LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE USING IT, AND ELECTRIC APPARATUS USING THE DEVICE

摘要

PROBLEM TO BE SOLVED: To reduce a driving voltage and to improve color purity in a light-emitting element composed by employing a light-emitting layer containing a host material added with a small amount of a guest material; and in particular to reduce a driving voltage and to improve color purity in a light-emitting element added with a red light-emitting material as a guest material. SOLUTION: The light-emitting layer is formed that includes: a first host material, which is an organic compound having a hole transporting property; a second host material, which is an organic compound having a larger dipole moment than that of the first host material; and a guest material having an electron-withdrawing group. COPYRIGHT: (C)2005,JPO&NCIPI