Two-Dimensional Polyfluorenes Bearing Thienylenevinylene 蟺-Bridge-Acceptor Side Chains for Photovoltaic Solar Cells
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- 作者：Enwei Zhu ; Jiefeng Hai ; Zixuan Wang ; Bin Ni ; Yaohua Jiang ; Linyi Bian ; Fujun Zhang ; Weihua Tang
- 刊名：Journal of Physical Chemistry C
- 出版年：2013
- 出版时间：November 27, 2013
- 年：2013
- 卷：117
- 期：47
- 页码：24700-24709
- 全文大小：524K
- 年卷期：v.117,no.47(November 27, 2013)
- ISSN：1932-7455
文摘
Two-dimensional polyfluorenes bearing thienylenevinylene-bridged malononitrile (PF-BTDCN) or diethylthiobarbituric acid accepting side chains (PF-BTDTA) have been successfully prepared. The polymers were fully characterized for their physicochemical, electrochemical, and photovoltaic properties. These polymers exhibited greatly changed properties with the introduction of 蟺-conjugated accepting side chains. The enhancement of current density for the bulk-heterojunction solar cells was observed when replacing the PEDOT:PSS interfacial layer with molybdenum oxide (MoO3). Photovoltaic solar cells with the configuration ITO/MoO3/polymer:PCBM/Al exhibited an efficiency of 3.13% and 1.72% for PF-BTDCN and PF-BTDTA, respectively. A morphology study revealed the existence of nanoscale phase separation with interpenetration networks between polymer and PCBM domains.