Abstract
AbstractThe hole‐conductor‐free printable mesoscopic perovskite solar cells based on the inorganic scaffolds of mesoporous titania, mesoporous zirconia, and porous carbon have attracted much attention due to their excellent stability and low manufacturing cost. However, in such hole‐conductor‐free devices, the transport of the photogenerated holes is dominated by the diffusion‐assisted charge carrier movement, while the driving force is insufficient. Reinforcing the built‐in electric field (BEF) is an effective strategy to promote oriented carrier transport. Herein, by using an optimized two‐step deposition method, the BEF is reinforced by creating a work function difference of perovskite (Δµ) in different layers via a gradient self‐doping. The enhanced BEF improves the hole transport and extraction, and significantly reduces the carrier recombination losses in the device. As a result, an average open‐circuit voltage improvement over 60 mV and a power conversion efficiency of 17.68% are achieved without any additives or complex processes. This strategy provides a new approach toward fabricating highly efficient printable mesoscopic perovskite solar cells with reduced carrier recombination losses.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.