"Efficiencies of Perovskite Hybrid Solar Cells Influenced by Film Thick" by Kai Wang, Chang Liu et al.
 

Polymer Engineering Faculty Research

Title

Efficiencies of Perovskite Hybrid Solar Cells Influenced by Film Thickness and Morphology of CH3NH3PbI3−xClx Layer

Document Type

Article

Publication Date

Summer 6-2015

Abstract

Perovskite hybrid solar cells (pero-HSCs) have been intensively investigated due to their promising photovoltaic performance. However, the correlations between the efficiencies of pero-HSCs and thin film thicknesses and morphologies of CH3NH3PbI3−xClx perovskite layers are rarely addressed. In this study, we report the correlation between the efficiencies of “planar heterojunction” (PHJ) pero-HSCs and the thin film thicknesses and morphologies of solution-processed CH3NH3PbI3−xClx perovskite layers. Investigation of absorption spectra, X-ray diffraction patterns, atomic force microscopy and scanning electron microscopy images of CH3NH3PbI3xClx layers indicate that the efficiencies of PHJ pero-HSCs are dependent on the film thickness, as the thickness of CH3NH3PbI3xClx is less than 400 nm; whereas the efficiencies are significantly dependent on the film morphologies of CH3NH3PbI3xClx layers as the thickness is larger than 400 nm. Our studies provide a promising pathway for fabricating high efficiency PHJ pero-HSCs.

Publication Title

Organic Electronics

Volume

21

First Page

19

Last Page

26

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