基于二噻吩吡咯共軛橋連的敏化染料構(gòu)建及其光伏性能研究
發(fā)布時間：2019-05-14 18:18
【摘要】：在1991，瑞士科學家Gr tzel等人對于染料敏化太陽能電池（DSSCs）的研究取得關(guān)鍵性的突破。由于其制備工藝簡單，具有高效、低成本特點，近二十年來受到了世界各研究組的廣泛關(guān)注。 第一章，簡要的介紹了染料敏化太陽能電池（DSSCs）的研究背景、結(jié)構(gòu)組成、工作原理、主要性能參數(shù)、電極以及電解質(zhì)的發(fā)展。同時對染料敏化劑的最新研究進展進行了綜述，在此基礎(chǔ)上提出了本文設(shè)計思想和研究內(nèi)容。 第二章，設(shè)計合成以己氧基苯取代的二噻吩吡咯（DTP）作為共軛橋的三苯胺類有機光敏劑XS54-XS56，同時合成了以環(huán)戊二噻吩作為π-共軛橋光敏劑XS57作為參比。系統(tǒng)的研究了染料的光物理、電化學和光伏性能。通過電池性能測試，以4-己氧基苯取代的DTP橋三苯胺染料的電池性能要優(yōu)于相同條件下環(huán)戊二噻吩為共軛橋的染料XS57。在鈷電解質(zhì)中，AM1.5標準光照的條件下，染料XS54的短路電流為13.5mAcm 2，總的光電轉(zhuǎn)化效率可以達到8.14%。 第三章，為了深入研究DTP橋的氮取代基團對染料性能的影響，我們又合成了氮雜環(huán)取代的DTP為共軛橋的芳胺染料XS58-XS60。通過測試發(fā)現(xiàn)，引入N,N-二己基苯和咔唑基團到染料分子的DTP橋上，可以很有效的抑制電子復合，從而提高電池的短路電流和開路電壓。同時我們考察了染料浸泡時間效應對電池性能的影響，在浸泡36小時條件下，染料XS59的光電轉(zhuǎn)化效率最高達到8.20%。 第四章，為了進一步提高DTP系列染料的光伏性能，我們將六己基取代的三聚茚基三芳胺引入到染料的供電基團當中，合成了有機光敏劑M28和M29。通過與參比染料C241比較，引入三聚茚基團可以拓寬光譜吸收和提高摩爾吸光系數(shù)，而且還可以抑制電子復合，延長電子壽命。最終，染料M29電池的開路電壓可以達到到953mV，光電轉(zhuǎn)化效率也可以提高到8.5%。 第五章，吲哚啉類染料敏化電池具有較高的短路光電流密度，但是其開路電壓較低，很大程度上限制了光電性能的提高。本章中，，我們將DTP作為共軛橋連引入到吲哚啉類染料分子中，設(shè)計合成了染料XW69-XW71，并成功的將其應用到薄膜非碘基DSSCs中。在鈷電解質(zhì)中，AM1.5標準光照條件下，染料XW70電池器件獲得了943mV的開路電壓，總的光電轉(zhuǎn)化效率達到8.78%。
[Abstract]:In 1991, Swiss scientist Gr tzel et al made a key breakthrough in the study of dye-sensitized solar cell (DSSCs). Because of its simple preparation process, high efficiency and low cost, it has been widely concerned by the research groups in the world in the past two decades. In the first chapter, the research background, structure composition, working principle, main performance parameters, electrode and electrolyte development of dye-sensitized solar cell (DSSCs) are briefly introduced. At the same time, the latest research progress of dye sensitizers is reviewed, and the design idea and research content of this paper are put forward. In chapter 2, triphenylamine organic photosensitizer XS54-XS56, with hexoxybenzene substituted dithiophene polypyrrole (DTP) as conjugated bridge was designed and synthesized. Cyclopentadithiophene was used as 蟺-conjugated bridge photosensitizer XS57 as reference. The photophysical, electrochemical and photovoltaic properties of dyes were studied systematically. Through the battery performance test, the battery performance of DTP bridged triphenylamine dye replaced by 4-hexoxybenzene is better than that of cyclopentadithiophene dye XS57. with cyclopentadithiophene as conjugated bridge under the same conditions. In cobalt electrolyte, under the condition of AM1.5 standard light, the short circuit current of dye XS54 is 13.5mAcm 鈮
本文編號：2476938
[Abstract]:In 1991, Swiss scientist Gr tzel et al made a key breakthrough in the study of dye-sensitized solar cell (DSSCs). Because of its simple preparation process, high efficiency and low cost, it has been widely concerned by the research groups in the world in the past two decades. In the first chapter, the research background, structure composition, working principle, main performance parameters, electrode and electrolyte development of dye-sensitized solar cell (DSSCs) are briefly introduced. At the same time, the latest research progress of dye sensitizers is reviewed, and the design idea and research content of this paper are put forward. In chapter 2, triphenylamine organic photosensitizer XS54-XS56, with hexoxybenzene substituted dithiophene polypyrrole (DTP) as conjugated bridge was designed and synthesized. Cyclopentadithiophene was used as 蟺-conjugated bridge photosensitizer XS57 as reference. The photophysical, electrochemical and photovoltaic properties of dyes were studied systematically. Through the battery performance test, the battery performance of DTP bridged triphenylamine dye replaced by 4-hexoxybenzene is better than that of cyclopentadithiophene dye XS57. with cyclopentadithiophene as conjugated bridge under the same conditions. In cobalt electrolyte, under the condition of AM1.5 standard light, the short circuit current of dye XS54 is 13.5mAcm 鈮
本文編號：2476938
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