基于PTB7的光电器件制备及其性能的研究

发布时间：2018-06-09 02:41

  本文选题：有机太阳能电池 + 有机红外光探测器　； 参考：《太原理工大学》2017年硕士论文

【摘要】：有机太阳能电池和有机红外光探测器具有制备成本低廉、易于大面积生产、对环境污染小等优点,受到了人们的广泛关注。研究人员从高效聚合物的合成、新型器件结构的设计等方面出发,逐步提高有机太阳能电池和有机红外光探测器的性能。然而,有机太阳能电池的光电转换效率(PCE)以及其在空气中的稳定性,都无法与传统的硅基太阳能电池相媲美;有机红外光探测器也存在光响应度和光探测率不高等缺点。本文的工作主要分为两个部分:第一,通过不同极性的有机溶剂处理有机太阳能电池的空穴传输层PEDOT:PSS,提高了PEDOT:PSS的电导率,并利用处理之后的PEDOT:PSS提高了基于PTB7有机太阳能电池的效率。第二,制备了一种活性层为PTB7:CNT:PCBM的有机红外光探测器,利用有机聚合物PTB7的光生偶极子,促进碳纳米管CNT内部光生激子的解离,从而提高探测器的红外光响应度和探测率。本文的主要研究内容如下:1.利用极性较大的六种有机溶剂二甲基甲酰胺、二甲基亚砜、甲酰胺、甲醇、乙醇、异丙醇,分别处理PEDOT:PSS水溶液,研究了不同极性溶剂对PEDOT:PSS的电导率产生的影响。结果表明,二甲基亚砜对PEDOT:PSS导电性的提高最为明显。2.本文选用二甲基亚砜处理PEDOT:PSS,并制备了结构为ITO/PEDOT:PSS(DMSO处理)/PTB7:PCBM/ZnO/Al的有机太阳能电池,通过优化二甲基亚砜的掺杂比例,最终使器件的光电转换效率从6.3%提高到6.5%。且器件在空气中的稳定性也得到了提升。3.制备了一种结构为ITO/PEDOT:PSS/PTB7:CNT:PCBM/ZnO/Al的有机红外光探测器。本文从活性层溶液浓度和碳纳米管的掺杂比例入手,优化了器件的性能,获得了一种高效的红外光探测器,器件在波长为1100 nm处的探测率高达2.3×1011 Jones。4.通过与结构为ITO/PEDOT:PSS/P3HT:CNT:PCBM/ZnO/Al的有机红外光探测器对比,证明了偶极聚合物PTB7中的光生偶极子可以增强器件的内建电场,从而促进了纳米碳管CNT内部光生激子的解离,并且,光生偶极子的数目与激子的解离率成正比。
[Abstract]:Organic solar cells and organic infrared detectors have been paid more and more attention due to their advantages of low cost, easy to produce in large areas and low pollution to the environment. In order to improve the performance of organic solar cells and infrared detectors, the researchers began to improve the performance of organic solar cells and infrared detectors from the aspects of the synthesis of high efficiency polymers and the design of new device structures. However, the photovoltaic conversion efficiency of organic solar cells (PCEs) and its stability in the air are not comparable to those of traditional silicon based solar cells. The work of this paper is mainly divided into two parts: first, the conductivity of PEDOT: PSS is improved by treating the hole transport layer PEDOT: PSSs of organic solar cells with different polarity organic solvents. The efficiency of organic solar cells based on PTB 7 was improved by PEDOT: PSS. Secondly, an organic infrared photodetector with an active layer of PTB7: CNT: PCBM was prepared. The photoinduced dipole of the organic polymer PTB7 was used to promote the photodissociation of the photoexcitons in CNT, so as to improve the infrared photoresponse and detection rate of the detector. The main contents of this paper are as follows: 1. The effects of polarity solvents such as dimethylformamide, dimethyl sulfoxide, formamide, methanol, ethanol and isopropanol on the conductivity of PEDOT: PSS were studied. The results showed that dimethyl sulfoxide enhanced the conductivity of PEDOT: PSS most obviously. In this paper, dimethyl sulfoxide (DMSO) was used to treat PEDOT: PSSs, and an organic solar cell with the structure of ITO / PEDOT: PSSDMSO / PTB7: PCBMP / ZnO / Al was prepared. By optimizing the doping ratio of dimethyl sulfoxide, the photoelectric conversion efficiency of the device was improved from 6.3% to 6.5%. And the stability of the device in the air has also been improved. 3. An organic infrared detector with the structure of ITO / PEDOT: PSS / PTB 7: CNT: PCBM / ZnO / Al was prepared. Based on the concentration of active layer solution and the doping ratio of carbon nanotubes, the performance of the device is optimized, and an efficient infrared detector is obtained. The detector's detectivity is as high as 2.3 脳 1011 Jones.4at 1100 nm. By comparing with the organic infrared detector with the structure of ITO / PEDOT: PSS / P3HT: CNT: PCBMR / ZnO / Al, it is proved that the photoinduced dipole in the dipolar polymer PTB7 can enhance the internal electric field of the device, thus promoting the dissociation of the photonic excitons in the CNT nanotube. The number of photoinduced dipoles is proportional to the dissociation rate of excitons.
【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;TN215
，

本文编号：1998459