Inkjet ink composition

Abstract

This invention provides an inkjet ink composition that exhibits excellent coatability for the light-emitting layer of the printed substrate in the formation of the electron transport layer using inkjet printing, and is less likely to damage the light-emitting layer. The inkjet ink composition comprises metal oxide nanoparticles composed of an electron transport material and a dispersion medium. The dispersion medium has a Hansen solubility parameter with a polarity term dP of 7.5 or less and a hydrogen bonding term dH of 15 or less, has 6 to 10 carbon atoms per molecule, includes a hydrocarbon group and a functional group bonded to the hydrocarbon group, and has a maximum carbon chain length of 5 to 10 atoms starting from the carbon atom adjacent to the functional group.

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