Issue 13, 2016

SFX as a low-cost ‘Spiro’ hole-transport material for efficient perovskite solar cells

Abstract

Four spiro[fluorene-9,9′-xanthene] (SFX) derivatives, SFX-TAD, SFX-TCz, SFX-TPTZ and SFX-MeOTAD have been synthesized for use as hole-transport materials and fully characterized by 1H/13C NMR spectroscopy, mass spectrometry, XRD and DSC. Their thermal, optical and electrochemical properties were investigated. The use of different substituents affects the highest occupied molecular orbital (HOMO) energy level proving the versatility of the central core towards the facile and low-cost preparation of spiro-hole-transport materials. Among the synthesized SFX derivatives, SFX-MeOTAD was employed as hole-transporting material (HTM) and the performance tested in perovskite solar cells with device architecture glass/FTO/compact TiO2/mesoporous Al2O3/CH3NH3PbI3−xClx/HTM/Au. SFX-MeOTAD gave a comparable efficiency to spiro-MeOTAD, demonstrating great potential for use of the SFX family as cost effective and versatile hole conductors facilitating commercialization of perovskite solar cells (PSCs).

Graphical abstract: SFX as a low-cost ‘Spiro’ hole-transport material for efficient perovskite solar cells

Supplementary files

Article information

Article type
Paper
Submitted
05 Jan 2016
Accepted
29 Feb 2016
First published
02 Mar 2016
This article is Open Access
Creative Commons BY license

J. Mater. Chem. A, 2016,4, 4855-4863

Author version available

SFX as a low-cost ‘Spiro’ hole-transport material for efficient perovskite solar cells

M. Maciejczyk, A. Ivaturi and N. Robertson, J. Mater. Chem. A, 2016, 4, 4855 DOI: 10.1039/C6TA00110F

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