Improved Efficiency of Perovskite Solar Cells by the Interfacial Modification of the Active Layer.

Affiliation

College of Chemistry and Environmental Engineering, ShanXi DaTong University, Datong 037009, China. [Email]

Abstract

As the most promising material for thin-film solar cells nowadays, perovskite shine for its unique optical and electronic properties. Perovskite-based solar cells have already been demonstrated with high efficiencies. However, it is still very challenging to optimize the morphology of perovskite film. In this paper we proposed a smooth and continuous perovskite active layer by treating the poly (3, 4-ethylenedioxythiophene): poly (styrenesulphonate) (PEDOT:PSS) with pre-perovskite deposition and dimethylsulfoxide (DMSO) rinse. The scanning electron microscope (SEM) and atomic force microscope (AFM) images confirmed a perovskite active layer consisting of large crystal grains with less grain boundary area and enhanced crystallinity. The perovskite devices fabricated by this method feature a high power conversion efficiency (PCE) of 11.36% and a short-circuit current (Jsc) of 21.9 mAcm-2.

Keywords

Interfacial modification,Morphology optimization,Performance improvement,Perovskite solar cell,

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