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Enhanced photoresponse from the ordered microstructure of naphthalocyanine-carbon nanotube composite film

机译：萘菁-碳纳米管复合膜有序微观结构增强的光响应

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Naphthalocyanine-sensitized multi-walled carbon nanotube (NaPc-MWNT) composites have been synthesized through the pi-stacking between naphthalocyanine (NaPc) and carbon nanotubes. The resultant nanocomposites were characterized with a scanning electron microscope (SEM), a transmission electron microscope (TEM), and by UV - vis absorption and photocurrent spectra. The long-range ordering was observed in the NaPc - MWNT composites by using a TEM. The enhancement in the absorption intensity and the broadening of the absorption wavelength observed in the composite films, which were due to the attachment of NaPc on the MWNT surface, is discussed based on the measured UV - vis absorption spectra. Furthermore, the photoconductivity of the poly( 3-hexylthiophene)(PAT6) - NaPc - MWNT composite film was found to increase remarkably in the visible region and broaden towards the red regions. These new phenomena were ascribed to the larger donor/acceptor (D/A) interface and the formation of a biconsecutive D/A network structure, as discussed in consideration of the photoinduced charge transfer between PAT6 and NaPc - MWNT.
机译：萘酞菁敏化的多壁碳纳米管（NaPc-MWNT）复合材料是通过萘酞菁（NaPc）和碳纳米管之间的pi堆叠合成的。所得的纳米复合材料用扫描电子显微镜（SEM），透射电子显微镜（TEM）以及紫外可见吸收和光电流谱进行表征。使用TEM在NaPc-MWNT复合材料中观察到了长程有序。基于测得的UV-vis吸收光谱，讨论了由于NaPc附着在MWNT表面上而引起的复合膜吸收强度的增强和吸收波长的变宽。此外，发现聚（3-己基噻吩）（PAT6）-NaPc-MWNT复合膜的光电导性在可见光区域显着增加，并向红色区域扩展。这些新现象归因于较大的供体/受体（D / A）界面以及双连续D / A网络结构的形成，这是考虑到PAT6和NaPc-MWNT之间的光诱导电荷转移所讨论的。

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