以液相退火法製備鈣鈦礦薄膜及缺陷鈍化處理提升電光伏性能效果;Fabricating Perovskite Films via Liquid Medium Annealing and Defects Passivation to Boost Photovoltaic Performance

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题名:	以液相退火法製備鈣鈦礦薄膜及缺陷鈍化處理提升電光伏性能效果;Fabricating Perovskite Films via Liquid Medium Annealing and Defects Passivation to Boost Photovoltaic Performance
作者:	余瑋倫;Yu, Wei-Lun
贡献者:	化學工程與材料工程學系
关键词:	鈣鈦礦太陽能電池;液相退火;製程時間縮短;缺陷鈍化;奧斯特瓦爾德熟化;perovskite solar cells;liquid medium annealing;shortened processing time;defect passivation;Ostwald ripening
日期:	2023-07-26
上传时间:	2024-09-19 14:45:34 (UTC+8)
出版者:	國立中央大學
摘要:	鈣鈦礦太陽能電池優秀的光電性質及相對矽晶太陽能電池更簡易的製備方式，使其成為太陽能產業的超級新星，但目前鈣鈦礦退火時間普遍較長，縮短製程時間便成為走向商業化的一大課題。本研究提出了液相退火(Liquid medium annealing， LMA) 製程，在前兩個部分進行 LMA 製程的條件優化，成功將 LMA製程縮短至 3 分 20 秒，並有效增加鈣鈦礦的平均粒徑並提升光伏表現。接著在本研究的最後一部分探討溴化甲脒 (Formamidinium Bromide， FABr) 對鈣鈦礦層的表面鈍化，在各項分析中皆顯示經過 FABr 鈍化後的鈣鈦礦膜缺陷減少，也能藉由引起 Ostwald ripening 來使鈣鈦礦結晶進一步增大，更由穩定性測試中證明其能增加穩定性，最後 VOC 提升至 1.122 V， PCE 上升至 22.01%，成功的以短時間製程製備出高效率與高穩定性的鈣鈦礦太陽能電池。;Perovskite solar cells have gained significant attention in the solar industry due to their excellent optoelectronic properties and simpler fabrication process compared to silicon solar cells. However, the prolonged annealing time required for perovskite solar cells is a major challenge in achieving commercialization. In this study, we propose a liquid medium annealing (LMA) process to address this issue. The LMA process was optimized in the first two parts of the study, successfully reducing the annealing time to 3 minutes and 20 seconds while increasing the average grain size of the perovskite film and improving the photovoltaic performance. In the final part of the study, we investigate the surface passivation of the perovskite layer using formamidinium bromide (FABr). Various analyses demonstrate that the FABr passivation reduces the defects in the perovskite film and further increases the crystal size through Ostwald ripening. Stability tests also confirm its ability to enhance stability. As a result, the VOC increases to 1.122 V, and the power conversion efficiency (PCE) reaches 22.01%. This study successfully demonstrates the fabrication of high-efficiency and high-stability perovskite solar cells through a shortened processing time.
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