▎ 摘　　要

NOVELTY - The perovskite thin film has carbon quantum dots (132) which are surrounded by a perovskite compound (131) and organic ligands, where the carbon quantum dot is attached to the crystal surface of the crystal compound. The organic ligide has flowability at a temperature of -25 to 300° C. Carbon quantum dots transport the organic ligides into the thin film, and have an average particle diameter of 1 nm to 100 μ m. The carbon quantum data has a D band and a G band. The quantum dots include graphene quantum dots having a graphite crystal structure, carbon quantum diodes having a diamond crystal structure and an amorphous structure, and a composite structure. The film has a thickness of 10 nm to 200 nm. An electrode is formed on a substrate, and an electron transport layer is provided on the electrode. USE - Perovskite thin film used for perovskite optoelectronic device (claimed) e.g. photodetector used in image sensing, communication, environmental monitoring, and chemical/biological detection applications. Can also be used in solar cell and LED. ADVANTAGE - The carbon quantum dots surrounded by organic ligands are deeply embedded in the perovskite thin film to remove defects between crystals of the crystal of perovskite compound through the flowability of the organic ligand during the heat treatment process. The noise is removed, the non-detection performance is increased, and the light detection speed is significantly increased by induction. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a manufacturing method of a perovskite thin film. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view showing a perovskite thin film. 131Perovskite compound 132Carbon quantum dot