Highly reproducible and photocurrent hysteresis-less planar perovskite solar cells with a modified solvent annealing method. (15th October 2016)

• Record Type: Journal Article
• Authors: Zhou, Zhonggao; Huang, Limei; Mei, Xiaofei; Zhao, Yan; Lin, Zhenghuan; Zhen, Hongyu; Ling, Qidan
• Is Part Of: Solar energy. Volume 136(2016)
• Page Start: 210
• Page End: 216
• Publication Date: 2016-10-15
• Subjects: Perovskite solar cell -- Reproducibility -- Photocurrent hysteresis-less -- Modified solvent annealing; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2016.06.068
• Languages: English
• ISSNs: 0038-092X

Abstract

Graphical abstract: A simple solvent annealing method was utilized in the inverted planar PVSCs with a structure of ITO/PEDOT:PSS/MAPbI3 /PCBM/Ca/Al. The optimized MAPbI3 active layer not only endowed the increased PCE but also the highly reproducible and photocurrent hysteresis-less properties to the devices. Highlights: A low temperature solvent annealing of PbI2 without any additives was developed. Pinhole-free and uniform MAPbI3 thin films with microscale grain sizes was obtained. PCE increased to 12.12% by 42.7%, compared with that of the control device. Highly reproducible and hysteresis-less inverted planar PVSCs demonstrated. Abstract: Highly reproducible and photocurrent hysteresis-less inverted planar perovskite solar cells were demonstrated by a modified solvent annealing method in a two-step solution deposition (modified method). PbI2 film was annealing at 40 °C using the residue solvent after spin-coating, which facilitated the subsequent CH3 NH3 PbI3 perovskite active layer with high photovoltaic properties. The resulting device present a power conversion efficiency of 12.12%, which increased 42.7% compared with that of the control device fabricated as literatures.