ORGANIC ELECTROLUMINESCENCE DEVICE, ELECTRONIC APPARATUS, AND METHOD FOR FABRICATING ORGANIC ELECTROLUMINESCENCE DEVICE

• Main Authors: MITANI, Masato, MIZUTANI, Sayaka, TAKAHASHI, Ryota, AOYAMA, Yoshinori, NISHIMURA, Kazuki
• Format: Patent
• Language: English
• Published: 09.02.2023

An organic electroluminescence device comprising: a cathode; an anode; an emitting layer disposed between the cathode and the anode; and a first layer disposed between the emitting layer and the cathode, wherein the emitting layer comprises a host compound, the first layer comprises a first compound and a second compound, and the three compounds are in a relationship satisfying the following Conditions 1 and 2:(Condition 1)the electron affinity AfH of the host compound and the electron affinity AfETA of the first compound satisfy the following expressions (1-1) and (1-2):AfH<AfETA  (1-1)|AfH−AfETA|≤0.10  (1-2)(Condition 2)the electron affinity AfH of the host compound and the electron affinity AfETB of the second compound satisfy the following expressions (2-1) and (2-2):AfH>AfETB  (2-1)|AfH−AfETB|≤0.10  (2-2).