近年來，有機無機混成鈣鈦礦太陽能電池效率急劇發展，至今年為止效率已有顯著地突破，其轉換效率已可媲美市面上主流多晶矽太陽能電池，由於其可藉由調變鈣鈦礦組成元素成分，進而調整半導體能隙大小以及表面形貌，且可以溶液製程製備太陽能電池，大幅降低製程上的成本，故作為太陽能電池裝置，鈣鈦礦是未來極具潛力的材料。但目前有機無機混成鈣鈦礦太陽能電池熱穩定性不佳，且尚缺乏可放大太陽能電池面積與連續生產之有效製程方法。 是故，本實驗透過調變鈣鈦礦結構，並使用超音波噴塗法結合真空萃取技術，在大氣環境下成功製備全無機鈣鈦礦CsPbI2Br太陽能電池。利用無機元素銫(Cs+)取代有機陽離子甲胺(MA+)、甲脒(FA+)，解決有機陽離子受高溫會逸散的問題，藉此提升鈣鈦礦太陽能電池的熱穩定性。此外，製程上使用超音波噴塗設備，提供了大面積與連續製程的可能性，對於太陽能電池工業化生產做出了良好的示範。再者，結合真空萃取技術(Vacuum-Extraction Technique)，有效解決結晶成核過程與退火長晶過程的競爭關係，以形成平整且光滑的高品質鈣鈦礦薄膜，在製程優化後，再由添加醋酸鉛(Pb(Ac)2)改變鈣鈦礦成膜性質，獲得最高光電轉換效率10.06%，由太陽能電池特性曲線獲得開路電壓1.12 V、短路電流密度13.99 mA cm-2及填充因子64.81%，提供了另一種形式在大氣下製備穩定的全無機鈣鈦礦太陽能電池。 ;All-inorganic cesium-based CsPbX3 perovskite solar cells are regarded as one of most promising forms due to the superior thermal stability compared to organic-inorganic hybrid perovskite. However, it has been challenging to achieve these high-quality films over large areas using scalable methods under realistic ambient conditions. Herein, we investigate the perovskite crystal growth and morphology control by vacuum-assisted strategy for ambient scalable ultrasonic spray coating fabrication of all-inorganic CsPbI2Br perovskite films. As a result, the process can produce highly crystalline, uniform, and pinhole-free CsPbI2Br films and the planar structure of perovskite solar cells based on ITO/SnO2/CsPbI2Br/PTAA/Au were fabricated. Moreover, additive engineering strategies of Lead(II) acetate (Pb(Ac)2) were used to address the defect of perovskite nanocrystal. Ultimately, the optimized CsPbI2Br perovskite solar cells shows maximum power conversion efficiency (PCE) of 10.06% with a open-circuit voltage (Voc) of 1.12 V, short-circuit current density (Jsc) of 13.99 mA cm-2, and fill factor (FF) of 64.81%. Overall, we demonstrated the high throughput ultrasonic spray-coating method as a lab‐to‐fab translation tool for solution‐processed of all-inorganic CsPbI2Br perovskite films at ambient condition.
