Laboratory of Experimental and Applied Physics, Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Av. Maracanã 229, Rio de Janeiro 20271-110, Brazil.
Laboratory of Experimental and Applied Physics, Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Av. Maracanã 229, Rio de Janeiro 20271-110, Brazil.
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Jun 5;233:118198. doi: 10.1016/j.saa.2020.118198. Epub 2020 Feb 26.
In this work, the natural flower extracted dyes containing luteolin were prepared using three different specimens from daisy flowers family (Leucanthemum vulgare), namely yellow daisy, purple daisy and wine daisy, according to the color of its petals. Moreover, DSSCs were fabricated using nanosized titanium dioxide (TiO) as an anode; for the photocathodes, two different specimens were used: i) graphite electrode and ii) platinum electrode. To recognize the light absorption behavior, the existence of anchoring groups and coloring components of the extracted dyes were determined using absorption spectroscopy. The surface roughness of the photoanodes and cathodes were examined using atomic force microscope (AFM). The photovoltaic performance and efficiency of assembled DSSCs were evaluated to realize the influence of TiO photoanodes on interaction of the Leucanthemum vulgare extracted dye molecules with graphite or platinum photocathodes. DSSCs fabricated with platinum cathode show higher conversion efficiency (η) of 0.6%, 0.4% and 0.8% for the yellow daisy, wine daisy and purple daisy, respectively. DSSCs sensitized with daisy wine dye showed highest open-circuit voltage (V) of 520 mV and efficiency of 0.79% and 0.88%, for the graphite and platinum cathodes, respectively. These results showed that the DSSCs, using daisy flowers extracts as efficient photosensitizers, are suitable for the fabrication of environmentally safe, inexpensive, clean and renewable energy.
在这项工作中，根据花瓣的颜色，使用来自雏菊科（Leucanthemum vulgare）的三种不同标本（黄色雏菊、紫色雏菊和酒色雏菊），制备了含有木犀草素的天然花提取染料。此外，使用纳米二氧化钛（TiO）作为阳极制造 DSSC；对于光阴极，使用了两种不同的标本：i）石墨电极和 ii）铂电极。为了识别光吸收行为，使用吸收光谱确定了提取染料的锚固基团和着色成分的存在。使用原子力显微镜（AFM）检查光电阳极和光阴极的表面粗糙度。评估组装的 DSSC 的光伏性能和效率，以了解 TiO 光阳极对 Leucanthemum vulgare 提取染料分子与石墨或铂光阴极相互作用的影响。使用铂阴极制造的 DSSC 显示出更高的转换效率（η），对于黄色雏菊、酒色雏菊和紫色雏菊，分别为 0.6%、0.4%和 0.8%。用雏菊酒染料敏化的 DSSC 显示出最高的开路电压（V）为 520 mV，对于石墨和铂阴极，效率分别为 0.79%和 0.88%。这些结果表明，使用雏菊花提取物作为高效光敏剂的 DSSC 适合制造环境安全、廉价、清洁和可再生能源。
