NOVELTY - A discharge liquid comprises quantum dot of fine particle and dispersion medium containing dodecane, tetradecane, cyclohexylbenzene, decalin, butoxy ethanol, ethyl octanoate, 4-methyl-1,3-dioxolane-2-one, bis(2-butoxyethyl)ether, diethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, dipropyleneglycol methyl ether acetate, triethylene glycol butyl methyl ether and/or 1,3-butylene glycol diacetate which disperses quantum dot.    USE - Discharge liquid for forming thin film, and light emitting element used for image display apparatus and electronic device (claimed) e.g. notebook type personal computer, mobile phone, digital still camera, video tape recorder of TV, video camera and viewfinder type, monitor direct-view type, laptop type personal computer, car navigation apparatus, pager, electronic notebook, electronic dictionary, calculator, electronic game machine device, word processor, workstation, video telephone, TV monitor for crime prevention, electronic binoculars, point of sale (POS) terminal, touch panel apparatus (e.g. cash dispenser of financial institution or automatic ticket vending machine), projection-type display devices, medical equipment (e.g. electronic thermometer, blood pressure meter, blood glucose meter, electrocardio display device, ultrasonic diagnosing device and endoscope display device), fish finder, measurement apparatuses, measuring instruments (e.g. vehicle, aircraft and measuring instruments of ship), flight simulator, monitors and projectors. Can also be used for solar cell and illuminating device.    ADVANTAGE - The discharge liquid is excellent in durability, prevents production of irregular color, and displays wide outstanding image of color reproduction region.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) discharge liquid set;    (2) thin film pattern formation;    (3) thin film;    (4) light emitting element;    (5) image display apparatus; and    (6) electronic device.