Trilayer metal electrode as an anode in red phosphorescent organic light-emitting diodes

• Published in: Journal of the Korean Physical Society Vol. 67; no. 3; pp. 568 - 573
• Main Authors: Lee, Ho Won, Lee, Jae Woo, Lee, Song Eun, Kim, Young Kwan, Zhang, Xue, Park, Jaehoon, Choi, Yun Seok
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Physical Society 01-08-2015; 한국물리학회
• Subjects: Mathematical and Computational Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Theoretical; 물리학; Phosphorescence; Light-emitting diode; Organic semiconductor; Metal electrode
• ISSN: 0374-4884; 1976-8524
• DOI: 10.3938/jkps.67.568

In this study, we fabricated red phosphorescent organic light-emitting diodes (PhOLEDs) on rigid glass and flexible plastic substrates by using a trilayer-structured metal anode (Ni/interlayer metal/Ni) and analyzed the optical and the electrical characteristics of these devices. The thickness of the electron transporting layer in red PhOLED with a trilayer metal anode was optimized by comparing its characteristics with those of the device with an indium-tin-oxide (ITO) anode. The performance of the red PhOLED was also analyzed according to interlayer metals (Al, Cu, and Ag) in the trilayer structure. Consequently, the trilayer metal electrode with the structure of Ni/Ag/Ni is suggested as an alternative to an ITO anode for PhOLEDs.