本文選題：染料敏化太陽能電池 + 三苯胺��； 參考：《西南大學》2017年碩士論文

【摘要】：有機太陽能電池具有來源廣、成本低、載流子遷移率高等優(yōu)點,在太陽能電池領(lǐng)域受到了廣泛的關(guān)注。近年來,該領(lǐng)域的科研工作者們都致力于提高有機太陽能電池的光電轉(zhuǎn)化效率。經(jīng)過多年的發(fā)展,有機小分子/聚合物太陽能電池的實驗室最高效率已經(jīng)超過了11%,n-型染料敏化太陽能電池的效率也已經(jīng)超過了13%。但相比于無機太陽能電池,效率還不算高,仍然有著很大的發(fā)展空間。有機材料在太陽能電池中起著重要的作用,合適的材料可以有效地提高光捕獲能力和電荷分離效率以及減少電荷復合等,進而提高電池效率。因此,通過設(shè)計合成合理的有機材料來提高有機太陽能電池的效率是非常必要的。本論文中,我們設(shè)計合成了一些有機太陽能電池材料,并對它們的光伏性能進行了研究。主要內(nèi)容包括以下三個方面:1、設(shè)計合成了三個基于三苯胺的D-π-A型有機染料分子(Q1、Q2和Q3)并將其應(yīng)用于染料敏化太陽能電池中,研究了染料分子的結(jié)構(gòu)對染料敏化太陽能電池性能的影響。結(jié)果表明:己氧基和己基噻吩基團的引入可以有效地阻止電荷復合,有利于電荷轉(zhuǎn)移。另外,我們發(fā)現(xiàn)TiO2經(jīng)TiCl4處理后對應(yīng)的DSSCs的效率并不一定有所提高,這與染料分子的結(jié)構(gòu)也有一定的關(guān)系。Q1分子中的三苯胺基團上只有一個己基噻吩基團,Q2分子則引入了一個己基噻吩基團和一個己氧基基團。經(jīng)TiCl4處理后,基于Q1和Q2染料分子的太陽能電池效率均有所提升。然而引入兩個己基噻吩基團的Q3分子的電池效率并無明顯提升。2、設(shè)計合成了一種新型近紅外方酸菁染料分子(TPE-SQ),并將其應(yīng)用于三元有機太陽能電池中。研究結(jié)果發(fā)現(xiàn):TPE-SQ分子表現(xiàn)出良好的溶解性和吸光能力,在近紅外光區(qū)(600~750 nm)有一個尖銳且強烈的吸收帶,并且在薄膜上的吸收也很寬,吸收范圍為550~900 nm。我們將TPE-SQ摻雜入P3HT:PC_(71)BM二元體系中制得三元有機太陽能電池,發(fā)現(xiàn)TPE-SQ分子增強了近紅外光區(qū)的吸收,與P3HT:PC_(71)BM二元體系形成很好的互補,這樣有利于拓寬太陽能電池的吸收范圍以捕獲更多的光子。光伏數(shù)據(jù)表明,低摻雜量的TPE-SQ分子可以有效地提升有機太陽能電池的光電轉(zhuǎn)化效率。經(jīng)TPE-SQ摻雜后,三元太陽能電池光電轉(zhuǎn)化效率達到3.93%,相比二元體系提升了近20%。3、TPE-SQ是一種典型的方酸菁分子,核心結(jié)構(gòu)是一個缺電子單元,很容易被親核試劑進攻,如含巰基的化合物等,導致共軛結(jié)構(gòu)發(fā)生改變,從而產(chǎn)生顏色和熒光發(fā)射的變化,達到檢測的目的。我們利用紫外吸收和熒光發(fā)射光譜就TPE-SQ分子對含硫氨基酸,即硫醇,包括半胱氨酸(Cys)、谷胱甘肽(GSH)和同型半胱氨酸(Hcy)的檢測效果進行了探究。結(jié)果發(fā)現(xiàn):TPE-SQ分子對硫醇的檢測表現(xiàn)出很好的選擇性。同時,探針分子的靈敏度也很高,對Cys、GSH和Hcy的最低檢測限分別為9.8 nM、12.4 nM和9.7 nM。因此,TPE-SQ可以作為一種比率熒光探針來檢測硫醇。
[Abstract]:Organic solar cells have attracted wide attention in the field of solar cells for their advantages of wide source, low cost and high carrier mobility. In recent years, researchers in this field have been working to improve the photoelectric conversion efficiency of organic solar cells. After years of development, the laboratory efficiency of organic small molecule / polymer solar cells has exceeded that of 11g / n-type dye sensitized solar cells. But compared with inorganic solar cells, the efficiency is not high, there is still a lot of room for development. Organic materials play an important role in solar cells. The appropriate materials can effectively improve the photocapture ability, charge separation efficiency and reduce the charge recombination, and then improve the efficiency of the cell. Therefore, it is necessary to improve the efficiency of organic solar cells by designing and synthesizing reasonable organic materials. In this thesis, we have designed and synthesized some organic solar cell materials and studied their photovoltaic properties. The main contents include the following three aspects: 1. Three D- 蟺 -A organic dye molecules (Q1OQ2 and Q3) based on trianiline were designed