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Enhanced performance of CsPbBr3 perovskite solar cells by reducing the conduction band offsets via a Sr-modified TiO2 layer
Cao,Xiaobing1; Zhang,Guoshuai1; Cai,Yifan1; Jiang,Long1; Chen,Yan1; He,Xin1; Zeng,Qingguang1; Jia,Yi2; Xing,Guichuan3; Wei,Jinquan4
2020-11-01
Source PublicationApplied Surface Science
ISSN0169-4332
Volume529
AbstractCsPbBr based perovskite solar cells have attracted an increasing attention owing to their high stability in ambient. The conduction band offset (CBO) between electron transportation layer and light absorb layer has important effects on the photovoltaic performance of perovskite solar cells. For the typical device configuration of FTO/TiO/CsPbBr/Carbon, the CBO value reaches to ~0.94 eV, which is too high to get efficient electron extraction. It is important to optimize the CBO so as to enhance the photovoltaic performance of the solar cells. In this work, we reduce the CBO value from 0.94 eV to 0.81 eV in the typical device configuration of FTO/TiO/CsPbBr/Carbon by using Sr to modify the TiO layer. The Sr-modified TiO layer facilitates efficient extraction of electrons from CsPbBr to electron transportation layer. Meanwhile, the Sr-modified TiO layer suppresses the charge recombination rate in the perovskite solar cells. As a result, the power conversion efficiency of solar cells is enhanced from 5.92% to 7.22% by simply introducing a Sr-modified TiO layer.
KeywordConduction band offset Electron transportation layer Photovoltaic performance Solar cells Strontium ions
DOI10.1016/j.apsusc.2020.147119
URLView the original
Language英语
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Cited Times [WOS]:4   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorJia,Yi
Affiliation1.School of Applied Physics and Materials,Wuyi University,Jiangmen,529020,China
2.Qian Xuesen Laboratory of Space Technology,China Academy of Space Technology,Beijing,100094,China
3.Institute of Applied Physics and Materials Engineering,University of Macau,Avenida da Universidade,Macau,Taipa,999078,China
4.State Key Lab of New Ceramic and Fine Processing,Tsinghua University,Beijing,100084,China
Recommended Citation
GB/T 7714
Cao,Xiaobing,Zhang,Guoshuai,Cai,Yifan,et al. Enhanced performance of CsPbBr3 perovskite solar cells by reducing the conduction band offsets via a Sr-modified TiO2 layer[J]. Applied Surface Science,2020,529.
APA Cao,Xiaobing,Zhang,Guoshuai,Cai,Yifan,Jiang,Long,Chen,Yan,He,Xin,Zeng,Qingguang,Jia,Yi,Xing,Guichuan,&Wei,Jinquan.(2020).Enhanced performance of CsPbBr3 perovskite solar cells by reducing the conduction band offsets via a Sr-modified TiO2 layer.Applied Surface Science,529.
MLA Cao,Xiaobing,et al."Enhanced performance of CsPbBr3 perovskite solar cells by reducing the conduction band offsets via a Sr-modified TiO2 layer".Applied Surface Science 529(2020).
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