High reproducibility of perovskite solar cells via a complete spin-coating sequential solution deposition process. (December 2015)

• Record Type: Journal Article
• Authors: Zhang, Zhirong; Wei, Dong; Xie, Bixia; Yue, Xiaopeng; Li, Meicheng; Song, Dandan; Li, Yingfeng
• Is Part Of: Solar energy. Volume 122(2015)
• Page Start: 97
• Page End: 103
• Publication Date: 2015-12
• Subjects: Perovskite -- Solar cells -- Reproducibility -- Sequential solution deposition process; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2015.08.028
• Languages: English
• ISSNs: 0038-092X

Abstract

Highlights: A complete spin-coating sequential solution deposition process was proposed. Spin-coating of pristine isopropanol has important significance in CH3 NH3 PbI3 films. The reproducibility of perovskite solar cells was significantly improved. Abstract: The controllability of conditions and parameters, in a certain procedure that adopted to prepare perovskite absorption layer, play a crucial role in morphology and crystallization of the resulting films, which is of great impact on the reproducibility of solar cells. Here we propose a complete spin-coating sequential solution deposition (spinning-SSD) process, in which a high concentration CH3 NH3 I precursor was spin-coated on PbI2 -coated substrate insteading of immersing procedure; the pristine isopropanol was spin-coated to ameliorate the surface morphology and improve the quality of the resulting CH3 NH3 PbI3 films both before and after the spin-coating of CH3 NH3 I solution. Utilizing this spinning-SSD process, we fabricated meso-structured perovskite solar cells, and these devices exhibited decent performance and high reproducibility, achieving an average power conversion efficiency of 11.3% with the standard deviation as low as ±0.52. This optimized approach is expected to be used for fabricating high-performance perovskites solar cells with a full printable process.