and synthesized and applied to dye sensitized solar cells. The effect of the structure of dye molecules on the performance of dye sensitized solar cells was studied. The results show that the introduction of hexoxy and hexyl thiophene groups can effectively prevent the charge recombination and is beneficial to charge transfer. In addition, we found that the efficiency of DSSCs treated with TiCl4 was not necessarily improved. There is only one hexyl thiophene group and one hexoxy group are introduced in Q1 molecule. After treatment with TiCl _ 4, the efficiency of solar cells based on Q _ 1 and Q _ 2 dye molecules was improved. However, the efficiency of Q3 molecules with two hexyl thiophene groups was not significantly improved. A novel near infrared acid cyanine dye molecule (TPE-SQ) was designed and synthesized and applied to ternary organic solar cells. The results show that the molecule of 1: TPE-SQ exhibits good solubility and absorptivity. There is a sharp and strong absorption band in the near infrared region (600 ~ 750nm), and the absorption on the thin film is very wide. The absorption range is 550 ~ 900 nm. A ternary organic solar cell was prepared by doping TPE-SQ into the binary system of P3HT: PC71BM. It was found that TPE-SQ enhanced the absorption in the near-infrared region and was complementary to the binary system of P3HT: PC71BM. This helps to broaden the absorption range of solar cells to capture more photons. Photovoltaic data show that TPE-SQ molecules with low doping amount can effectively improve the photoconversion efficiency of organic solar cells. After doping with TPE-SQ, the photoconversion efficiency of the ternary solar cell reaches 3.933, which is nearly 20.3% higher than the binary system. TPE-SQ is a typical acid cyanine molecule. The core structure is an electron-deficient unit, which is easy to be attacked by nucleophilic reagents. For example, compounds containing sulfhydryl group lead to the change of conjugate structure, which results in the change of color and fluorescence emission. The detection of thiol, including cysteine (Cys), glutathione (GSH) and homocysteine (Hcy) by TPE-SQ molecule was studied by UV absorption and fluorescence emission spectroscopy. The results showed that the detection of mercaptan by the weight TPE-SQ molecule showed a good selectivity. At the same time, the sensitivity of the probe molecule is also very high. The minimum detection limits for Cystrol GSH and Hcy are 9.8 nM 12.4 nm and 9.7 nm respectively. Therefore, TPE-SQ can be used as a ratio fluorescence probe to detect mercaptan.
【學位授予單位】：西南大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM914.4

【參考文獻】

相關(guān)期刊論文 前1條

1 黃飛;張凱;;有機太陽能電池[J];科學;2016年03期

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本文編號：2086357