等离子体效应对染料分子敏化二氧化钛的影响

Q3 Engineering
Auzhanova A.A, Ibrayev N.Kh, E. Seliverstova
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引用次数: 0

摘要

研究了金属纳米粒子的等离子效应对曙红和罗丹明 B 染料向二氧化钛的电子转移的影响。光谱动力学测量结果表明,与二氧化硅相比,两种染料在二氧化钛表面的荧光强度和荧光寿命都有所下降,这表明电荷从染料转移到了半导体。在核@壳(Ag@TiO2)等离子体纳米结构的存在下,两种染料的荧光都会增强,同时染料发射的持续时间也会缩短。记录到最大等离子效应的最佳浓度为 3 wt% 的 Ag@TiO2。等离子效应还能提高所研究的染料分子对半导体的敏化效率,这表现为半导体薄膜的光电和电荷传输特性的提高。关于染料/半导体系统中电荷转移过程的质子效应的研究结果可用于光伏、光催化和光电元件设备的开发。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
INFLUENCE OF PLASMON EFFECT ON THE SENSITIZATION OF TITANIUM DIOXIDE BY DYE MOLECULES
The influence of the plasmon effect of metal nanoparticles on electron transfer from Eosin and Rhodamine B dyes to TiO2was studied. Spectral-kineticmeasurementsshowedthat, compared to SiO2, not only the intensity but also the fluorescence lifetime of both dyes decreases on the TiO2surface, which indicates the charge transfer from the dye to the semiconductor. In the presence of core@shell (Ag@TiO2) plasmon nanostructures, an intensification of the fluorescence of both dyes is observed, as well as a decrease in the duration of the dyes emission. The optimal concentration for which the maximum plasmon effect was recorded is 3 wt% of Ag@TiO2. The plasmon effect also leads to an increase in the efficiency of sensitization of the semiconductor by molecules of the dyes under study, which is expressed as an increase in the photovoltaic and charge-transport characteristics of the semiconductor films. The results obtained on theplasmoneffect on the charge transfer process in the dye/semiconductor system can be used in the development of devices for photovoltaics, photocatalytic, and optoelectronic elements.
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CiteScore
1.10
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15
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