Patent ID: 10439004

Abstract:
The present invention mainly discloses a high-efficiency OLED device, comprising: an anode substrate, a hole transport layer (HTL), at least one emission layer (EML), an electron transport layer (ELT), and a cathode layer. In this high-efficiency OLED, LUMO level of the HTL, LUMO level of the EML and LUMO level of the ETL together form a step-like LUMO level, and HOMO level of the HTL, HOMO level of the EML and HOMO level of the ETL also constitute one step-like HOMO level. On the other hand, the electron mobility of the ETL is greater than the EML's electron mobility by at least 2 orders in this high-efficiency OLED. Moreover, a variety of experimental data have proved that, a specific OLED would certainly exhibits outstanding luminance performance as long as the specific OLED is made based on the above-mentioned physical characteristics limitations for the ETL, the EML and the HTL.