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標題: | 新型巨基團有機染料及膠態電解質於銅錯合物染敏電池之表現 On the Performance of Copper–Based Dye-Sensitized Solar Cells Using Organic Dyes with Novel Bulky Group and Gel Electrolyte |
作者: | 李語昕 Yu-Hsin Lee |
指導教授: | 何國川 Kuo-Chuan Ho |
共同指導教授: | 孫世勝 Shih-Sheng Sun |
關鍵字: | 染料敏化太陽能電池,銅錯合物電解質,膠態電解質,直接接觸,有機染料, Dye-sensitized solar cells,copper-based electrolyte,polymer-gel electrolyte,direct-contact,organic sensitizers, |
出版年 : | 2024 |
學位: | 碩士 |
摘要: | 這篇論文主要是探討染料敏化太陽能電池(Dye-Sensitized Solar Cells, DSSCs)的應用,主要分為兩個不同的主題,分別為新型有機敏化劑在染料敏化太陽能電池中的應用(第3章)以及膠態電解質於染料敏化太陽能電池上的表現(第4章)。這兩個研究所皆是以銅錯合物為染敏電之電解質,並探討其效應。此外,兩個研究的概述將在引言中呈現(第1章)。此外,實驗步驟將在第2章詳細介紹。
在第3章中,我們合成了一種名為EE186的新型染料作為光敏化劑,應用於以銅電解質為主的DSSCs中。這種光敏化劑之推電子基具有一個巨大的基團。我們對電池在標準太陽光和室內光照條件下的性能進行了分析,此外,也進行了二氧化鈦(TiO2)膜厚的優化。結果顯示了在這兩種照明環境下所需的最佳TiO2膜厚呈現的相反關係。雖然在陽光下的性能不及商業敏化劑Y123(9%),但透過將厚度減少到只有2層TiO2 之主動層(Main layer, ML),進一步使效率改善至8%。另一方面,在使用T5螢光燈的200照度的室內光照射下,具有2層主動層和2層散射層(Scattering layer, SL)的電池,其效率與商業染料Y123相當(21%)。此外,在較高光強度下,特別是6000照度下,效率提升至35%。根據文獻,這項研究為首次針對具有此種新型巨基團之推電子基的染料進行探討,同時揭示了具有這種類型給體的敏化劑在室內光採集方面的潛力。 在第4章中,則是將研究重心放在染敏電池之電解質部分,主要為探討採用Cu2+/Cu1+氧化還原對之電解質加入高分子膠化劑所形成之半固態染敏電池(Qusai-Solid DSSCs),在特定條件下探討其性能和穩定性,並著重在探討其室內光情形下之表現。在標準太陽光情況下則是評估了具有7% PVDF-HFP的元的性能。雖然光電效率略低於液態電池,但膠態電池表現出傑出的性能以及更好的穩定性,而在1200小時後仍保持接近其初始值的效率。 隨後,為優化在室內照明條件下的電解質組成。結果顯示,較低濃度的Cu2+/Cu1+銅離子錯合物更有助於提升短路電流,因為競爭吸光較少的緣故,導致效率提升。再者,通過簡易優化Cu(dmby)2TFSI (Cu1+)、Cu(dmby)2TFSI2 (Cu2+)、NMBI和LiTFSI的組成,使元件在T5 6000照度的室內光照下達到30%的效率。此外,研究還探討了可印刷式於室內光照條件下的應用。結果顯示在6000照度的照明條件下,將PMMA添加到PEO電解質中可以實現29%的效率。在研究的最後,通過直接接觸的電池組裝方式,進一步優化了膠態電池的表現,以獲得更高效率,在6000照度下的效率約36%。 This thesis mainly focuses on two different but related parts, namely, novel organic sensitizers for copper-based cells applications (Chapter 3), and the preparation of gel-state DSSCs incorporating copper-based electrolyte (Chapter 4). The overview of these two applications will be displayed in the Introduction (Chapter 1). Moreover, the experimental procedures (Chapter 2). In Chapter 3, in this research, we synthesized a novel sensitizer called EE186 for integration into copper-mediated dye-sensitized solar cells (DSSCs). This sensitizer features a bulky donor designed to be compatible with the copper redox electrolyte. We conducted a thorough analysis of the cell''s performance under both 1 sun and ambient light conditions. The results revealed a converse relationship in the required TiO2 thickness for these two illumination environments. While the performance under sunlight fell short of the commercial sensitizer Y123 (9%), we achieved an 8% efficiency improvement by reducing the thickness to just 2 main layers from the original TiO2 layer with 2 scattering layers. Surprisingly, when exposed to 200 lux of room light from a T5 fluorescent tube, the cell with 2 main layers plus two scattering layers incorporating the novel sensitizer EE186 achieved a comparable efficiency to the commercial dye Y123. Furthermore, the efficiency soared to 35% under higher light intensity, specifically 6000 lux. This study marks the first investigation of a dye featuring a novel crowded donor, revealing that a sensitizer with this type of donor holds potential applications in dim light harvesting. In Chapter 4, this study delves into the performance and stability of quasi-solid-state dye-sensitized solar cells (QS-DSSCs) employing a Cu2+/Cu1+ redox couple, using various polymer gel electrolytes (PGEs) under specific conditions. Initially, the device''s performance with 7 wt% poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) is evaluated under one sun conditions. While the efficiency is slightly lower than the liquid-state cell, the quasi-solid-state cell exhibits promising performance and significantly better stability, maintaining an efficiency of almost 100% of its initial value after 1200 h. Subsequently, electrolyte composition is optimized for indoor lighting conditions. Results indicate that a lower concentration of Cu(dmby)2TFSI / Cu(dmby)2TFSI2 is beneficial for higher short-circuit current density due to lower light absorbance. By optimizing the composition of Cu(dmby)2TFSI, Cu(dmby)2TFSI2, for indoor light conditions, the device achieves an efficiency of 30% under 2000 lux illumination. Furthermore, the study also explores the application of printable PGEs under indoor light conditions. It is observed that the addition of poly (methyl methacrylate) (PMMA) to the poly(ethylene oxide) (PEO) electrolytes achieves efficiencies of 29% respectively, under 6000 lux illumination. Finally, the gel-state cells were optimized by the direct-contact strategies to get higher efficiencies about 36% |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/92324 |
DOI: | 10.6342/NTU202400457 |
全文授權: | 同意授權(限校園內公開) |
顯示於系所單位: | 化學工程學系 |
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