title: Optimization of Semitransparent Anode Electrode for Flexible Green and Red Phosphorescent Organic Light-Emitting Diodes.
abstract: In this paper, we demonstrated thin film semitransparent anode electrode using Ni/Ag/Ni (3/6/3 nm) on green and red phosphorescent OLEDs, which have basically high efficiency and good optical characteristics. Moreover, we applied this semitransparent anode on flexible green and red phosphorescent OLEDs, which were then optimized for possible applications on flexible substrates. First, we studied optimization using various conditions of Ni/Ag/Ni electrodes via transmittance and sheet resistance. We then fabricated the devices on a glass substrate with ITO or Ni/Ag/Ni electrodes as well as on a flexible substrate with a Ni/Ag/Ni electrode for green and red phosphorescent OLEDs. Consequently, we could be proposed that the potential of our semitransparent anode electrode is demonstrated. Green phosphorescent OLEDs characteristics using ITO or Ni/Ag/Ni anode electrodes were coincided and those of the red phosphorescent OLEDs were improved by semitransparent electrodes at 10,000 cd/m2 criterion. Therefore, this research suggests for additional studies to be conducted on flexible and high-performance phosphorescent OLED displays and light applications for ITO-free processes.
authors.forename: Ho Won
authors.initials: HW
authors.lastname: Lee
authors.forename: Jaehoon
authors.initials: J
authors.lastname: Park
authors.forename: Hyung Jin
authors.initials: HJ
authors.lastname: Yang
authors.forename: Song Eun
authors.initials: SE
authors.lastname: Lee
authors.forename: Seok Jae
authors.initials: SJ
authors.lastname: Lee
authors.forename: Ja Ryong
authors.initials: JR
authors.lastname: Koo
authors.forename: Hye Jeong
authors.initials: HJ
authors.lastname: Kim
authors.forename: Seung Soo
authors.initials: SS
authors.lastname: Yoon
authors.forename: Young Kwan
authors.initials: YK
authors.lastname: Kim