吲哚染料的合成与性能研究以及二种卟啉化合物的合成

发布时间：2018-04-29 08:14

本文选题：染料敏化太阳能电池 + 吲哚染料　；参考：《天津理工大学》2014年硕士论文

【摘要】：染料敏化太阳能电池（DSSC），自从O’Regan和Gr tzel.报道后，作为一种新型的光伏技术，已经被认为是一种可靠的即将替代传统的无机硅太阳能电池，，因为它们容易组装，高效率，低成本。为了获取更高的光电转化效率，很多研究都集中在光敏染料的设计和合成上面，以及深入理解太阳能电池界面间反应的本质过程。根据相关文献报道，芳香胺有机染料的结构容易修饰，分子容易合成，既有很高的摩尔消光系数，有很大的利用性，这些优点使的芳香胺有机染料引起很大的关注。在本文中，设计合成了三种新型吲哚类染料XS45-47，研究了染料中芴基和叔丁基苯结构对电子复合的影响，具有大π键结合的芴基团的引入促进了吸收光谱的红移和增大了摩尔吸光系数(ε)，同时抑制了电子在二氧化钛/电解质界面的复合；XS45和XS46具有D-A-π-A结构，通过引入苯并噻二唑（BTD）吸电子基团，拓宽染料的光谱响应范围。进一步研究了钴电解质（E2）DSSC的电流-电压（J-V）曲线。钴电解质DSSC的PCE与碘电池有相同的趋势，即XS45 XS47 XS46。所有的钴电解质电池相对于碘电解质电池表现出, JSC显著下降, VOC显著增大。此外，无论选择哪种电解质或者膜厚，XS46的VOC值比XS45/XS47低。通过电荷提取技术测量开路电荷密度和控制强度调制光电压谱（IMVS）测得的开路（τ）中的电子寿命，得出XS45/XS47的VOC比XS46高是因为电子寿命增加了，即延迟电子复合速率，而不是TiO2的导带位移。在钴电解质中，膜厚为6μm电池比3μm的电池的JSC值高，可能由吸附的染料量的增加而引起。12μm的电池的JSC显著降低，这是由于多吡啶钴电解质的质量传输速度慢和电子易复合相关。另一方面，VOC随着膜厚的增加而降低，这是因为膜表面积增加，提供了额外的电子复合位点，增强了暗电流。对比碘电解质，钴电解质电池中膜的厚度对电流的影响是不同的。虽然使用较厚的膜可以获得的更好的光捕获效率，但是也导致了JSC值下降。
[Abstract]:Dye-sensitized solar cells have been grown since O'Regan and Gr tzel. After the report, as a new type of photovoltaic technology, it has been considered a reliable alternative to the traditional inorganic silicon solar cells, because they are easy to assemble, high efficiency, low cost. In order to achieve higher photovoltaic conversion efficiency, many studies have focused on the design and synthesis of Guang Min dyes, as well as in-depth understanding of the essential process of the interfacial reaction of solar cells. According to the related literature, the structure of aromatic amine organic dyes is easy to modify and the molecules are easy to be synthesized, which has high molar extinction coefficient and great utilization. These advantages have attracted great attention of aromatic amine organic dyes. In this paper, three new indole dyes, XS45-47, were designed and synthesized. The effects of the structure of fluorene and tert- on the electron recombination were studied. The introduction of fluorene group with large 蟺 bond promotes the red shift of absorption spectrum and increases the molar absorptivity (蔚). At the same time, it inhibits the electron composition XS45 and XS46 with D-A- 蟺 -A structure at the TIO _ 2 / electrolyte interface. By introducing benzothiadiazolium (BTD) as an electron absorbent group, the spectral response range of dyes was broadened. The current-voltage J-V curves of cobalt electrolyte E 2 O 2 D DS SC have been further studied. The PCE of cobalt electrolyte DSSC has the same trend as that of iodine battery, that is, XS45 XS47 XS46. Compared with iodine electrolyte cells, JSC decreased significantly and VOC increased significantly in all cobalt electrolyte cells. In addition, the VOC value of XS46 is lower than that of XS45/XS47. The electron lifetime in open circuit (蟿) measured by charge extraction technique is obtained by measuring open circuit charge density and controlled intensity modulated photovoltage spectrum. It is concluded that the VOC of XS45/XS47 is higher than that of XS46 because of the increase of electron lifetime, that is, delayed electron recombination rate. Instead of the TiO2's conduction band displacement. In cobalt electrolyte, the JSC value of the cell with film thickness of 6 渭 m is higher than that of the cell with 3 渭 m film thickness, which may be caused by the increase of the amount of dye adsorbed, which may cause the decrease of JSC of the battery of .12 渭 m, which is due to the slow mass transfer speed of polypyridine cobalt electrolyte and the easy recombination of electrons. On the other hand, the VOC decreases with the increase of the film thickness, which is due to the increase of the membrane surface area, providing additional electron recombination sites and increasing the dark current. Compared with iodine electrolyte, the effect of the thickness of the film on the current of cobalt electrolyte battery is different. Though the thicker film can obtain better light capture efficiency, it also leads to the decrease of JSC value.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：R914.5

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