to the exemplary embodiment employing inorganic perovskite, and can employ, e.g., inorganic, organic and hybrid perovskite.