本文選題：二氫噻唑 + 苯并吡喃�。� 參考：《大連理工大學》2014年博士論文

【摘要】：光敏染料作為染料敏化太陽能電池(DSSCs)的核心部分,近年來被廣泛研究。由于純有機光敏染料具有易于合成、摩爾消光系數(shù)較高和成本較低等優(yōu)點,是釕金屬配合物光敏染料的理想替代品。大多數(shù)有機光敏染料具有D-π-A結(jié)構(gòu)。π-橋基起到連接電子供體和電子受體的作用且對光敏染料的光伏性能具有較大影響。 本論文設計合成了3個含苯并吡喃π-橋基和2個含二氫噻唑π-橋基的新型光敏染料,研究了這些染料的光物理和電化學性質(zhì)。作者將其應用于染料敏化太陽能電池中,研究了染料結(jié)構(gòu)與電池光電性能的關(guān)系。 含苯并吡喃π-橋基的光敏染料在400-600nm對太陽光具有較強的光譜吸收。CCl系列光敏染料應用于染料敏化太陽能電池獲得了較好的光電轉(zhuǎn)換效率,其中以CC103為光敏染料制備的電池獲得了7.5%的光電轉(zhuǎn)換效率。 對于含二氫噻唑π-橋基的光敏染料,二氫噻唑結(jié)構(gòu)單元和氰基丙烯酸基的協(xié)同吸電子作用有效地減小了光敏染料的禁帶寬度(乓),使光敏染料對太陽光光譜具有較寬的響應范圍(300-800nm)。使用鈷電解質(zhì),以CC202為光敏染料的電池獲得了6.1%的光電轉(zhuǎn)換效率。基于碘電解質(zhì),以CC201為光敏染料的電池顯示了較好的穩(wěn)定性。 為了更好地探究電池穩(wěn)定性的影響因素,本論文將以氰基丙烯酸基為電子受體的光敏染料應用于染料敏化太陽能電池,研究了染料降解的具體過程。研究表明,在水和紫外光的共同作用下,染料的吸電子基團氰基丙烯酸基降解為甲酰基,使染料從TiO2表面脫附下來,導致電池效率明顯下降。降解產(chǎn)物中甲�；难踉觼碓从陔姵刂械乃Ｒ虼�,在DSSCs的封裝過程中嚴格控制電池中的含水量及濾除紫外光,保證較好的電池密閉性,會有效提升電池的穩(wěn)定性和使用壽命。
[Abstract]:Guang Min dyes, as the core part of dye sensitized solar cells (DSSCs), have been widely studied in recent years. Pure organic Guang Min dyes have the advantages of easy synthesis, high molar extinction coefficient and low cost. Most of the organic Guang Min dyes have D- 蟺 -A structure. 蟺-bridged dyes play the role of connecting electron donors and electron receptors and have great influence on the photovoltaic properties of Guang Min dyes. In this paper, three novel Guang Min dyes containing benzopyran 蟺-bridged group and two dihydrothiazole 蟺-bridged dyes were designed and synthesized. The photophysical and electrochemical properties of these dyes were studied. The relationship between the dye structure and the photovoltaic properties of the dye sensitized solar cells was studied. Benzopyran 蟺-bridged Guang Min dyes have strong spectral absorption to solar light in 400-600nm. CCL series of Guang Min dyes have been applied to dye sensitized solar cells to obtain better photoelectric conversion efficiency. The photovoltaic conversion efficiency of the battery prepared with CC103 as Guang Min dye was 7.5%. For Guang Min dyes containing dihydrothiazole 蟺-bridged group, The synergistic electron absorption of dihydrothiazole structure unit and cyanoacrylic group can effectively reduce the bandgap of Guang Min dyes and make the Guang Min dyes have a wide range of response to the solar spectrum of 300-800nm ~ (-1). Using cobalt electrolyte, the photovoltaic conversion efficiency of the battery with CC202 as Guang Min dye was 6.1%. Based on iodine electrolyte, the battery with CC201 as Guang Min dye showed good stability. In order to better investigate the factors affecting the stability of the cell, Guang Min dye, which is based on cyanoacrylate as the electron receptor, is applied to dye sensitized solar cells, and the specific process of dye degradation is studied in this paper. The results show that the electron-absorbing group cyanoacrylic group of the dye is degraded to formyl group under the combined action of water and ultraviolet light, and the dye is desorbed from the surface of TiO2, which results in the decrease of the efficiency of the battery. The oxygen atom of formyl group in the degradation product originates from the water in the battery. Therefore, strict control of the water content in the battery and the filtering of ultraviolet light in the process of DSSCs packaging can effectively enhance the stability and service life of the battery.
【學位授予單位】：大連理工大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：TM914.4

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