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

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

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 fil...

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Bibliographic Details
Main Authors: Zhen Lu, Shangzhi Wang, Huijun Liu, Feng Feng, Wenhua Li
Format: Article
Language:English
Published: MDPI AG 2019-02-01
Series:Nanomaterials
Subjects:
Perovskite solar cell
Interfacial modification
Morphology optimization
Performance improvement
Online Access:https://www.mdpi.com/2079-4991/9/2/204
Description
Summary: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 (<i>J<sub>sc</sub></i>) of 21.9 mA&#183;cm<sup>&#8722;2</sup>.
ISSN:2079-4991

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