Wet-processable and low temperature curable hole injection polymer was demonstrated. It has good solubility to aromatic solvents and its thin film after the curing with initiator showed enough solvent resistance. It was confirmed to have the potential as Hole Injection Layer (HIL) by applying to blue fluorescenceOLEDs. Author Keywords hole injection polymer; wet-processable; low temperature curable; flexible organic light emitting diodes P-167 / K.-i. Ishitsuka SID 2018 DIGEST • 1789 ISSN 0097-996X/18/4703-1789-$1.00