【摘要】：聚合物光伏材料的結構設計和器件優(yōu)化是提高聚合物太陽能電池能量轉換效率的主要手段。通過主鏈和側鏈的結構設計,可以有效地調節(jié)聚合物光伏材料的吸收光譜、消光系數(shù)、分子能級、空穴遷移率等諸多性質。本文就選取了兩類典型的聚合物光伏材料,通過對這兩類材料進行主鏈和側鏈結構設計及器件優(yōu)化,有效地提高了它們在聚合物太陽能電池中的表現(xiàn)。主要研究結果如下:1.在基于DTG單元的共軛聚合物中通過主鏈設計合成了四種聚合物光伏材料,并系統(tǒng)地研究了這些聚合物的光電屬性、結晶性以及它們在聚合物太陽能電池中的應用。研究表明,通過主鏈設計可以有效地優(yōu)化這類聚合物的光伏屬性,為這類材料的結構設計提供了有益的參考。2.通過在聚合物材料PB1的側鏈中引入烷硫基官能團設計并合成了聚合物PB1-S。與PB1相比,含有烷硫基側鏈的聚合物PB1-S具有更高的摩爾消光系數(shù)和空穴遷移率,并在聚合物太陽能電池中表現(xiàn)出大幅提高的短路電流密度和能量轉換效率。3.在基于BDT單元的共軛聚合物中同時進行主鏈和側鏈的結構設計,合成了一系列光伏聚合物。系統(tǒng)地研究了這些材料的基礎性質和在新型非富勒烯太陽能電池中的應用,獲得了10.49%的能量轉換效率。4.對基于PB1:IT-M的高效率非富勒烯太陽能電池進行了界面優(yōu)化的研究。通過對比研究陰極界面PFN和PFN-Br在器件中的不同表現(xiàn),提出了非富勒烯太陽能電池陰極界面的傳輸機理,為這種新型的太陽能電池陰極界面的選擇提供了參考。
[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.
【學位授予單位】：北京科技大學
【學位級別】：博士
【學位授予年份】：2017
【分類號】：TM914.4;O631

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相關期刊論文 前2條

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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本文編號：2172889