ORGANIC ELECTROLUMINESCENCE DEVICE INCLUDING REDOX-DOPED ELECTRON TRANSFER LAYER AND AUXILIARY ELECTRON TRANSFER LAYER

摘要

PROBLEM TO BE SOLVED: To provide an organic light emitting diode having improved efficiency, operating at a low voltage, and having a long lifetime.;SOLUTION: The organic light emitting diode (OLED) includes: an ETL laminate composed of at least two layers in which a first electron transfer layer on a light emitting layer side contains a first electron transfer matrix compound represented by a specific formula and a second electron transfer layer on a cathode side contains a second electron transfer matrix compound; and a redox n dopant. The device includes the OLED.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT