Magnetic field effects on photoelectrochemical reactions of electrodes modified with thin films consisting of conductive polymers
Magnetic field effects on photoelectrochemical reactions of electrodes modified with thin films consisting of conductive polymers
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DOI：
10.7567/jjap.53.01ad06
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发表时间：
2013
影响因子：
1.5
通讯作者：
H. Yonemura;Masayuki Takata;S. Yamada
中科院分区：
文献类型：
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作者：
H. Yonemura;Masayuki Takata;S. Yamada
研究了磁场对纳米线修饰电极光电化学反应的影响，纳米线修饰电极由区域规整的聚3-己基噻吩（P3 HT）、退火前后的无序P3 HT膜和聚[2-甲氧基-5-（2-乙基己氧基）-1，4-亚苯基亚乙烯基]（MEH-PPV）膜组成。在P3 HT中，在磁场的存在下，光电流增加。MFE的大小按以下顺序增加：P3 HT纳米线，退火处理的P3 HT膜，未经退火处理的P3 HT膜的修饰电极。MFE的差异最有可能归因于相邻噻吩之间的空穴跳跃能力。另一方面，在MEH-PPV中，在磁场的存在下，光电流降低。用极化子对机制解释了P3 HT和MEH-PPV修饰电极的光电化学反应的MFE。P3 HT和MEH-PPV之间MFE的差异归因于极化子对的自旋多重性。
The magnetic field effects (MFEs) on the photoelectrochemical reactions of electrodes modified with nanowires consisting of regioregular poly(3-hexylthiophene) (P3HT), disordered P3HT films without and with annealing treatment, and poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) films were examined. In P3HT, the photocurrent increased in the presence of a magnetic field. The magnitude of the MFEs increased in the following order of modified electrodes: P3HT nanowires, P3HT films with annealing treatment, P3HT films without annealing treatment. The difference in the MFEs is most likely to be attributable to the capability of hole hopping between adjacent thiophenes. On the other hand, in MEH-PPV, the photocurrent decreased in the presence of a magnetic field. The MFEs on the photoelectrochemical reactions of electrodes modified with P3HT and MEH-PPV are explained by the polaron pair mechanism. The difference in the MFEs between P3HT and MEH-PPV is ascribed to the spin multiplicity of the polaron pairs.