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。

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.

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