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Effect of Natural Sensitizers Anchoring to Nanoporous TiO2 on Performance of Dye-Sensitized Solar Cells
Journal of Electronic Materials ( IF 2.1 ) Pub Date : 2021-06-03 , DOI: 10.1007/s11664-021-09010-7
M. Ben Karoui , S. Saadaoui , A. Torchani , R. Gharbi

Dyes extracted from leaves and flowers of plants were used as sensitizers in dye-sensitized solar cells (DSSCs). The TiO2 photoanodes were deposited on cleaned fluorine-doped tin oxide transparent conducting glass substrates by a doctor blade coating technique. The obtained photoanodes were immersed in the prepared dyes and analyzed through their absorption and fluorescence spectra. The structural and morphological properties of developed photoanodes were studied. The natural pigments lawsone and scopoletin exhibit unique qualities due to their solar light absorption and excellent chemical structure, which enable them to effectively and firmly bind with the TiO2 surface due to their carboxyl groups. The assembled DSSCs were tested and analyzed to determine their photoelectrical performance. The solar-to-current energy conversion efficiency of a DSSC using mallow as a sensitizer was higher than those using other natural dyes, with a short-circuit current density of 0.69 mA/cm2 and more stable performance under illumination. The laser beam-induced current measurements showed unfilled zones with electrolytic solution and induced degradation of the DSSC performance.



中文翻译:

锚定在纳米多孔 TiO2 上的天然敏化剂对染料敏化太阳能电池性能的影响

从植物的叶子和花朵中提取的染料被用作染料敏化太阳能电池 (DSSC) 的敏化剂。通过刮刀涂布技术将TiO 2 光阳极沉积在清洁的掺氟氧化锡透明导电玻璃基板上。将获得的光阳极浸入制备的染料中,并通过它们的吸收和荧光光谱进行分析。研究了显影光阳极的结构和形态特性。天然色素 Lawone 和东莨菪碱具有独特的性质,因为它们对太阳光的吸收和优异的化学结构使它们能够有效而牢固地与 TiO 2结合表面由于其羧基。对组装的 DSSC 进行测试和分析,以确定它们的光电性能。以锦葵为敏化剂的DSSC的太阳能-电流能量转换效率高于使用其他天然染料的DSSC,短路电流密度为0.69 mA/cm 2,光照下性能更稳定。激光束感应电流测量显示电解液未填充区域和诱导 DSSC 性能退化。

更新日期:2021-06-28
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