本文選題：噻唑　切入點：有機染料　出處：《復旦大學》2014年碩士論文　論文類型：學位論文

【摘要】：含有噻唑及其衍生物的有機光電功能材料,由于其特有的n型半導體材料特性,廣泛應(yīng)用于各種光電領(lǐng)域,然而其在染料敏化太陽能電池中卻鮮有應(yīng)用。因此將此類拉電子基團應(yīng)用到有機染料中,構(gòu)造D-A-π-A結(jié)構(gòu)的有機光敏染料,可以有效的降低染料分子的帶隙并拓寬吸收,同時調(diào)節(jié)染料分子的LUMO/HOMO能級。因此,本論文圍繞著噻唑類有機光敏染料作了一系列嘗試,具體研究內(nèi)容如下：(1)基于并噻唑基團的平面性和拉電子特性,設(shè)計并制備了四個含有不同烷氧基鏈長度的有機光敏染料,通過比較四個染料的光物理、電化學以及光伏性能,發(fā)現(xiàn)帶有不同烷氧基鏈的染料由于具有極其類似的電子結(jié)構(gòu),因而表現(xiàn)出了非常接近的光物理和電化學性質(zhì)。但是,相應(yīng)的準固態(tài)染料敏化的太陽能電池卻表現(xiàn)出了完全不同的電池性能,其中含有兩個辛氧基的染料所組裝的準固態(tài)電池在標準太陽光下獲得了5.1%的能量轉(zhuǎn)化效率。(2)基于氟代苯并噻二唑?qū)UMO能級的調(diào)控能力,設(shè)計并制備了單氟或雙氟取代的苯并噻二唑類有機染料,分別獲得了含有一個給電子基團和兩個給電子基團的染料分子。當兩個染料吸附于TiO2薄膜后,其吸收光譜均覆蓋了整個可見光區(qū),表現(xiàn)出了很好的光響應(yīng)特性。然而,將兩個染料組裝于染料敏化太陽能電池中后,電池的電流較小,這是因為氟原子的引入拉低了LUMO能級,造成了電荷注入驅(qū)動力不足。因此,我們通過調(diào)節(jié)TiO2導帶邊能級以及調(diào)控電解質(zhì)中添加劑的含量等手段,使電池性能得到了提升。(3)基于吡啶吡噻二唑?qū)θ玖衔展庾V的調(diào)控能力,設(shè)計并制備了含有吡啶并噻二唑基團的有機染料。通過這樣的分子設(shè)計成功地拓寬了染料分子的吸收,使其延伸到了近紅外光區(qū),以更加充分地吸收太陽光。然而由于吡啶并噻二唑過強的缺電子特性,造成其LUMO能級降低過多,使得染料在光照激發(fā)后產(chǎn)生的大量電子無法有效地注入到Ti02導帶中。我們通過調(diào)節(jié)TiO2導帶邊能級來提高電荷注入效率,使得相應(yīng)的染料敏化電池效率提高了8倍。
[Abstract]:Organic optoelectronic functional materials containing thiazole and its derivatives are widely used in various optoelectronic fields due to their unique n-type semiconductor materials. However, it is rarely used in dye sensitized solar cells. Therefore, the formation of organic Guang Min dyes with D-A- 蟺 -A structure can effectively reduce the band gap and broaden the absorption of dye molecules. Therefore, a series of attempts have been made around thiazole organic Guang Min dyes. The main contents are as follows: 1) based on the planar and electronic properties of thiazolyl groups, Four organic Guang Min dyes with different alkoxyl chain lengths were designed and prepared. By comparing the photophysical, electrochemical and photovoltaic properties of the four dyes, it was found that the dyes with different alkoxyl chains had very similar electronic structures. Thus showing very close photophysical and electrochemical properties. However, the corresponding quasi-solid-state dye sensitized solar cells exhibit completely different performance. The quasi solid state cell composed of two octoxyl dyes has achieved an energy conversion efficiency of 5.1% under standard sunlight) based on the ability of Fluorobenzothiadiazole to regulate the LUMO energy level. Monofluorinated or disfluorinated benzothiadiazole organic dyes were designed and prepared. Dye molecules containing one electron donor group and two electron donor groups were obtained, respectively. When two dyes were adsorbed on TiO2 film, The absorption spectra all covered the whole visible light region, showing a good light response. However, when the two dyes were assembled in the dye sensitized solar cells, the current of the cells was small because the introduction of fluorine atoms lowered the LUMO energy level. Therefore, we can adjust the TiO2 conduction band edge energy level and the content of additives in the electrolyte, and so on. Based on the ability of pyridine pyrithiadiazole to regulate the absorption spectra of dyes, organic dyes containing pyridine thiadiazole groups were designed and prepared. It is extended to the near infrared region to absorb solar light more fully. However, the LUMO energy level of pyridine thiadiazole is reduced too much because of its strong electron deficiency. A large number of electrons produced by the dye excited by light can not be injected into the Ti02 conduction band effectively. We improve the charge injection efficiency by adjusting the edge energy level of the TiO2 conduction band, which increases the efficiency of the dye sensitized cell by 8 times.
【學位授予單位】：復旦大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM914.4

【共引文獻】

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1 譚海軍;三苯胺、氮雜蒽類D-π-A型有機染料的合成與光伏性能[D];中南大學;2013年

2 王蕾;以馬來酸酐、喹VA啉和吡啶-N-氧化物為鑲嵌基團的光敏劑在染料敏化太陽能電池中的應(yīng)用[D];大連理工大學;2014年

3 張月;基于碘基和鈷基電解質(zhì)的染料敏化太陽能電池的研究[D];天津大學;2014年

相關(guān)碩士學位論文 前3條

1 周林磊;D-D-π-A型三苯胺類光敏染料的制備與光電性質(zhì)研究[D];電子科技大學;2013年

2 張怡平;基于吩VA嗪的有機染料的合成及其光伏性能[D];中南大學;2014年

3 吳華彪;不同橋鍵香豆素類染料敏化劑的合成及性能研究[D];浙江工業(yè)大學;2014年

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本文編號：1575884