高效聚合物光伏给体材料的设计与合成

发布时间：2018-01-29 07:16

本文关键词： 聚合物太阳能电池本体异质结苯并二噻吩硫属元素寡聚噻吩　出处：《北京交通大学》2017年硕士论文　论文类型：学位论文

【摘要】：与传统的无机太阳能电池相比,有机太阳能电池具有成本低、重量轻、柔性和可大面积制造等优点。对光活性层材料的改进,尤其是对共轭聚合物材料结构和性能的改进是目前聚合物太阳能电池的研究热点之一。为了探究共轭聚合物材料对光伏电池性能的影响,本文采用给体-受体组合的分子策略制备了两个系列八种聚合物太阳能电池给体材料。其中,以苯并二噻吩为给体单元,呋喃(噻吩/硒吩)并异苯并噻吩二酮为受体单元所合成的聚合物材料的光电特性与受体单元中所含有不同硫属原子有关。研究和探讨了杂原子对聚合物构型,聚合物的可加工性,电学性能,光学性能,薄膜形貌,光电转换性能等方面的影响。在实验中,我们还发现通过添加不同比例的1,8-二碘辛烷可以对其薄膜形貌产生不同程度的优化,光电转换效率显示出很大的差别。对于苯并二噻吩与苯并二噻吩二酮共聚的聚合物材料,在添加0.5%的1,8-二碘辛烷后,所制备的光伏器件的最高光电转换效率达到了 9%。此外,本文还研究了以苯并二噻吩二酮为受体单元,不同的寡聚噻吩为给体单元的聚合物材料中的噻吩数目和链接方式对共轭聚合物光电性能的影响。通过对电学性能,光学性能以及光电转换性能的比较,发现当n=2时,相应的聚合物具有最佳的光电转换性能。
[Abstract]:Compared with traditional inorganic solar cells, organic solar cells have the advantages of low cost, light weight, flexibility and large area fabrication. Especially the improvement of the structure and properties of conjugated polymer materials is one of the hot spots of polymer solar cells. In order to explore the impact of conjugated polymer materials on the performance of photovoltaic cells. In this paper, two series of eight kinds of polymer solar cell donor materials were prepared by using donor-receptor combination molecular strategy, in which benzodithiophene was used as donor unit. The photoelectric properties of polymer materials synthesized by furan (thiophene / selenophene) and isobenzothiophene diketone are related to the different sulfur atoms in the receptor unit. The influences of processability, electrical properties, optical properties, film morphology, photoelectric conversion properties and so on. In the experiment, we also found that by adding different proportion of 1. 8-diiodooctane can optimize the morphology of the films to varying degrees, and the photoelectric conversion efficiency is very different. For the polymeric materials of benzodithiophene and benzodithiophene diketone copolymerization. The maximum photovoltaic conversion efficiency of the photovoltaic device was up to 9 after the addition of 0.5% (1 / 8-diiodooctane). In addition, the benzodithiophene diketone was used as the receptor unit. The effects of thiophene number and linking mode on the photoelectric properties of conjugated polymers with different oligomeric thiophene as donor units. The electrical, optical and photoelectric properties of the conjugated polymers were compared. It is found that when n = 2:00, the corresponding polymer has the best photoelectric conversion performance.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM914.4

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