Incorporation of Vanadium(V) Oxide in Hybrid Hole Transport Layer Enables Long-term Operational Stability of Perovskite Solar Cells

Marina M. Tepliakova, Aleksandra N. Mikheeva, Lyubov A. Frolova, Aleksandra G. Boldyreva, Aly Elakshar, Artyom V. Novikov, Sergey A. Tsarev, Marina I. Ustinova, Olga R. Yamilova, Albert G. Nasibulin, Sergey M. Aldoshin, Keith J. Stevenson, Pavel A. Troshin

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Recent studies have shown that charge transport interlayers with low gas permeability can increase the operational lifetime of perovskite solar cells serving as a barrier for migration of volatile decomposition products from the photoactive layer. Herein we present a hybrid hole transport layer (HTL) comprised of p-type polytriarylamine (PTAA) polymer and vanadium(V) oxide (VOx). Devices with PTAA/VOx top HTL reach up to 20% efficiency and demonstrate negligible degradation after 4500 h of light soaking, whereas reference cells using PTAA/MoOx as HTL lose ∼50% of their initial efficiency under the same aging conditions. It was shown that the main origin of the enhanced device stability lies in the higher tolerance of VOx toward MAPbI3 compared to the MoOx interlayer, which tends to facilitate perovskite decomposition. Our results demonstrate that the application of PTAA/VOx hybrid HTL enables long-term operational stability of perovskite solar cells, thus bringing them closer to commercial applications.

Original languageEnglish
Pages (from-to)5563-5568
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume11
Issue number14
DOIs
Publication statusPublished - 16 Jul 2020
MoE publication typeA1 Journal article-refereed

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