▎ 摘　　要

NOVELTY - A carbon material diode comprises an electron-containing carbon nanotube layer, an electron-containing graphene oxide layer, a hole-containing graphene oxide layer and a hole-containing carbon nanotube layer. USE - Carbon material diode. ADVANTAGE - The carbon material diode has high rectification ratio and operating current. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of carbon material diode, which involves using an electron-containing carbon nanotube dispersion, an electron-containing graphene oxide dispersion, a hole-containing graphene oxide dispersion, a hole-containing carbon nanotube dispersion, and a mixed cellulose filter.