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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Probing the nanoscale phase separation in binary photovoltaic blendsof poly(3-hexylthiophene) and methanofullerene by energy transfer
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Probing the nanoscale phase separation in binary photovoltaic blendsof poly(3-hexylthiophene) and methanofullerene by energy transfer

机译:通过能量转移探究聚(3-己基噻吩)和亚甲基富勒烯的二元光伏混合物中的纳米级相分离

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摘要

The generation of charge carriers in organic photovoltaic devices requires exciton diffusion to aninterface of electron donor and acceptor materials, where charge separation occurs. We report a timeresolved study of fluorescence quenching in films of poly(3-hexylthiophene) containing a range offractions of the electron acceptor [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). We show thatenergy transfer from P3HT to PCBM helps to bring excitons to the interface, where they dissociate intocharge carriers. Fluorescence quenching in blends with <50 wt% of PCBM is controlled by excitondiffusion in P3HT. This allows us to estimate the average size of PCBM domains to be about 9 nm inthe 1:1 blend. The implications for polymer solar cells are discussed.
机译:有机光伏器件中电荷载流子的产生需要激子扩散到发生电荷分离的电子供体和受体材料的界面。我们报告了一个时间分辨的荧光猝灭在聚(3-己基噻吩)薄膜中的研究,该薄膜包含一系列电子受体[6,6]-苯基-C61-丁酸甲酯(PCBM)。我们表明,从P3HT到PCBM的能量转移有助于将激子带到界面,在那里激子解离成电荷载流子。与PCBM含量小于50 wt%的共混物中的荧光猝灭由P3HT中的激射扩散控制。这使我们可以估计在1:1混合物中PCBM域的平均大小约为9 nm。讨论了聚合物太阳能电池的含义。

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