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A Hyperbranched Conjugated Polymer as the Cathode Interlayer for High‐Performance Polymer Solar Cells
Author(s) -
Lv Menglan,
Li Shusheng,
Jasieniak Jacek J.,
Hou Jianhui,
Zhu Jin,
Tan Zhan'ao,
Watkins Scott E.,
Li Yongfang,
Chen Xiwen
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201302726
Subject(s) - materials science , cathode , organic solar cell , conjugated system , polymer , energy conversion efficiency , polymer solar cell , polyethylenimine , chemical engineering , active layer , nanotechnology , layer (electronics) , optoelectronics , composite material , chemistry , transfection , thin film transistor , biology , genetics , cell culture , engineering
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/PC 71 BM 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.