LIGHT-EMITTING DEVICE

摘要

PROBLEM TO BE SOLVED: To align light-emitting intensity of EL elements of different emission colors and enhance emission intensity of the EL elements in a pixel part of a light-emitting device. SOLUTION: Emission intensity of EL elements formed in plural can be aligned by combining EL elements having EL layers including triplet compounds and EL elements having EL layers including singlet compounds at a pixel part. Further, EL elements of higher emission intensity can be formed by making hole transport layers in lamination structure.