Hwan-Koo Lee

Multi-layered electrophotographic positively charged organic photoconductor and manufacturing method thereof

Charge transport compound, elctrophotographic organophotoreceptor comprising the same, and electrographic imaging apparatus and method

Electrophotographic photoreceptor containing naphthalenetetracarboxylic acid diimide derivatives and electrophotographic imaging apparatus employing the same

Naphthalenetetracarboxylic acid diimide derivatives and electrophotographic photoconductive material having the same

Electrophotographic photoreceptor containing naphthalenetetracarboxylic acid diimide derivatives as electron transport materials in charge generating layer and the electrophotographic imaging apparatus using the photoreceptor

Naphthalene tetracarboxylic diimide based polymer, electrophotographic photoreceptor containing the same, and electrophotographic cartridge, electrophotographic drum and electrophotographic image forming apparatus comprising the electrophotographic photoreceptor

Phenylazomethylene-cyclohexadienone derivatives comprising electron withdrawing group and electrophotographic photoreceptor comprising the derivatives

Electrophotographic photoreceptor for blue-violet exposure light source and electrophotographic imaging apparatus employing the photoreceptor

Electrophotographic photoreceptor having both excellent mechanical strength and electrical properties and electrophotographic imaging apparatus using the same

Double-layered positively-charged organic photoreceptor