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Optical and Photovoltaic Properties of Thieno[3,2-b]thiophene-Based Push-Pull Organic Dyes with Different Anchoring Groups for Dye-Sensitized Solar Cells.
ACS Omega ( IF 3.7 ) Pub Date : 2017-12-29 , DOI: 10.1021/acsomega.7b01195 Sara S M Fernandes 1 , M Cidália R Castro 1 , Ana Isabel Pereira 2 , Adélio Mendes 2 , Carlos Serpa 3 , João Pina 3 , Licínia L G Justino 3 , Hugh D Burrows 3 , M Manuela M Raposo 1
ACS Omega ( IF 3.7 ) Pub Date : 2017-12-29 , DOI: 10.1021/acsomega.7b01195 Sara S M Fernandes 1 , M Cidália R Castro 1 , Ana Isabel Pereira 2 , Adélio Mendes 2 , Carlos Serpa 3 , João Pina 3 , Licínia L G Justino 3 , Hugh D Burrows 3 , M Manuela M Raposo 1
Affiliation
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The effect of anchoring groups on the optical and electrochemical properties of triphenylamine-thienothiophenes, and on the photovoltaic performance of DSSCs photosensitized with the prepared dyes, was studied using newly synthesized compounds with cyanoacetic acid or rhodanine-3-acetic acid groups. Precursor aldehydes were synthesized through Suzuki cross-coupling, whereas Knoevenagel condensation of these with 2-cyanoacetic acid or rhodanine-3-acetic acid afforded the final push-pull dyes. A comprehensive photophysical study was performed in solution and in the solid state. The femtosecond time-resolved transient absorption spectra for the synthesized dyes were obtained following photoexcitation in solution and for the dyes adsorbed to TiO2 mesoporous films. Information on conformation, electronic structure, and electron distribution was obtained by density functional theory (DFT) and time-dependent DFT calculations. Triphenylamine-thienothiophene functionalized with a cyanoacetic acid anchoring group displayed the highest conversion efficiency (3.68%) as the dye sensitizer in nanocrystalline TiO2 solar cells. Coadsorption studies were performed for this dye with the ruthenium-based N719 dye, and they showed dye power conversion efficiencies enhanced by 20-64%. The best cell performance obtained with the coadsorbed N719 and cyanoacetic dye showed an efficiency of 6.05%.
中文翻译：
染料敏化太阳能电池中基于噻吩并[3,2-b]噻吩的具有不同锚固基团的推挽式有机染料的光学和光伏特性。
使用新合成的具有氰基乙酸或若丹宁-3-乙酸基团的化合物，研究了锚定基团对三苯胺-噻吩并噻吩的光学和电化学性质以及用制备的染料光敏的DSSC的光电性能的影响。前体醛是通过Suzuki交叉偶联合成的，而这些醛与2-氰基乙酸或Rhodanine-3-乙酸的Knoevenagel缩合提供了最终的推挽式染料。在溶液和固态下进行了全面的光物理研究。在溶液中进行光激发后，获得了合成染料的飞秒时间分辨瞬态吸收光谱，并且在TiO2介孔膜上吸附的染料也获得了飞秒时间分辨的瞬态吸收光谱。有关构造，电子结构，电子分布是通过密度泛函理论（DFT）和随时间变化的DFT计算获得的。作为氰基乙酸锚定基团官能化的三苯胺-噻吩并噻吩作为染料敏化剂在纳米晶TiO2太阳能电池中显示出最高的转化效率（3.68％）。对该染料与钌基N719染料进行了共吸附研究，结果表明染料功率转换效率提高了20-64％。用共吸附的N719和氰基乙酸染料获得的最佳电池性能显示出6.05％的效率。对该染料与钌基N719染料进行了共吸附研究，结果表明染料功率转换效率提高了20-64％。用共吸附的N719和氰基乙酸染料获得的最佳电池性能显示出6.05％的效率。对该染料与钌基N719染料进行了共吸附研究，结果表明染料功率转换效率提高了20-64％。用共吸附的N719和氰基乙酸染料获得的最佳电池性能显示出6.05％的效率。
更新日期：2017-12-29
中文翻译：
染料敏化太阳能电池中基于噻吩并[3,2-b]噻吩的具有不同锚固基团的推挽式有机染料的光学和光伏特性。
使用新合成的具有氰基乙酸或若丹宁-3-乙酸基团的化合物，研究了锚定基团对三苯胺-噻吩并噻吩的光学和电化学性质以及用制备的染料光敏的DSSC的光电性能的影响。前体醛是通过Suzuki交叉偶联合成的，而这些醛与2-氰基乙酸或Rhodanine-3-乙酸的Knoevenagel缩合提供了最终的推挽式染料。在溶液和固态下进行了全面的光物理研究。在溶液中进行光激发后，获得了合成染料的飞秒时间分辨瞬态吸收光谱，并且在TiO2介孔膜上吸附的染料也获得了飞秒时间分辨的瞬态吸收光谱。有关构造，电子结构，电子分布是通过密度泛函理论（DFT）和随时间变化的DFT计算获得的。作为氰基乙酸锚定基团官能化的三苯胺-噻吩并噻吩作为染料敏化剂在纳米晶TiO2太阳能电池中显示出最高的转化效率（3.68％）。对该染料与钌基N719染料进行了共吸附研究，结果表明染料功率转换效率提高了20-64％。用共吸附的N719和氰基乙酸染料获得的最佳电池性能显示出6.05％的效率。对该染料与钌基N719染料进行了共吸附研究，结果表明染料功率转换效率提高了20-64％。用共吸附的N719和氰基乙酸染料获得的最佳电池性能显示出6.05％的效率。对该染料与钌基N719染料进行了共吸附研究，结果表明染料功率转换效率提高了20-64％。用共吸附的N719和氰基乙酸染料获得的最佳电池性能显示出6.05％的效率。
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