有機-無機混合之鈣鈦礦已經被認為是光伏電池下一個世代最有前景的材料之一。而兩步驟法是一種製備鈣鈦礦薄膜之方法，此方法容易控制薄膜的厚度、均勻性以及表面型態。本研究使用簡單、成本低廉以及高產出之超音波噴塗技術(ultrasonic spray-coating)並結合兩步驟法(two-step method)皆使用超音波噴塗技術以製備有機-無機混合之鈣鈦礦材料(perovskite materials)作為本太陽能電池之主動層。鈣鈦礦薄膜製作於經蝕刻及旋塗導電高分子PEDOT:PSS之ITO導電玻璃基材上，再利用真空蒸鍍技術蒸鍍C60及BCP分別作為電子傳輸層及電子萃取層兼電洞阻擋層，最後再蒸鍍銀作為電極。利用不同碘化鉛(PbI2)的濃度並與甲基胺碘(CH3NH3I)反應以控制整體鈣鈦礦材料的厚度，並以不同的溶劑比例控制薄膜的形貌，最後利用熱退火溫度和時間來處理此鈣鈦礦主動層，藉此探討上述條件及操控超音波噴塗技術參數對鈣鈦礦薄膜的影響。優化過之本鈣鈦礦太陽能電池其照光面積為10 mm2，最高效率之元件可以達到光電轉換效率為10.4 %，短路電流為17.4 mA cm-2，開環電壓0.83 V，填充因子為72.2 %。本研究採用此超音波噴塗技術表明大規模製造以及低成本鈣鈦礦太陽能電池的潛力。;Organic-inorganic perovskites have emerged as one of the most promising materials for next-generation photovoltaics. Two-step coating is a method to prepare the perovskite solar cells, it is good way to control film properties including thickness, uniformity, and morphology for active perovskite light absorber. Herein we combine a simple, high throughput ultrasonic spray coating process which can be compatible with the roll-to-roll fabrication process for the large scale production and two-step spray coating method to fabricate the planar hetero-junction perovskite solar cell, with a device architecture ITO / PEDOT:PSS / CH3NH3PbI3 / C60 / BCP / Ag. By manipulating the stoichiometry and concentrations of PbI2 to control the thickness and then reaction with CH3NH3I, post-annealing temperature and spray deposition parameters to optimize the perovskite active layer, the device shows the highest power conversion efficiency (PCE) of 10.4 %, short-circuit current density (JSC) of 17.4 mA cm-2, open circuit voltage (VOC) of 0.83 V and fill factor (FF) of 72.2 %. This sample way by using ultrasonic spray coating demonstrates the potential to make large-scale and low-cost perovskite solar cells.
