Chen Yung-Chung, Kuo Yuan-Tsung, Liang Chia-Jung
Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology 415, Jiangong Rd., Sanmin District Kaohsiung City 80778 Taiwan Republic of China
Institute of Chemistry, Academia Sinica No. 128, Sec. 2, Academia Road, Nankang District Taipei 11529 Taiwan.
RSC Adv. 2018 Mar 9;8(18):9783-9789. doi: 10.1039/c7ra13751f. eCollection 2018 Mar 5.
A series of phenothiazine based dyes (OMS1-3), comprising different conjugation lengths and numbers of electron deficient (cyanovinyl) moieties with cyanoacrylic acid as an anchor, have been synthesized. The dyes display broad UV-visible absorption, from 389 nm to 484 nm. The higher molar extinction coefficient and longer absorption peak are achieved as the conjugation length and numbers of electron deficient units increase. The cell performance based on these dyes exhibits efficiencies ranging from 0.68-4.00%, compared to a standard N719-based device (PCE = 7.49%) fabricated under similar conditions. Although the OMS3 dye has two electron deficient units between phenothiazine units, an insignificant electron trapping effect is observed. From the results, the OMS3 based cell exhibits the highest short circuit current ( ) at 8.72 mA cm and the highest open-circuit voltage ( ) at 0.66 V, together with the best cell performance at 4.00%.
已合成了一系列基于吩噻嗪的染料（OMS1 - 3），这些染料包含不同的共轭长度以及以氰基丙烯酸为锚定基团的缺电子（氰基乙烯基）部分的数量。这些染料在389纳米至484纳米范围内呈现出宽泛的紫外 - 可见吸收。随着共轭长度和缺电子单元数量的增加，实现了更高的摩尔消光系数和更长的吸收峰。与在类似条件下制造的基于标准N719的器件（PCE = 7.49%）相比，基于这些染料的电池性能效率范围为0.68 - 4.00%。尽管OMS3染料在吩噻嗪单元之间有两个缺电子单元，但观察到的电子俘获效应不显著。从结果来看，基于OMS3的电池在8.72 mA cm²时表现出最高的短路电流（ ），在0.66 V时表现出最高的开路电压（ ），同时具有4.00%的最佳电池性能。
