Department of Physics, National Institute of Technology, Warangal, 506004, India.
Centre for Solar Energy Materials, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Balapur, Hyderabad, 500005, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Mar 5;228:117686. doi: 10.1016/j.saa.2019.117686. Epub 2019 Oct 23.
In this study, we have explored prickly pear fruit extract as a photosensitizer in dye-sensitized solar cells (DSSC). The photosensitizer was isolated from prickly pear fruits by extraction method using ethanol as solvent. Structural, morphological and optical properties of prickly pear extract characterized by XRD, SEM, UV-VIS-DRS, FTIR spectra, respectively. UV-VIS absorption and FTIR spectra of prickly pear fruit extract confirm the presence of betacyanin and hydroxyl groups anchoring onto the TiO surface. The absorption maxima at 534 nm in the visible region is prominent. The presence of betacyanin in the extract is indicative that the dye will be useful as a sensitizer in DSSC. Reflectance edge of TiO is red-shifted upon the adsorption of natural dye. The XPS analysis showed the charge state of hydroxyl (O-H) groups that are attached with the natural dye adsorbed onto the surface of TiO. The fabricated DSSC had a conversion efficiency (ɳ) of 0.56% with highest fill factor (FF) of 0.85, open-circuit voltage (V) of 0.56 V and short circuit-current density (J) with 1.17 mA/cm. The value obtained for the fill factor is promising to further explore the prickly pear extract for applicability in DSSC by improving the efficiency.
在这项研究中，我们探索了仙人掌果实提取物作为染料敏化太阳能电池 (DSSC) 的光敏剂。通过使用乙醇作为溶剂的提取方法从仙人掌果实中分离出光敏剂。使用 XRD、SEM、UV-VIS-DRS、FTIR 光谱分别对仙人掌提取物的结构、形貌和光学性质进行了表征。仙人掌果实提取物的紫外可见吸收和 FTIR 光谱证实了甜菜红素和羟基存在于 TiO 表面上的锚定。在可见光区域的 534nm 处的吸收最大值很明显。提取物中甜菜红素的存在表明该染料将可用于 DSSC 中的敏化剂。在吸附天然染料后，TiO 的反射边缘发生红移。XPS 分析显示了与吸附在 TiO 表面的天然染料相连的羟基 (O-H) 基团的电荷状态。所制备的 DSSC 的转换效率 (ɳ) 为 0.56%，最高填充因子 (FF) 为 0.85，开路电压 (V) 为 0.56V，短路电流密度 (J) 为 1.17mA/cm。填充因子的值很有希望通过提高效率进一步探索仙人掌提取物在 DSSC 中的适用性。
