本論文探討將三種前置溶劑依不同比例混合，以溶液加工法製備成鈣鈦礦太陽能電池元件的研究。使用反向結構：ITO glass / PEDOT：PSS (AI 4083) / perovskite / PCBM / BCP / Ag作為研究基礎。內容主要為兩大部分，第一部分為溶液加工法的使用及成效；第二部分為三種前置溶劑的特性與混合後的探討。

選用氯苯作為溶液加工法的沖洗溶劑，在旋塗鈣鈦礦層的過程中滴入氯苯藉由離心力帶走多餘溶劑，再經低溫退火形成緻密且均質的結晶、覆蓋率100%的鈣鈦礦薄膜，可有效優化和電子、電洞傳輸層的接面及減少再結合現象。

三種前置溶劑為二甲基亞碸（Dimethylsulfoxide, DMSO）、γ-丁內酯（gamma-Butyrolactone, GBL）及二甲基甲醯胺（N, N-Dimethylformamide, DMF），這些溶劑各有不同的沸點、揮發速度及其他特性，將三者依不同比例混合製備成元件，並探討其中的差異與趨勢。發現到在適當的比例趨勢之下，不僅能發揮單溶劑或雙溶劑的優勢，更能互相補足缺點，以提升整體元件的效能。而在極端或不適當的比例趨勢之下，三種溶劑無法有效匹配，反而導致元件效能降低。

最後以DMSO：GBL：DMF為5：2：3的比例成功製備出Voc=0.89 V，Jsc=19.45 mA/cm2，FF=0.76，效率高達13.1%的反向鈣鈦礦太陽能電池。重要的是，混合三溶劑以溶劑量比例為DMSO ≥ DMF > GBL的趨勢所製備成的鈣鈦礦太陽能電池再現性高，製作成本低，更能有不錯的光電轉換效率。

The thesis discusses the study of mixing three kinds of precursor solvents by different proportions and using solvent engineering to fabricate perovskite solar cells. We use inverted structure: ITO glass / PEDOT: PSS (AI 4083) / perovskite / PCBM / BCP / Ag as our base in this research. The main content is divided into two parts. In the first part, we describe the use and effectiveness of solvent engineering. In second part, we describe the characteristics of the three precursor solvents and the study of mixing triple solvents.
We choose chlorobenzene as washing solvent in solvent engineering. Dropping chlorobenzene can remove excess solvents by centrifugal force during spin coating process of making perovskite layer. Then we can get dense and homogeneous crystals and 100% coverage perovskite thin film after low-temperature annealing, which can effectively not only optimize the junction of electron and hole transport layer, but also reduce recombination.
Three kinds of precursor solvents are Dimethylsulfoxide (DMSO), gamma-Butyrolactone (GBL) and N, N-Dimethylformamide (DMF), these solvents have different boiling point, evaporation rate and other characteristics. We mix these three solvents in different proportions to fabricate cells and explore the differences and trends. We found that in appropriate proportion trend, the cells not only can play the advantages of single solvent or double solvents, but also can complement each other’s shortcomings to enhance the effectiveness of the overall cells. While in extreme or inappropriate proportion trend, this three solvents can’t match to each other effectively, so lead the performance worse.
Finally, we use the ratio of DMSO:GBL:DMF=5:2:3 to fabricate inverted perovskite solar cell with Voc=0.89 V，Jsc=19.45 mA/cm2，FF=0.76 and PCE=13.1% successfully. Importantly, the perovskite solar cells with the trend of mixed triple solvents volume DMSO≥DMF>GBL have high reproducibility, low costs and good photoelectric conversion efficiency.

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