金银合金三角盒掺入有机正置太阳能电池的效率研究

发布时间：2018-02-03 06:07

本文关键词： 金银合金三角盒纳米颗粒局域表面等离激元有机太阳能电池二氧化硅包覆　出处：《太原理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：与无机太阳能电池相比,有机太阳能电池有很多显而易见的优点:成本低廉,原材料来源丰富,适合大面积生产,良好的柔韧性等。但因为其自身原因仍然深受低能量转化效率的阻碍,无法实现商业化生产。在有机太阳能电池中掺入金属纳米颗粒是一种有效提高其能量转化效率的方法。通过激发金属纳米颗粒的局域表面等离激元效应,其场增强和光散射效应会在活性层中大幅度提高对光的吸收能力。而且最新的研究也表明金属纳米颗粒还可以提高有机太阳能电池的电学性能。本论文具体工作如下:(1)在本文中,我们利用种子溶液生长法和置换反应成功合成了金银合金三角盒纳米颗粒。在基于PTB7:PC70BM正置结构的有机太阳能电池的缓冲层和活性层界面掺入金银合金三角盒纳米颗粒,通过优化其浓度,我们将器件的能量转化效率从6.58%提高到了7.11%,短路电流密度从13.36mA/cm2提高到了15.01mA/cm2,相比标准器件各自提高了8.1%和12.4%。通过我们系统的研究,我们发现金银合金三角盒纳米颗粒的引入不仅仅使得活性层的光吸收在一个宽谱范围内有提高,而且还使得激子在PTB7和PC70BM界面处的分离率提高。虽然颗粒的掺入也使得器件的漏电流升高,但其带来的载流子迁移率的提高效果更胜一筹,这使得最终器件表现出的填充因子的下降显得微不足道。本论文的工作将有助于高性能,低成本的有机太阳能电池的发展。(2)为了进一步提高金银合金三角盒纳米颗粒的分散性和稳定性,我们利用硅酸四乙酯(TEOS)在碱性条件下水解的原理成功在金银合金三角盒纳米颗粒外面包覆了一层二氧化硅的壳,起到阻止内部金属颗粒被氧化和分散颗粒的作用。通过紫外可见光吸收光谱和TEM图证明了通过这种方法确确实实将金银合金三角盒纳米颗粒包覆成功。包覆成功后的金银合金三角盒纳米颗粒可以溶于更多溶剂,为金银合金三角盒纳米颗粒将来的应用提供了广泛的空间。最后,我们对本论文的工作做了总结和展望,提出了未来的研究方向。
[Abstract]:Compared with inorganic solar cells, organic solar cells have many obvious advantages: low cost, abundant raw materials, suitable for large-scale production. Good flexibility and so on. But because of its own reasons are still hampered by low energy conversion efficiency. The incorporation of metal nanoparticles in organic solar cells is an effective way to improve the efficiency of energy conversion. The field enhancement and light scattering effect will greatly improve the absorption of light in the active layer. The latest research also shows that metal nanoparticles can also improve the electrical properties of organic solar cells. As follows:. (. 1) in this paper. We successfully synthesized gold and silver alloy triangular box nanoparticles by seed solution growth and displacement reaction. The interface of buffer layer and active layer of PC70BM positive structure organic solar cell is doped with gold and silver alloy triangular box nanoparticles. By optimizing its concentration, we increase the energy conversion efficiency from 6.58% to 7.11 and the short-circuit current density from 13.36 Ma / cm ~ 2 to 15.01 Ma / cm ~ 2. Compared with the standard devices, the improvement of 8.1% and 12. 4 respectively. Through our system research. We find that the introduction of gold and silver alloy triangular box nanoparticles not only increases the light absorption of the active layer in a wide spectrum range. It also increases the separation rate of exciton at the interface between PTB7 and PC70BM. Although the doping of particles also increases the leakage current of the device, the effect of the increase of carrier mobility is better. This makes the decrease of filling factor of the final device appear insignificant. The work of this paper will contribute to the high performance. Development of low-cost organic solar cells) in order to further improve the dispersion and stability of gold and silver alloy triangular box nanoparticles. Using the principle of tetraethyl silicate (TEOS) hydrolysis in alkaline condition, we successfully coated a layer of silica shell on the surface of gold and silver alloy triangular box nanoparticles. It can prevent the inner metal particles from being oxidized and dispersed. The ultraviolet and visible absorption spectra and TEM diagram prove that the gold and silver alloy triangular box nanoparticles are successfully coated by this method. The successful gold and silver alloy triangular box nanoparticles can be dissolved in more solvents. It provides a wide range of space for the application of gold and silver alloy triangular box nanoparticles in the future. Finally, we summarize and prospect the work of this paper, and propose the future research direction.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM914.4

【参考文献】