本論文主要是針對反置型鈣鈦礦太陽能電池中的鈣鈦礦吸收層，利用快速沉積結晶法製備平整鈣鈦礦薄膜，利用此方法不僅可大幅降低實驗的製程時間，也可獲得平整且覆蓋率百分之百的鈣鈦礦薄膜，來提升對光捕捉的能力，再利用本實驗室所合成之低溫二氧化鈦致密層，保護鈣鈦礦吸收層，避免孔洞造成銀電極與鈣鈦礦吸收層之碘離子產生反應而形成碘化銀，造成效率以及壽命穩定性都不佳，而低溫二氧化鈦致密層增加鈣鈦礦電池的壽命以及穩定性還有再現性，進而提升短路電流密度(Jsc)和填充因子(FF)，使整體的光電轉換效率(PCE)提升。本論文採用DCB為快速沉積結晶法之非溶劑的溶液，經過快速沉積結晶法後獲得一完整鈣鈦礦薄膜且效果比文獻中大多使用的甲苯效果還要好。而建立了實驗室完整鈣鈦礦太陽能電池基礎參數，從最初短路電流密度5.53mA/cm2提升到9.44mA/cm2和填充因子從0.42提升到0.556，光電轉換效率從1.4%提升到4.6%，而之後再電子傳輸層上旋塗低溫二氧化鈦致密層，使鈣鈦礦薄膜被保護，壽命以及穩定性以及效率都大幅提升，而短路電流密度9.44mA/cm2提升到11.6mA/cm2和填充因子從0.556提升到0.573，光電轉換效率從4.6%提升到5.52%，且經過測試旋塗二氧化鈦後的電池其壽命跟穩定性都大幅提升。

The purpose of this study is to focus on the absorption layer of perovskite solar cell, using the method of fast deposition-crystallization to make a flat perovskite film. We can use this method not only reduce the experiment time but also obtain the flat and hundred percent converge perovskite film to enhance the ability to capture light. We can protect the perovskite absorption layer by using the low-temperature TiO2 compact layer which we synthesis by our lab. The low-temperature TiO2 compact layer can avoid the holes to make iodide which in the perovskite absorption layer to react with silver and become AgI. The AgI can cause efficiency, life and stability are poor. The low-temperature TiO2 compact layer can promote the life, stability and reproducibility of perovskite solar cells. And then enhance the short-circuit current density (Jsc) and fill factor (FF), so that the overall photoelectric conversion efficiency (PCE) is increased. The method of FDC is using DCB to be a non-solvent solution. We obtain a complete perovskite film by FDC and the final result is better than toluene that mostly used in the literature. We make a basic parameters of perovskite solar cell in our lab and the short-circuit current density enhances from 5.53mA/cm2 up to 9.44mA/cm2, the fill factor enhances from 0.42 up to 0.556, the value of photoelectric conversion efficiency rises from 1.4% to 4.6%.And then we spin-coated low-temperature TiO2 compact layer on the electron transport layer to make the perovskite film be protected. Life ,stability and efficiency is significantly improved ,and the short-circuit current density enhances from 9.44mA/cm2 up to 11.6mA/cm2, the fill factor enhances from 0.556 up to 0.573, the value of photoelectric conversion efficiency rises from 4.6% to 5.52%.We find that the life and stability of solar cells is increased after we spin-coated TiO2 layer.

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