کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
78845 | 49343 | 2011 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A regioregular head to tail thiophene based “double-cable” polymer with pendant anthraquinone functional groups: Preparation, spectroscopy and photovoltaic properties A regioregular head to tail thiophene based “double-cable” polymer with pendant anthraquinone functional groups: Preparation, spectroscopy and photovoltaic properties](/preview/png/78845.png)
We present an investigation into the electronic, photophysical and photovoltaic properties of a π-conjugated “double-cable” polymer based on regioregular head to tail poly(3-functionalized thiophene) with pendant anthraquinone acceptor groups (PT-AQ). This material was compared with model blends composed of a mixture of regioregular head to tail poly(3-hexylthiophene) (P3HT) as the polymer donor and anthraquinone-2-carboxylic acid octyl ester (AQ) as a small-molecule acceptor. We find that PT-AQ shows complete quenching of fluorescence whilst the donor/acceptor blend shows residual fluorescence emission and both phase separation and crystallization of the acceptor component. The operation of the double-cable based devices is however, dominated by geminate recombination and poor charge transport and extraction. Nevertheless, we show that the PT-AQ devices have a higher efficiency than devices based on representative bulk-heterojunction AQ:P3HT blends as the very coarse phase separation and crystallization is suppressed.
Graphical Abstract■ ■ ■ ■ ■Figure optionsDownload as PowerPoint slideResearch highlights
► A conjugated polymer with covalently attached electron acceptors was prepared.
► Total quenching of fluorescence from both components of the polymer was observed.
► Power conversion efficiency of the polymer compromised by poor charge extraction.
► Power conversion efficiency of polymer is higher than that from blends of its constituents.
Journal: Solar Energy Materials and Solar Cells - Volume 95, Issue 7, July 2011, Pages 1723–1730