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Co-sensitization of the HD-2 complex with low-cost cyanoacetanilides for highly efficient DSSCs.
Photochemical & Photobiological Sciences ( IF 2.7 ) Pub Date : 2020-01-27 , DOI: 10.1039/c9pp00381a Mohamed R Elmorsy 1 , Luping Lyu , Rui Su , Ehab Abdel-Latif , Safa A Badawy , Ahmed El-Shafei , Ahmed A Fadda
Photochemical & Photobiological Sciences ( IF 2.7 ) Pub Date : 2020-01-27 , DOI: 10.1039/c9pp00381a Mohamed R Elmorsy 1 , Luping Lyu , Rui Su , Ehab Abdel-Latif , Safa A Badawy , Ahmed El-Shafei , Ahmed A Fadda
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The photophysical and electrochemical properties of new targeted 2-cyanoacetanilide-based dyes are illustrated. New cyanoacetanilides SA7-10 were synthesized and employed as co-sensitizers in DSSCs. The chemical structures of these 2-cyanoacetanilides differ according to the substituent at the benzene ring (-H, -Me, -OMe and -NEt2), with the anchoring moiety being the same, a -COOH group. Furthermore, a density functional theory (DFT) calculation has shown an effective intermolecular charge transfer character, the HOMOs of SA7-10 are mainly located on the corresponding donor part, and their LUMOs are located on carboxylic acid moieties as the acceptor. Interestingly, using photosensitizers SA7-10 as co-sensitizers with HD-2 dye causes an improvement in their photovoltaic performances. Among the dyes, SA10 co-sensitized with HD-2 displayed an overall efficiency of 8.25%, a JSC of 19.5 mA cm-2, a VOC of 0.65 V and an FF of 64.35 compared to 7.46%, 19 mA cm-2, 0.64 V and 60.54, respectively, of HD-2 only. Moreover, the electrochemical impedance spectroscopy (EIS) data of SA7-10 and HD-2 were found to be in accordance with the obtained photovoltaic parameters. Finally, the results indicated that 2-cyanoacetanilide-based dyes were utilized as promising co-sensitizers due to their easy preparation methods and their relatively small size.
中文翻译：
HD-2复合物与低成本氰基乙酰胺共增敏用于高效DSSC。
说明了新的靶向2-氰基乙酰苯胺基染料的光物理和电化学性质。合成了新的氰基乙酰苯胺SA7-10，并将其用作DSSC中的增敏剂。这些2-氰基乙酰苯胺的化学结构根据苯环上的取代基（-H，-Me，-OMe和-NEt2）而有所不同，其锚定部分相同，即-COOH基团。此外，密度泛函理论（DFT）计算显示出有效的分子间电荷转移特性，SA7-10的HOMO主要位于相应的供体部分，其LUMO位于作为受体的羧酸部分。有趣的是，使用光敏剂SA7-10作为与HD-2染料的共敏剂会改善其光电性能。在染料中 与HD-2共敏化的SA10的总效率为8.25％，JSC为19.5 mA cm-2，VOC为0.65 V，FF为64.35，而7.46％，19 mA cm-2、0.64 V和60.54分别仅适用于HD-2。此外，发现SA7-10和HD-2的电化学阻抗谱（EIS）数据与获得的光伏参数一致。最后，结果表明基于2-氰基乙酰苯胺的染料由于其易于制备的方法和相对较小的尺寸而被用作有前途的助敏剂。
更新日期：2020-02-19
中文翻译：
HD-2复合物与低成本氰基乙酰胺共增敏用于高效DSSC。
说明了新的靶向2-氰基乙酰苯胺基染料的光物理和电化学性质。合成了新的氰基乙酰苯胺SA7-10，并将其用作DSSC中的增敏剂。这些2-氰基乙酰苯胺的化学结构根据苯环上的取代基（-H，-Me，-OMe和-NEt2）而有所不同，其锚定部分相同，即-COOH基团。此外，密度泛函理论（DFT）计算显示出有效的分子间电荷转移特性，SA7-10的HOMO主要位于相应的供体部分，其LUMO位于作为受体的羧酸部分。有趣的是，使用光敏剂SA7-10作为与HD-2染料的共敏剂会改善其光电性能。在染料中 与HD-2共敏化的SA10的总效率为8.25％，JSC为19.5 mA cm-2，VOC为0.65 V，FF为64.35，而7.46％，19 mA cm-2、0.64 V和60.54分别仅适用于HD-2。此外，发现SA7-10和HD-2的电化学阻抗谱（EIS）数据与获得的光伏参数一致。最后，结果表明基于2-氰基乙酰苯胺的染料由于其易于制备的方法和相对较小的尺寸而被用作有前途的助敏剂。
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