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End‐Capping Effect of a Narrow Bandgap Conjugated Polymer on Bulk Heterojunction Solar Cells
Author(s) -
Park Jin Kuen,
Jo Jang,
Seo Jung Hwa,
Moon Ji Sun,
Park Yeong Don,
Lee Kwanghee,
Heeger Alan J.,
Bazan Guillermo C.
Publication year - 2011
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.201004629
Subject(s) - materials science , polymer solar cell , thiophene , conjugated system , polymer , band gap , nanotechnology , optoelectronics , organic chemistry , chemistry , composite material
Device performances of BHJ solar cells based on poly[(4,4‐didodecyldithieno[3,2‐b:2’,3’‐d]silole)‐2,6‐diyl‐ alt ‐(2,1,3‐benzoxadiazole)‐4,7‐diyl]and PC 71 BM improve by capping the chain ends with thiophene fragments. This structural modification yields materials that are more thermally robust and that can be used in devices with thicker films – important considerations for enabling the mass production of plastic solar cells.