Fabrication and Electrochemical Study of Novel Photoanodes for Dye-Sensitized Solar Cells 洪健原、姚品全
E-mail: [email protected]
ABSTRACT
This study divided into two parts, the first part to look at a variety of (LiI, NaI, KI) and Propylene carbonate (PC)
,3-Methoxypropiontrile (MPN) and the colloidal gel polymer (polyacrylonitrile, PAN) the composition of the electrolyte system to cyclic voltammetry (cyclic voltammogram, CV) and AC impedance method (AC Impedance), etc. Characteristics of electrochemical;
as a dye-sensitized solar cells (Dye-Sensitized Solar Cell, DSSC) electrolyte systems, measurement of its Photoelectric conversion efficiency on a variety of electrolyte systems for the photovoltaic characteristics of the impact of components.
The second part of this study was primarily aimed at the working electrode, in order to spin a good TiO2 coating solution will be allocated to the ITO coated glass as working electrode after sintering, and with different thickness, to observe the heterogeneous structure of the photoelectric conversion efficiency. Electrolytes are ELM-026 (0.26 M LiI +0.05 M I2 + MPN), EKM-034 (0.34 M KI +0.01 M I2 + MPN) to observe the performance of its IV.
The results showed that TiO2 film with the working electrode is directly proportional to the number of spin-coating, and when the working electrode thickness reached at 9.1μm (six), with the best of the photoelectric conversion efficiency, when it increased again when the electrode thickness, light no further increase in power conversion efficiency, but slightly short-circuit current Jsc.
Electrochemical analysis shows: MPN solvent system, its Jlim size NaI> LiI> KI, solvent PC system, the size of its Jlim for LiI>
NaI> KI. Solvent PC / EC = 3:2, the ionic conductivity of up to 8.22 × 10-2 S / m.
Based on the above conclusions, the best known of these study process parameters: TiO2 film thickness 9.1μm, electrolyte is ELM-026, may be the largest photovoltaic conversion efficiency, η = 6.74%. The structure of TCO/P25-TiO2 (9.1μm), PV test results are as follows; VOC = 0.740V, JSC = 14.11 mA/cm2, FF = 0.56, η = 5.93%; the structure of TCO / Sol-Gel TiO2 under layer / P25-TiO2 (9.1μm), PV test results are as follows; VOC = 0.723V, JSC = 15.01 mA/cm2, FF = 0.57, η = 6.14%; the structure of TCO/SnO2 / Sol-Gel TiO2 under layer / P25-TiO2 (9.1μm), PV test results are as follows; VOC = 0.75V, JSC = 15.22 mA/cm2, FF = 0.58, η = 6.74%.
Keywords : Dye-Sensitized Solar Cell、cyclic voltammogram、AC Impedance、Polymer gel electrolyte Table of Contents
封面內頁 簽名頁
授權書...iii
中文摘要...iv
英文摘要...vi
誌謝...viii
目錄...ix
圖目錄...xii
表目錄...xvi
第一章 緒論...1
1.1 前言...1
1.2 研究動機...2
1.3 本文架構...4
第二章 文獻回顧與理論原理...5
2.1太陽電池簡介...5
2.1.1有機太陽電池...5
2.2染料敏化太陽電池之工作原理...7
2.3染料敏化太陽電池組成簡介...10
2.3.1 TiO2工作電極...10
2.3.2 染料...12
2.3.3 電解質...13
2.3.4 對電極...15
2.4 DSSC之交流阻抗等效電路...16
2.5電化學測試元件(electrochemical cell)...18
2.6循環伏安(cyclic voltammogram，CV)[29~30]...21
2.7交流阻抗( AC Impedance) [32]...23
2.7.1 基本元件：電阻、電容和電感...27
2.7.2 複合元件與簡單電路...29
第三章 實驗製備方法與儀器...41
3.1實驗設備...41
3.2藥品耗材...42
3.3 實驗方法...43
3.3.1實驗流程...43
3.3.2 ITO玻璃基板之清洗...46
3.3.3電解液配置...46
3.3.4染料配製...49
3.3.5 P25-TiO2漿料配製...52
3.3.6 TiO2薄膜光電極製備...53
3.3.7 新穎光電極製備...55
3.3.8 Pt對電極製備...57
3.3.9元件組裝...57
3.4 儀器量測分析...58
3.4.1 電化學量測...58
3.4.2 SEM分析...60
3.4.3 紫外光-可?光光譜儀(UV-VIS)分析...61
3.4.4 DSSC光電量測...61
第四章 結果與討論...64
4.1電解質系統分析...64
4.1.1電化學測試分析(一)...64
4.1.2電化學測試分析(二)...69
4.1.3 電化學測試分析(三)...83
4.2 工作電極製備分析...87
4.2.1 SEM分析...87
4.3 UV-VIS分析...92
4.3.1 D719染料於D.I Water溶劑分析[51]...92
4.3.2 D719染料於乙醇溶劑分析...95
4.4 光電量測部份...97
4.4.1 TCPP(花青素)染料系統...97
4.4.2 D719染料系統...105
4.4.3 探討Work electrode部份...113
第五章 結論與建議...121
5.1 結論...121
5.2 建議...124
參考文獻...125
口試委員提問問題與解答...132 REFERENCES
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