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Fluorinated fused nonacyclic interfacial materials for efficient and stable perovskite solar cells

Abstract

Three fused-ring n-type semiconductors based on 6,6,12,12-tetrakis(4-hexylphenyl)-indacenobis(dithieno[3,2-b;2,3-d]thiophene) end-capped with 1,1-dicyanomethylene-3-indanone substituted by different numbers of fluorine atoms (INIC series) are employed as interfacial materials to modify the surface of perovskite film in inverted planar perovskite solar cells (PSCs). Due to fast interfacial charge extraction and efficient trap passivation, PSCs based on INIC series exhibit a maximum power conversion efficiency of 19.3% without any hysteresis, which is superior to the control devices without INIC series (16.6%). Moreover, strong water-resistance ability of fluorinated INIC significantly enhance the ambient stability of the PSCs. The effects of fluorine atom number on the device performance are discussed.

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Publication details

The article was received on 06 Aug 2017, accepted on 16 Sep 2017 and first published on 16 Sep 2017


Article type: Paper
DOI: 10.1039/C7TA06923E
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Fluorinated fused nonacyclic interfacial materials for efficient and stable perovskite solar cells

    K. Liu, S. Dai, F. Meng, J. Shi, Y. Li, J. Wu, Q. Meng and X. Zhan, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA06923E

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