▎ 摘　　要

NOVELTY - Formation of diode involves providing a graphene layer structure (5) on a substrate (10), providing a graphene layer structure (15) on a substrate (25), treating the structure (5) with an oxidant to form a graphene oxide surface (20), and aligning the structure (15) against the graphene oxide surface of the structure (5). USE - Formation of diode (claimed) used for electronic application e.g. wearable and flexible electronics, photovoltaic applications e.g. solar cell, and display application. ADVANTAGE - The method is easy and simple, and enables formation of diode with high quality and having excellent rectification ratio, without using harmful chemicals, and eliminates the graphene transfer processes which allows for easy scale up production. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the graphene/graphene oxide diode. Diode (1) Graphene layer structures (5,15) Substrates (10,25) Graphene oxide surface (20) Electrical contact (30) Electrical trace (35) Polymer coating (40)