Patent ID: 7422799
Filing Date: 2008-09-09
Classification: H01L,Y10S

Abstract:
1. An organic electroluminescent device comprising: a pair of electrodes; an organic compound layer between the pair of electrodes, the organic compound layer comprising in order: a hole transport layer; a light emitting layer; and an electron transport layer, wherein the hole transport layer comprises: a hole transport material; and an electrically inactive organic compound capable of being subjected to dry film formation, the electrically inactive organic compound having an energy difference Eg between a highest occupied molecular orbital and a lowest unoccupied molecular orbital of 4.0 eV or more; wherein the electrically inactive organic compound is a compound represented by formula (1): wherein Ar represents a group represented by formula (2); L represents a trivalent or tetravalent benzene skeleton; and m represents an integer of 3 or 4: wherein R