Flexo printed sol-gel derived vanadium oxide films as an interfacial hole-transporting layer for organic solar cells

Terho Kololuoma, Salima Alem, Jiangping Lu, Neil Graddage, Ye Tao

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

3 Citations (Scopus)

Abstract

In this paper we report on the synthesis and development of vanadium oxide precursor flexographic ink for the printing of hole-transporting layers in organic solar cells. For the synthesis of vanadium oxide inks, a sol-gel methodology was utilized. By modifying the vanadium alkoxide precursor with a right type of coordinating ligands a stable and flexoprintable ink has been successfully developed. Flexo-printing afforded smooth and uniform vanadium oxide sol-gel films on top of PCDTBT:PC70BM films. The conversion of the synthesized sol-gel film into a corresponding vanadium oxide layer was followed by DSC/TGA and XPS analyses. The inks were used for the fabrication of inverted organic solar cells by flexo-printing. Power conversion efficiencies ranging between 3.5 % and 4.5 % were achieved, which are slightly lower than the reference cells using vacuum-deposited MoO3 as the hole-transporting layers.
Original languageEnglish
Title of host publicationOxide-based Materials and Devices VI
PublisherInternational Society for Optics and Photonics SPIE
DOIs
Publication statusPublished - 2015
MoE publication typeA4 Article in a conference publication
EventSPIE Photonics West 2015 - San Fracisco, United States
Duration: 7 Feb 201512 Feb 2015

Publication series

SeriesProceedings of SPIE
Volume9364
ISSN0277-786X

Conference

ConferenceSPIE Photonics West 2015
CountryUnited States
CitySan Fracisco
Period7/02/1512/02/15

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Kololuoma, T., Alem, S., Lu, J., Graddage, N., & Tao, Y. (2015). Flexo printed sol-gel derived vanadium oxide films as an interfacial hole-transporting layer for organic solar cells. In Oxide-based Materials and Devices VI [93640K] International Society for Optics and Photonics SPIE. Proceedings of SPIE, Vol.. 9364 https://doi.org/10.1117/12.2079270