title: Efficient non-doped phosphorescent orange, blue and white organic light-emitting devices.
abstract: Efficient phosphorescent orange, blue and white organic light-emitting devices (OLEDs) with non-doped emissive layers were successfully fabricated. Conventional blue phosphorescent emitters bis [4,6-di-fluorophenyl]-pyridinato-N,C(2')] picolinate (Firpic) and Bis(2,4-difluorophenylpyridinato) (Fir6) were adopted to fabricate non-doped blue OLEDs, which exhibited maximum current efficiency of 7.6 and 4.6 cd/A for Firpic and Fir6 based devices, respectively. Non-doped orange OLED was fabricated utilizing the newly reported phosphorescent material iridium (III) (pbi)₂Ir(biq), of which manifested maximum current and power efficiency of 8.2 cd/A and 7.8 lm/W. The non-doped white OLEDs were achieved by simply combining Firpic or Fir6 with a 2-nm (pbi)₂Ir(biq). The maximum current and power efficiency of the Firpic and (pbi)₂Ir(biq) based white OLED were 14.8 cd/A and 17.9 lm/W.
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun. 130012, China.
authors.forename: Yongming
authors.initials: Y
authors.lastname: Yin
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun. 130012, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Yu
authors.affiliation: College of Chemistry, Northeast Normal University, Changchun, Jilin. 130024, P. R. China.
authors.forename: Hongtao
authors.initials: H
authors.lastname: Cao
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun. 130012, China.
authors.forename: Letian
authors.initials: L
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Northeast Normal University, Changchun, Jilin. 130024, P. R. China.
authors.forename: Haizhu
authors.initials: H
authors.lastname: Sun
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun. 130012, China.
authors.forename: Wenfa
authors.initials: W
authors.lastname: Xie