NOVELTY - Composition comprises a light absorbing or light emitting compound M1 and at least one light absorbing or light emitting compound M2, where the compounds M1 and M2 are different from each other and both of them comprise at least one fluorine residue.    USE - The composition is useful: in an organic electronic device, preferably electroluminescent devices, organic field-effect transistors, organic thin film transistors, organic light emitting transistors, organic integrated circuits, organic solar cells, dye-sensitized organic solar cells, organic optical detectors, organic photoreceptors, organic field-quench devices, organic light-emitting electrochemical cells, organic laser diodes and organic plasmon-emitting devices, where the organic electronic device comprises a cathode, an anode and at least one organic layer comprising the composition; and for treating skin diseases and skin-associated diseases or changes including psoriasis, skin aging, skin wrinkling, skin rejuvenation, enlarged pores, cellulite, oily/greasy skin, folliculitis, actinic keratosis, precancerous actinic keratosis, skin lesions, sun-damaged and sun-stressed skin, crows feet, skin ulcer, acne, acne rosacea, scars caused by acne, acne bacteria, photomodulation of greasy/oily sebaceous glands and their surrounding tissues, jaundice, newborn jaundice, vitiligo, skin cancer, skin tumors, Crigler-Najjar syndrome, dermatitis, atopic dermatitis, diabetic skin ulcers.    ADVANTAGE - The composition: exhibits limited mobility of small molecules in solvents, thus it shows better film-forming properties; and shows an improved absorption profile, thus it is used in solar cells.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the composition, comprising (a) preparing a solution comprising the emitting compound M1 and the emitting compound M2 in a solvent L1, (b) preparing a solution comprising the organic host compound in a solvent L2, and (c) mixing the two solutions.    DESCRIPTION OF DRAWING(S) - The drawing 1 and 2 shows a schematic representation of the organic light emitting diode and a measurement setup, respectively (Drawing includes non-English language text).