Jump to main content
Jump to site search


Mixed hole transport material employing a highly planar conjugated molecule for efficient and stable perovskite solar cells

Abstract

We successfully demonstrated a simple and facile way to improve the efficiency and stability of perovskite solar cells by using a mixed hole transport material, which was a composite of Spiro-OMeTAD and a conjugated small molecule, DRSBDT-2OT. The DRSBDT-2OT with acceptor-donor-acceptor (A-D-A) structure exhibits highly molecule planarity via noncovalent intramolecular S···O interactions, leading to comparatively low reorganization energy and high hole mobility. Thanks to the surface passivation effect of DRSBDT-2OT in the mixed HTM and the increased hole mobility in comparison with the spiro-OMeTAD, the mixed HTM-based device exhibits a significantly enhanced efficiency of 21.31%, which is much higher than that of single-component HTM-based devices. Furthermore, the mixed HTM-based devices are much more stable than the control devices using Sprio-OMeTAD as HTM. These findings would pave the way for the rational design of planar hole-transport materials for mixed HTMs toward efficient and stable perovskite solar cells.

Back to tab navigation

Supplementary files

Article information


Submitted
06 Dec 2019
Accepted
06 Feb 2020
First published
07 Feb 2020

J. Mater. Chem. A, 2020, Accepted Manuscript
Article type
Paper

Mixed hole transport material employing a highly planar conjugated molecule for efficient and stable perovskite solar cells

X. Ji, T. Zhou, X. Ke, W. Wang, S. Wu, M. Zhang, D. Lu, X. Zhang and Y. Liu, J. Mater. Chem. A, 2020, Accepted Manuscript , DOI: 10.1039/C9TA13365H

Social activity

Search articles by author

Spotlight

Advertisements