Abstract: Provided is an oxime ester phenylcarbazole compound useful as a photoinitiator for photocrosslinking. Specifically, the carbon atom forming a double bond with the nitrogen atom in the oxime ester moiety of the oxime ester phenylcarbazole compound is bonded to the phenylcarbazole group and is directly bonded to a (C1-C20)alkyl or (C6-C20)aryl group. Also provided is a photopolymerizable composition including the oxime ester phenylcarbazole compound. The oxime ester phenylcarbazole compound and the photopolymerizable composition have improved solubilities, are highly photosensitive, and exhibit excellent physical properties in terms of residual film ratio, pattern stability, resist adhesiveness. Due to these advantages, the oxime ester phenylcarbazole compound and the photopolymerizable composition are suitable for use in black resists, color resists, overcoats, column spacers, and organic insulating films of LCDs.

Abstract: Provided is a photoinitiator represented by Formula 1: The photoinitiator is suitable for photocrosslinking. Further provided is a photosensitive resin composition including the photoinitiator. The photoinitiator and the photosensitive resin composition have improved solubility and high sensitivity. The photosensitive resin composition is suitable for use in the production of black resists, color resists, overcoats, column spacers, and organic insulating films for LCDs.