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Proceedings Paper

Flexo printed sol-gel derived vanadium oxide films as an interfacial hole-transporting layer for organic solar cells
Author(s): Terho Kololuoma; Jiangping Lu; Salima Alem; Neil Graddage; Raluca Movileanu; Simona Moisa; Ye Tao
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Paper 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.

Paper Details

Date Published: 13 March 2015
PDF: 9 pages
Proc. SPIE 9364, Oxide-based Materials and Devices VI, 93640K (13 March 2015); doi: 10.1117/12.2079270
Show Author Affiliations
Terho Kololuoma, National Research Council of Canada (Canada)
VTT Technical Research Ctr. of Finland (Finland)
Jiangping Lu, National Research Council of Canada (Canada)
Salima Alem, National Research Council of Canada (Canada)
Neil Graddage, National Research Council of Canada (Canada)
Raluca Movileanu, National Research Council of Canada (Canada)
Simona Moisa, National Research Council of Canada (Canada)
Ye Tao, National Research Council of Canada (Canada)

Published in SPIE Proceedings Vol. 9364:
Oxide-based Materials and Devices VI
Ferechteh H. Teherani; David C. Look; David J. Rogers, Editor(s)

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