因電洞傳導物質(Hole Transport Matirial ,HTM)滲透能力不良，造成孔洞填充(pore-filling)情況不佳的問題，使固態染料敏化太陽能電池中TiO2光電極的最佳厚度受到限制(約2微米)，導致光電轉換效率尚無法達到液態染料敏化太陽能電池的成效，故本研究利用離心灌注的製程改善孔洞填充不佳的情況，進而提升TiO2光電極最佳厚度。
本研究中先針對不同的量測效率條件做測試，確保光電轉換效率值的準確性。而在改善孔洞填充方面，本研究中發展出一套離心灌注的製程取代傳統的旋轉塗佈製程，利用離心灌注所產生的力場，改善電洞傳導物質在TiO2光電極孔洞中的滲入情況，進而使提升光電極的最佳厚度、電洞傳導物質濃度。結果顯示，P3HT搭配染料D131的DSSC系統，使用離心灌注法最佳參數效率(厚度:4μm,P3HT:20mg/ml,η:1.71% )可比旋轉塗布法參數的效率 (厚度1.5μm,P3HT:15mg/ml,η:1.5%)提高14%；實驗亦探討其他染料搭配離心灌注法的影響，實驗中使用有機染料SQ2搭配P3HT組成DSSC，其光電極厚度增加後，經IPCE量測，其IPCE值提高的範圍較使用染料D131廣，結果顯示，使用離心灌注法最佳參數的效率 (厚度:4μm,P3HT:20mg/ml,η:1.26%)，可比旋轉塗布法參數的效率(厚度1.5μm,P3HT:15mg/ml,η:0.9%)提高40%，經SEM、IPCE、UV-Visible證明，使用離心灌注法可在高光電極厚度時改善孔洞填充的情況。本研究亦將離心灌注法運用在小分子的電洞傳導物質Spiro-OMeTAD上，但提升效果不如P3HT顯著，推測是因為Spiro-OMeTAD的分子較P3HT小，故孔洞填充問題較不嚴重，導致使用離心灌注法的效果較不明顯。

There are two factors limit the TiO2 potoelectrode thickness of solid state DSSC(only about 2μm) which will cause the efficiency lower than liquid electrolyte-based DSSC. The two factors are electron-hole recombination and incomplete filling of mesoporous TiO2 with HTM.
In this study, we forcus on the problem of pore filling and solve the problem by using a new method - centrifugation that replace conventional spin coating for the deposition of the hole transport materials . By centrifugation, we can create a centrifugal force and let the HTM infiltrate into the mesoporous TiO2. The results show that in the devices using the P3HT and dye D131, the efficiency with the optimum parameters of centrifugation (TiO2 thickness:4μm, P3HT:20mg/ml,η:1.71%) is 14% higher than the efficiency with the parameters of spin coating( TiO2 thickness:1.5μm,P3HT:15mg/ml,η:1.5%).And we also study on the effect of devices with dye SQ2 and using centrifugation to deposit P3HT. The results show that the efficiency with the optimum parameters of centrifugation (η:1.26%) is 40% higher than the efficiency with the parameters of spin coating(η:0.9%).In this study we also use centrifugation apply to depositing Spiro-OMeTAD. The result shows that the effect of centrifugation in Spiro-OMeTAD is unapparent compare with P3HT. The reason for this result is that the molecular size of Spiro-OMeTAD is smaller than P3HT. So the problem of pore filling is not so serious for Spiro-OMeTAD compare with P3HT.

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