Institute of Chemistry, Faculty of Mathematics, Physics and Chemistry, University of Silesia, Szkolna 9, 40-007 Katowice, Poland.
Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34 M. Curie-Sklodowska Str., 41-819 Zabrze, Poland.
J Photochem Photobiol B. 2019 Aug;197:111555. doi: 10.1016/j.jphotobiol.2019.111555. Epub 2019 Jul 12.
A series of heterocyclic donor-acceptor systems were synthesized and well characterized by using H, C NMR, FT-IR, and elemental analysis. They were designed to investigate the effect of thiophene and cyanoacrylic acid number units on the thermal, optical, electrochemical and finally photovoltaic properties of dye-sensitized solar cells prepared with the selected compounds. The effect of chemical structure on their properties was demonstrated. They showed the beginning of thermal decomposition between 230 and 270 °C. The compounds absorbed the radiation in the range of 300-500 nm or 200-400 nm. They were electrochemically active and varied in energy band gap from 3.40 to 1.58 eV. Additionally, their optimized geometry, HOMO-LUMO levels, ionization potential, and electron affinity were evaluated using density functional theory. The photovoltaic devices based on TiO sensitized with the obtained molecules exhibited low power conversion efficiency, which was the highest for the device containing the symmetrical molecule with bithiophene structure. Under co-sensitization, the cell made of the same compound gave significant enhancement of efficiency of 6.3% being higher to that of the individual device prepared from dye N719 (5.75%). Moreover, the effects of immersion time of TiO electrode in the dye solution and co-sensitization methods were tested. The surface morphology of photoanode was investigated using atomic force microscopy.
一系列杂环给体-受体体系被合成并通过使用 H、C NMR、FT-IR 和元素分析进行了很好的表征。它们旨在研究噻吩和氰基丙烯酸单元数对用所选化合物制备的染料敏化太阳能电池的热、光、电化学和最终光伏性能的影响。证明了化学结构对其性能的影响。它们在 230-270°C 之间开始热分解。这些化合物在 300-500nm 或 200-400nm 的范围内吸收辐射。它们具有电化学活性，能带隙从 3.40 到 1.58eV 不等。此外，还使用密度泛函理论评估了它们的优化几何形状、HOMO-LUMO 能级、电离势和电子亲和力。基于 TiO 敏化的基于获得的分子的光伏器件表现出低功率转换效率，对于含有具有联噻吩结构的对称分子的器件，其效率最高。在共敏化下，由相同化合物制成的电池的效率显著提高，达到了用染料 N719（5.75%）制备的单个器件的效率。此外，还测试了 TiO 电极在染料溶液中的浸渍时间和共敏化方法的影响。使用原子力显微镜研究了光电阳极的表面形态。
