Room-temperature mixed-solvent-vapor annealing for high performance perovskite solar cells

• Published in: Journal of materials chemistry. A, Materials for energy and sustainability Vol. 4; no. 1; pp. 321 - 326
• Main Authors: Yu, Hao, Liu, Xiaodong, Xia, Yijun, Dong, Qingqing, Zhang, Kaicheng, Wang, Zhaowei, Zhou, Yi, Song, Bo, Li, Yongfang
• Format: Journal Article
• Language: English
• Published: 01.01.2016
• Subjects: Annealing; Crystallinity; Electrodes; Energy conversion efficiency; Perovskites; Photovoltaic cells; Solar cells; Thin films
• ISSN: 2050-7488; 2050-7496
• DOI: 10.1039/c5ta08565a

In this paper, we introduce a room-temperature mixed-solvent-vapor annealing (rtMSVA) method to fabricate high performance perovskite solar cells (pero-SCs) based on MAPbI3-xClx without the need for thermal annealing (TA). An ultra-smooth perovskite thin-film with high crystallinity was obtained by the DMF/CB mixed-solvent (1 : 20, v/v) vapor annealing at room-temperature without TA and the power conversion efficiency (PCE) of the pero-SCs reached 16.4%. More importantly, the reproducibility of the PCEs is quite good among 40 different devices. Furthermore, large active area pero-SCs were fabricated with the rtMSVA method. The PCEs of the pero-SCs based on ITO and flexible PET/Ag mesh electrodes with an active area of 1.21 cm2 reached 11.01% and 7.5%, respectively. We anticipate that rtMSVA would very possibly become a promising crystallization method for the fabrication of large area pero-SCs in the near future.