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系統識別號 U0026-1107201216155900
論文名稱(中文) 暫態光電壓/光電流量測技術應用於染料敏化太陽能電池之研究
論文名稱(英文) Transient photovoltage/photocurrent characterization for dye-sensitized solar cells
校院名稱 成功大學
系所名稱(中) 光電科學與工程學系
系所名稱(英) Department of Photonics
學年度 100
學期 2
出版年 101
研究生(中文) 陳韋先
研究生(英文) Wei-Hsien Chen
學號 L76994073
學位類別 碩士
語文別 中文
論文頁數 99頁
口試委員 指導教授-陳昭宇
口試委員-郭宗枋
口試委員-王智明
中文關鍵字 染料敏化太陽能電池  暫態量測  缺陷能態密度  光電化學  太陽能電池物理 
英文關鍵字 dye-sensitized solar cell  transient  electrochemistry  dynamics of charge transport 
學科別分類
中文摘要 我們透過量測暫態光電壓/光電流衰減的方法對染料敏化太陽能電池(DSC)進行分析,透過暫態的方法在某照光強度下輸入一微擾光訊號觀察暫態光電壓在開路狀態下與光電流在短路狀態下微擾結束的衰減情形來探測元件內部電子的壽命與缺陷能態密度分布,而在不同工作條件下量測光電壓與光電流的衰減可以得知載子傳輸動力學的相關參數,此外加上載子萃取的方法能夠更精確得量測載子總電荷量以及化學電容。
目前國內外太陽能電池研究機構亦有使用暫態之量測方法,但普遍需要自行建構量測系統並無商業化機台提供選購,因此我們與阜拓科技產學合作共同開發暫態光電壓/光電流量測系統,此為多功能之量測系統包含:電流-電壓特性曲線量測模組、暫態光電壓/光電流量測模組、載子萃取量測模組、與光電流線性檢測。
我們利用暫態量測技術應用在染料敏化太陽能電池的分析上,探討不同商用品之二氧化鈦光陽極在相同載子濃度下的載子壽命與缺陷能態密度分布;並利用暫態分析電解液內不同TBP濃度對DSC的影響;此外我們利用染料SQ2與TF5共吸附使元件在吸收光譜的部分互補,創造出更佳的光電轉換效率,在此也利用暫態技術分析染料共吸附在二氧化鈦奈米晶體表面上之復合反應、DOS分布與不同工作狀態下的傳輸參數。
英文摘要 We characterize dye-sensitized solar cells (DSCs) by photovoltage/photocurrent transient measurement. Devises are biased by Keithley 2400 with different light intensity imposed by a pulse as a perturbation. Transient technic is a small-amplitude time-resolved method which can obtain parameters of charge recombine and transport kinetics. Measuring photovoltage decay at open-circuit condition and photocurrent decay at short circuit condition with different light bias we can get electron lifetime, recombination rate constant, chemical capacitance, density of trap states, photoinduced charge density verse different open-circuit voltage. Measuring photovoltage and photocurrent decay at different working condition we can obtain electron transport time, charge collection efficiency, diffusion coefficient, diffusion length at different bias and light intensity.
So many research center in the word use transient measurement system to characterize DSCs. In Taiwan there is no commercialized transient system so we develop the system with Forter which is an instrument company. The system includes I-V measurement, transient measurement, charge extraction, and current linearity test.
We use the system to compare two commercial TiO2 for DSCs. We analyze devises by electron lifetime at different charge concentration, capacitance at different open-circuit voltage, and density of states distribution. In the electrolyte, we discuss how TBP affect the DSC. Furthermore, we use transient technic to see what happened when dye SQ2 and dye TF5 co-sensitized on the TiO2. By complementing the absorbed spectrum of SQ2 and TF5, we want to create more efficient DSCs.
論文目次 摘要 i
Abstract ii
致謝 iv
目錄 v
表目錄 vii
圖目錄 viii
第1章 緒論 1
1.1 太陽能電池發展過程 1
1.2 太陽能電池原理 7
1.2.1 p-n接面簡介 7
1.2.2 光電轉換原理 10
1.3 太陽能電池種類 11
1.3.1 矽基太陽能電池 11
1.3.2 薄膜太陽能電池 14
1.3.3 染料敏化太陽能電池 16
第2章 暫態光電壓/光電流量測技術回顧 20
2.1 文獻回顧 20
2.2 暫態光電壓/光電流量測理論 21
2.3 暫態光電壓/光電流量測方法 23
2.4 其他量測技術之比較 27
2.5 研究動機與目的 29
第3章 元件製備與參數分析 31
3.1 元件製備 31
3.2 空氣質量(air mass,AM)與輻照度(irradiance) 32
3.3 暫態量測系統與儀器設備 34
3.3.1 暫態光電壓/光電流量測系統 34
3.3.2 光源設計與調校 39
3.3.3 數位電源電錶與示波器 45
3.4 電流-電壓曲線量測模組 46
3.4.1 理想化太陽能電池等效電路模型 47
3.4.2 非理想化太陽能電池等效電路模型 49
3.4.3 電流-電壓特性曲線參數分析 49
3.5 暫態光電壓/光電流量測模組 57
3.5.1 暫態光電壓/光電流對不同光強度量測 57
3.5.2 暫態光電壓/光電流在不同工作狀態量測 66
3.6 載子萃取模組 75
3.7 元件電流輸出對光強線性度檢測 77
第4章 利用暫態量測分析染敏電池 80
4.1 利用暫態分析不同二氧化鈦製成的染敏電池 80
4.2 分析TBP在碘系統電解液中對染敏電池的影響 83
4.3 暫態分析SQ2與TF5染料共吸附元件 87
第5章 結論與未來發展 94
參考文獻 96
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