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. 2023 Jan 5;284:121780. doi: 10.1016/j.saa.2022.121780. Epub 2022 Aug 26.
In this work, natural dyes from three different species of the same flower family (Chrysanthemum), which containing anthocyanin were extracted and properly prepared to be used as photosensitizers in DSSCs construction. The cells were fabricated with titanium dioxide nanoparticles (TiO) for the photoanodes, whereas platinum electrodes were used for the photocathodes. To understand the behavior of light absorption in addition to the coloring components present in the dyes and the molecular functional groups present in the samples, the UV-Vis absorption spectroscopy and FTIR spectroscopy were used respectively. The performance and efficiency of solar cells were evaluated to establish the photovoltaic criteria for each DSSC built. Through electrochemical characterizations, it was possible to notice that the highest photovoltaic conversion efficiency was obtained with the Chrysanthemum Violet (CV) cell, with efficiency (η) of 1.348%, compared to 1.229% and 0.485% for the Chrysanthemum Green (CG) and Chrysanthemum Blue (CB) cells, respectively. The CV cell also has the highest open circuit voltage (V) at 0.58 V. The results corroborate to present the organic solar cells as a viable option for the electric energy generation.
在这项工作中，从同一家族（菊花）的三种不同花卉中提取了含有花青素的天然染料，并进行了适当的制备，以用作 DSSC 构建中的光敏剂。细胞用二氧化钛纳米粒子（TiO）制成光阳极，而铂电极用作光阴极。为了理解光吸收行为，除了染料中的着色成分和样品中存在的分子官能团外，分别使用了 UV-Vis 吸收光谱和 FTIR 光谱。评估了太阳能电池的性能和效率，以建立每个构建的 DSSC 的光伏标准。通过电化学特性，可以注意到，用菊花紫（CV）电池获得了最高的光伏转换效率，效率（η）为 1.348%，而菊花绿（CG）和菊花蓝（CB）电池的效率分别为 1.229%和 0.485%。CV 电池的开路电压（V）也最高，为 0.58 V。结果证实了有机太阳能电池作为电能产生的可行选择。
