Achieving >23% Efficiency Perovskite Solar Minimodules with Surface Conductive Coordination Polymer
Abstract
AbstractDespite the reported high efficiencies of small‐area perovskite photovoltaic cells, the deficiency in large‐area modules has impeded the commercialization of perovskite photovoltaics. Enhancing the surface/interface conductivity and carrier‐transport in polycrystalline perovskite films presents significant potential for boosting the efficiency of perovskite solar modules (PSMs) by mitigating voltage losses. This is particularly critical for multi‐series connected sub‐cell modules, where device resistance significantly impacts performance compared to small‐area cells. Here, an effective approach is reported for decreasing photovoltage loss through surface/interface modulation of perovskite film with a surface conductive coordination polymer. With post‐treatment of meso‐tetra pyridine porphyrin on perovskite film, PbI2 on perovskite film reacts with pyridine units in porphyrins to generate an iso‐structural 2D coordination polymer with a layered surface conductivity as high as 1.14 × 102 S m−1, due to the effect of surface structure reconstruction. Modified perovskite film exhibits greatly increased surface/interface conductivity. The champion PSM obtains a record efficiency up to 23.39% (certified 22.63% with an aperture area of 11.42 cm2) featuring only 0.33‐volt voltage loss. Such a modification also leads to substantially improved operational device stability.
Article Details
Authors (10)
Guo‐Bin Xiao
State Key Laboratory of Natural Product Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province College of Chemistry and Chemical Engineering Lanzhou University Lanzhou P. R. China
Zhen‐Yang Suo
State Key Laboratory of Natural Product Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province College of Chemistry and Chemical Engineering Lanzhou University Lanzhou P. R. China
Xijiao Mu
State Key Laboratory of Natural Product Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province College of Chemistry and Chemical Engineering Lanzhou University Lanzhou P. R. China
Houen Wu
State Key Laboratory of Natural Product Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province College of Chemistry and Chemical Engineering Lanzhou University Lanzhou P. R. China
Runmin Dong
State Key Laboratory of Natural Product Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province College of Chemistry and Chemical Engineering Lanzhou University Lanzhou China
Fei Song
Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute
Xingyu Gao
Liming Ding
School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou China
Yiying Wu
Department of Chemistry and Biochemistry The Ohio State University 100 West 18th Avenue Columbus OH 43210 USA
Jing Cao