1. PCBM/Ag interface dipole management in inverted perovskite solar cells.
- Author
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Qu, Dandan, Guo, Tonghui, Zhang, Jing, Deng, Zhiqiang, Zhang, Zequn, Zhao, Rui, Liu, Xiaohui, Hu, Ziyang, Huang, Like, and Zhu, Yuejin
- Subjects
SOLAR cells ,PHOTOVOLTAIC power systems ,ELECTRON transport ,METHYL formate ,PEROVSKITE ,SILANE - Abstract
In inverted perovskite solar cells, the [6,6]-phenyl-C61-butyric acid methyl ester (PCBM)/Ag back interface is quite important because serious recombination occurs and H
2 O/O2 directly attacks this interface to induce device instability. Here, bi-functional dipole layers are applied at the interface aiming at improving the charge transport and device stability simultaneously. Silane with -CF3 end group anchored on the PCBM surface induces more effective dipole effect than that with (CH2 )7 -CH3 end functional silane, bending the interface energy level to promote electron transport and reduce recombination. The hydrophobic nature of -CF3 also enhances the durability of the device. This work highlights the back surface dipole management method to achieve efficient and stable perovskite solar cells. [ABSTRACT FROM AUTHOR]- Published
- 2021
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