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Improving the Ordering and Photovoltaic Properties by Extending π –Conjugated Area of Electron‐Donating Units in Polymers with D‐A Structure
Author(s) -
Huang Ye,
Guo Xia,
Liu Feng,
Huo Lijun,
Chen Yuning,
Russell Thomas P.,
Han Charles C.,
Li Yongfang,
Hou Jianhui
Publication year - 2012
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.201200995
Subject(s) - materials science , photovoltaics , photovoltaic system , conjugated system , polymer , organic solar cell , energy conversion efficiency , order (exchange) , nanotechnology , engineering physics , polymer science , optoelectronics , electrical engineering , physics , composite material , business , engineering , finance
A systematic molecular design process from PBDTTT‐S to PBDTDTTT‐S‐T , a high‐performance semiconducting polymer for organic photovoltaics, has been achieved by enhancing structural order, self‐assembly and carrier mobility. Solar cells made from PBDTDTTT‐S‐T blended with PC 70 BM show a power conversion efficiency (PCE) of 7.81%, which is 25% higher than that of the parent PBDTTT‐S .