Antimony selenide(Sb_(2)Se_(3))semiconducting material possesses a band gap of 1.05-1.2 eV and has been widely applied in single-junction solar cells.Based on its band gap,Sb_(2)Se_(3)can also be used as the bottom ce...Antimony selenide(Sb_(2)Se_(3))semiconducting material possesses a band gap of 1.05-1.2 eV and has been widely applied in single-junction solar cells.Based on its band gap,Sb_(2)Se_(3)can also be used as the bottom cell absorber material in tandem solar cells.More importantly,Sb_(2)Se_(3)solar cells exhibit excellent stability with nontoxic compositional elements.The band gap of organic-inorganic hybrid perovskite is tunable over a wide range.In this work,we demonstrate for the first time a perovskite/antimony selenide four-terminal tandem solar cell with a specially designed and fabricated transparent electrode for an optimized spectral response.By adjusting the thickness of the transparent electrode layer of the top cell,the wide-band-gap perovskite top solar cell achieves an efficiency of 17.88%,while the optimized antimony selenide bottom cell delivers a power conversion efficiency of 7.85%by introducing a double electron transport layer.Finally,the four-termi-nal tandem solar cell achieves an impressive efficiency exceeding 20%.This work provides a new tandem device structure and demonstrates that antimony selenide is a promising absorber material for bottom cell applications in tandem solar cells.展开更多
基金supported by the National Key Research and Development Program of China(Grant No.2019YFA0405600)National Natural Science Foundation of China(Grant No.22275180)+2 种基金School-Local Cooperation Industrial Innovation Guidance Fund Key Project,Hefei University of Technology,China(Grant No.JZ2022YDZJ0087)Wuhu Major Engineering Application Project,China(Grant No.W2022JSKF0499)Collaborative Innovation Program of Hefei Science Center,CAS.
文摘Antimony selenide(Sb_(2)Se_(3))semiconducting material possesses a band gap of 1.05-1.2 eV and has been widely applied in single-junction solar cells.Based on its band gap,Sb_(2)Se_(3)can also be used as the bottom cell absorber material in tandem solar cells.More importantly,Sb_(2)Se_(3)solar cells exhibit excellent stability with nontoxic compositional elements.The band gap of organic-inorganic hybrid perovskite is tunable over a wide range.In this work,we demonstrate for the first time a perovskite/antimony selenide four-terminal tandem solar cell with a specially designed and fabricated transparent electrode for an optimized spectral response.By adjusting the thickness of the transparent electrode layer of the top cell,the wide-band-gap perovskite top solar cell achieves an efficiency of 17.88%,while the optimized antimony selenide bottom cell delivers a power conversion efficiency of 7.85%by introducing a double electron transport layer.Finally,the four-termi-nal tandem solar cell achieves an impressive efficiency exceeding 20%.This work provides a new tandem device structure and demonstrates that antimony selenide is a promising absorber material for bottom cell applications in tandem solar cells.
