A hyperbranched conjugated polymer as the cathode interlayer for high-performance polymer solar cells

Menglan Lv, Shusheng Li, Jacek Jaroslaw Jasieniak, Jianhui Hou, Jin Zhu, Zhan'ao Tan, Scott Edward Watkins, Yongfang Li, Xiwen Chen

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An alcohol-soluble hyperbranched conjugated polymer HBPFN with a dimethylamino moiety is synthesized and used as a cathode interlayer. A PCE of 7.7 is obtained for PBDTTT-C-T/PC71BM based solar cells. No obvious interfacial dipole is found at the interface between the active layer and HBPFN however, an interfacial dipole with the cathode could be one of the reasons for the enhanced performance.
Original languageEnglish
Pages (from-to)6889 - 6894
Number of pages6
JournalAdvanced Materials
Issue number47
Publication statusPublished - 2013
Externally publishedYes

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