本研究使用預先合成粉末法製備甲脒鉛碘鈣鈦礦粉末，對比文獻中常見的前驅物溶液法容易因化學劑量造成大量缺陷、低質量且再現性差之問題。預合成粉末法則能提拱精確的化學劑量比例，進而製備出高質量、高再現性之鈣鈦礦太陽能電池。並以醋酸甲脒、氯化甲脒及溴進一步優化元件。由實驗結果發現:以預先合成粉末法所製備之元件內部缺陷密度較低，其平均效率從12.5%提升至13.5%，且幾乎無遲滯效應產生(遲滯<0.03)。為了提升整體效率，本文以預先合成粉末法最為基礎，將醋酸甲脒粉末添加進鈣鈦礦溶液中，成功消除裂痕將效率提升至14.4%。接著再以氯化甲脒進行共添加，製備份出高結晶度的鈣鈦礦薄膜，使傳輸阻力下降，進一步使元件效率提升至17.2%。以醋酸甲脒/氯化甲脒共添加元件雖然有17%的效率，但未封裝狀態下6小時後效率開始下降，因此本文以預合成粉末的方式將溴取代部的碘，成功將穩定時間提升了16倍，且效率同樣達到17%。

In this study, the pre-synthetic powder method was used to prepare formamidinium lead iodide perovskite. The common precursor solution method in the literature tended to cause a lot of defects, low quantity and poor reproducibility in comparison with pre-synthetic method because of chemical dosing. The pre-synthetic powder method can make chemical dose ratios more precisely to prepare high-quality and high-reproducibility perovskite solar cells. Further, it can optimize the components with formamidine acetate (FAAc), formamidinium chloride (FACl) and bromide (Br). According to the experimental results, the components prepared by the pre-synthetic powder method had the property of lower internal defect density. This method enhanced the efficiency from 12.5% to 13.5% and almost no hysteresis effect generated (hysteresis<0.03). In order to enhance overall efficiency, this study added FAAc powder into our perovskite solution based on pre-synthetic powder method and successfully eliminated the cracks and increased the efficiency to 14.4%. Then, co-added FACl to fabricate perovskite thin film with high crystallinity, drcrease the transmission resistance and improve the efficiency to 17.2%. Although the co-addition of components with FAAc/FACl has 17% efficiency, the efficiency would decrease after 6 hours without encapsulating. Therefore, this study used the pre-synthetic powder method in substituting bromide for part of the iodine. It successfully increased the stabilization time by 16 times, and the efficiency also reach 17%.

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