Issue 33, 2018

Low-temperature solution-processed vanadium oxide as hole transport layer for efficient and stable perovskite solar cells

Abstract

In recent years, great progress has been achieved in improving the power conversion efficiency (PCE) of organic–inorganic hybrid perovskite solar cells (PSCs), but the stability of PSCs is still an obstacle in their commercialization due to the limitation of efficient and stable hole transport materials. Herein, we demonstrate an alcohol-solution-based low-temperature-processed vanadium oxide (VOx) hole transport layer (HTL) for planar heterojunction PSCs. The good crystallinity and morphology of CH3NH3PbI3 grown on this amorphous VOx film is investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. Due to the suitable and matching energy levels of VOx and CH3NH3PbI3, the holes generated in CH3NH3PbI3 can efficiently transfer to VOx HTL. Furthermore, VOx-HTL-based PSCs yield a PCE value of 14.5% with better stability in comparison with PEDOT:PSS-HTL-based PSCs. These results reveal that the low-temperature-processed VOx films can be employed as the HTL for efficient and stable PSCs.

Graphical abstract: Low-temperature solution-processed vanadium oxide as hole transport layer for efficient and stable perovskite solar cells

Supplementary files

Article information

Article type
Paper
Submitted
21 May 2018
Accepted
31 Jul 2018
First published
01 Aug 2018

Phys. Chem. Chem. Phys., 2018,20, 21746-21754

Low-temperature solution-processed vanadium oxide as hole transport layer for efficient and stable perovskite solar cells

Q. Guo, C. Wang, J. Li, Y. Bai, F. Wang, L. Liu, B. Zhang, T. Hayat, A. Alsaedi and Z. Tan, Phys. Chem. Chem. Phys., 2018, 20, 21746 DOI: 10.1039/C8CP03223H

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