Abstract: A vapor transferring apparatus for purification of organic functional materials is disclosed, which comprises a furnace having at least a furnace gate, furnace walls, and a heater; wherein the furnace gate is mounted on the furnace walls of the heater; at least a glove box having at least a box gate, box walls, and at least one glove; wherein the box gate is mounted on the box walls of the glove box; and a shifting chamber having at least a valve and at least a surrounding wall, locating between and connecting with the furnace gate of the furnace or the box gate of the glove box; wherein the valve is mounted on the surrounding wall of the shifting chamber; wherein the heater, the glove box, and the shifting chamber are hermetical and hollow.

Abstract: Coumarin derivatives are used with an electroluminescent (EL) device in accordance with the present invention. The coumarin derivatives have the representative formula (1): wherein the R1 is a branched alkyl group of 3 to 10 carbon atoms.

Abstract: A vapor transferring apparatus for purification of organic functional materials is disclosed, which comprises a furnace having at least a furnace gate, furnace walls, and a heater; wherein said furnace gate is mounted on said furnace walls of said heater; at least a glove box having at least a box gate, box walls, and at least one glove; wherein said box gate is mounted on said box walls of said glove box; and a shifting chamber having at least a valve and at least a surrounding wall, locating between and connecting with said furnace gate of said furnace or said box gate of said glove box; wherein said valve is mounted on said surrounding wall of said shifting chamber; wherein the heater, the glove box, and the shifting chamber are hermetical and hollow.