Efficient planar organic semiconductors containing fused triphenylamine for solution processed small molecule organic solar cells

• New planar organic semiconductor comprising of fused triphenylamine donor and methylene malononitrile was synthesized.
• The fused TPA induce the enhanced the hole mobility due to more favorable intermolecular π–π packing interaction.
• The planar structure via fused TPA exhibited the better photovoltaic performances that the tilted structure with TPA.

A new and efficient push–pull organic semiconductor, DMM-TPA-Th2-MMN, with a planar fused triphenylamine (DMM-TPA) donor and a methylene malononitrile (MMN) acceptor was synthesized. The planar semiconductor exhibited better p-type semiconducting performance with a power conversion efficiency of 4.04% in solution-processed small-molecule organic solar cells than did the tilted TPA-Th2-MMN semiconductor, enhancing hole mobilities due to more favorable intermolecular π–π packing interactions.

A new and efficient push–pull organic semiconductor, DMM-TPA-Th2-MMN, with a planar fused triphenylamine (DMM-TPA) donor and a methylene malononitrile (MMN) acceptor was synthesized and characterized their application in solution processed small molecule organic solar cell.Figure optionsDownload as PowerPoint slide