METHOD FOR REFINING OF ORGANIC ELECTROLUMINESCENT MATERIAL USING THE MIXED ADSORBENT

摘要

The present invention relates to a method for refining an organic electroluminescent material using a mixed adsorbent. The method for refining an organic electroluminescent material reduces the amount of activated carbon used, by performing a vacuum deposition process of an organic electroluminescent layer in a process of manufacturing an organic electroluminescent display device, dissolving the organic electroluminescent material collected by a deposition unit with an organic solvent, firstly adsorbing polar impurities with a polar adsorbent, secondarily removing impurities with activated carbon, and crystalizing it. The present invention improves separation efficiency and filtering property and allows a final product to be reused as an organic electroluminescent material for panel deposition, by adsorbing impurities successively and selectively with a mixed adsorbent.