两类典型聚合物光伏材料的主链与侧链结构设计及器件优化
发布时间：2018-08-08 19:59
【摘要】：聚合物光伏材料的结构设计和器件优化是提高聚合物太阳能电池能量转换效率的主要手段。通过主链和侧链的结构设计,可以有效地调节聚合物光伏材料的吸收光谱、消光系数、分子能级、空穴迁移率等诸多性质。本文就选取了两类典型的聚合物光伏材料,通过对这两类材料进行主链和侧链结构设计及器件优化,有效地提高了它们在聚合物太阳能电池中的表现。主要研究结果如下:1.在基于DTG单元的共轭聚合物中通过主链设计合成了四种聚合物光伏材料,并系统地研究了这些聚合物的光电属性、结晶性以及它们在聚合物太阳能电池中的应用。研究表明,通过主链设计可以有效地优化这类聚合物的光伏属性,为这类材料的结构设计提供了有益的参考。2.通过在聚合物材料PB1的侧链中引入烷硫基官能团设计并合成了聚合物PB1-S。与PB1相比,含有烷硫基侧链的聚合物PB1-S具有更高的摩尔消光系数和空穴迁移率,并在聚合物太阳能电池中表现出大幅提高的短路电流密度和能量转换效率。3.在基于BDT单元的共轭聚合物中同时进行主链和侧链的结构设计,合成了一系列光伏聚合物。系统地研究了这些材料的基础性质和在新型非富勒烯太阳能电池中的应用,获得了10.49%的能量转换效率。4.对基于PB1:IT-M的高效率非富勒烯太阳能电池进行了界面优化的研究。通过对比研究阴极界面PFN和PFN-Br在器件中的不同表现,提出了非富勒烯太阳能电池阴极界面的传输机理,为这种新型的太阳能电池阴极界面的选择提供了参考。
[Abstract]:The structure design and device optimization of polymer photovoltaic materials are the main means to improve the energy conversion efficiency of polymer solar cells. Through the structure design of the main chain and side chain, the absorption spectrum, the extinction coefficient, the molecular energy level and the hole mobility can be effectively regulated by the structure of the main chain and side chain. The two types of codes are selected in this paper. Type of polymer photovoltaic materials, through the design of the main chain and side chain structure and the optimization of the two kinds of materials, effectively improve their performance in the polymer solar cells. The main results are as follows: 1. in the conjugated polymer based on the DTG unit, four kinds of polymer photovoltaic materials are designed and synthesized by the main chain, and the system is systematic. The photoelectric properties, crystallinity and their application in polymer solar cells are studied. The study shows that the photovoltaic properties of these polymers can be effectively optimized by the main chain design, which provides a useful reference for the structure design of this kind of materials by introducing alkanyl officials in the side chain of the polymer material PB1. It is designed and synthesized that polymer PB1-S. has a higher molar extinction coefficient and hole mobility compared with PB1, which contains alkyl side chain, and shows a significant increase in short circuit current density and energy conversion efficiency in polymer solar cells by.3. in the conjugated polymer based on BDT unit at the same time. A series of photovoltaic polymers are synthesized by the structure design of the side chain. The basic properties of these materials and the application in the new type of non fullerene solar cells are systematically studied. The 10.49% energy conversion efficiency.4. has been obtained for the study of the interface optimization of the high efficiency non fullerene solar cells based on PB1:IT-M. According to the different performance of the cathode interface PFN and PFN-Br in the device, the transmission mechanism of the cathode interface of the non fullerene solar cell is proposed, which provides a reference for the selection of this new type of solar cell cathode interface.
【学位授予单位】：北京科技大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：TM914.4;O631
本文编号：2172889
[Abstract]:The structure design and device optimization of polymer photovoltaic materials are the main means to improve the energy conversion efficiency of polymer solar cells. Through the structure design of the main chain and side chain, the absorption spectrum, the extinction coefficient, the molecular energy level and the hole mobility can be effectively regulated by the structure of the main chain and side chain. The two types of codes are selected in this paper. Type of polymer photovoltaic materials, through the design of the main chain and side chain structure and the optimization of the two kinds of materials, effectively improve their performance in the polymer solar cells. The main results are as follows: 1. in the conjugated polymer based on the DTG unit, four kinds of polymer photovoltaic materials are designed and synthesized by the main chain, and the system is systematic. The photoelectric properties, crystallinity and their application in polymer solar cells are studied. The study shows that the photovoltaic properties of these polymers can be effectively optimized by the main chain design, which provides a useful reference for the structure design of this kind of materials by introducing alkanyl officials in the side chain of the polymer material PB1. It is designed and synthesized that polymer PB1-S. has a higher molar extinction coefficient and hole mobility compared with PB1, which contains alkyl side chain, and shows a significant increase in short circuit current density and energy conversion efficiency in polymer solar cells by.3. in the conjugated polymer based on BDT unit at the same time. A series of photovoltaic polymers are synthesized by the structure design of the side chain. The basic properties of these materials and the application in the new type of non fullerene solar cells are systematically studied. The 10.49% energy conversion efficiency.4. has been obtained for the study of the interface optimization of the high efficiency non fullerene solar cells based on PB1:IT-M. According to the different performance of the cathode interface PFN and PFN-Br in the device, the transmission mechanism of the cathode interface of the non fullerene solar cell is proposed, which provides a reference for the selection of this new type of solar cell cathode interface.
【学位授予单位】：北京科技大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：TM914.4;O631
【参考文献】
相关期刊论文 前2条
1 Wenchao Zhao;Shaoqing Zhang;Jianhui Hou;;Realizing 11.3% efficiency in fullerene-free polymer solar cells by device optimization[J];Science China(Chemistry);2016年12期
2 Zhi-Guo Zhang;Yongfang Li;;Side-chain engineering of high-efficiency conjugated polymer photovoltaic materials[J];Science China Chemistry;2015年02期
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