containing CuInGaSe or CuInGaSeS nano-crystals with grain sizes of less than 200 nm, a hydrophobic or anhydrous organic solvent and a dispersant, and characterized by not requiring toxic hydrazine or triethylamine as a solvent

• Main Author: ZHONG, RUN-WEN
• Format: Patent
• Language: Chinese; English
• Published: 16.05.2012
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; USE OF MATERIALS THEREFOR; WOODSTAINS

The present invention provides an ink with light-absorbable nano-grains and preparation method thereof. The ink contains light-absorbable grains, a solvent and a dispersant. The light-absorbable nano-grains are the nano-crystals of CuInGaSe (CIGS) or CuInGaSeS (CIGSS) and have grain sizes of less than 200 nm. The solvent is a hydrophobic or anhydrous organic solvent with a boiling point of less than 130 DEG C. The dispersant enables the nano-grains to be dispersed in the solvent. In an anaerobic and anhydrous environment, the light-absorbable powder is mixed with the solvent and the dispersant to carry out a grind, thereby an ink having powder body with grain size less than 200 nm is obtained. This invention is characterized by not requiring toxic hydrazine or triethylamine as a solvent, saving preparation time, preventing powder from oxidation and pollution, having the advantages of not containing salts and other by-products, thereby promoting the efficiency of successively forming a light-absorbable element