Patent ID: 7635946
Filing Date: 2009-12-22
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: a hole transport layer; a light emitting layer; a block layer; and an electron transport layer, wherein the block layer comprises: an electron 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 wherein the electrically inactive organic compound has a triplet excited state having a lowest energy level T1 of 2.7 eV or more.