▎ 摘　　要

NOVELTY - Preparation of two-dimensional conjugated polymer heterojunction involves using a chemical vapor deposition method, and preparing an aromatic conjugated monomer (I) by an interfacial copolymerization reaction on the surface of a substrate. USE - Preparation of two-dimensional conjugated polymer heterojunction used for organic optoelectronic device, electronic devices, optoelectronic components, photovoltaic devices, solar cells, energy storage devices, gas storage devices and separation and organic field effect transistors e.g. vertical organic field effect transistor and polymer film (all claimed). ADVANTAGE - The method is simple and economical, enables preparation of two-dimensional conjugated polymer heterojunction with excellent universality and productivity even at low temperature and normal pressure. DETAILED DESCRIPTION - Preparation of two-dimensional conjugated polymer heterojunction involves using a chemical vapor deposition method, and preparing an aromatic conjugated monomer of formula (I) by interfacial copolymerization reaction on the surface of a substrate. m = 3-8; and R = reactive group chosen from F, Cl, Br, I, or H. An INDEPENDENT CLAIM is included for the two-dimensional conjugated polymer heterojunction, which has an area of 1 cm2 or more, preferably 1.5 cm2 or more, a thickness of 0.1-20 nm, preferably 0.5-1 nm, and containing a repeating unit of formulae (e)-(h). A = group of formula (a1), preferably of formulae (1a) or (2a); B' = group of formula (a2), preferably of formula (3a) or (4a); C' = group of formula (a3), preferably of formula (5a) or (6a); D = group of formula (a4), preferably of formula (7a) or (8a); and M = iron, copper, cobalt, magnesium, zinc, or nickel.