title: High efficient white organic light-emitting diodes using BCzVBi as blue fluorescent dopant.
abstract: Efficiency improvement and color optimization of white organic light-emitting diodes (WOLEDs) were achieved via employing blue host DPVBi doped with blue fluorescent, BCzVBi. The structure of high efficient WOLED device was composed of ITO/NPB/DPVBi:BCzVBi-6%/MADN:DCM2-0.5%/Bphen/Liq/Al. WOLED doped by blue fluorescent BCzVBi exhibits 6.19 cd/A of luminous efficiency and 15400 cd/m2 of maximum luminescence. It also performs 480 cd/m2 of luminance at 5.7 V and 15400 cd/m2 at 12.9 V with CIE(x,y) coordinates of (0.33, 0.32) and (0.32, 0.32), respectively. Hole carrier and energy transfer from DPVBi to BCzVBi are proposed to explain the observed phenomena.
authors.affiliation: School of Display Engineering, Hoseo University, 29-1 Sechul-ri, Beabang-myun, Asan, Chungnam 336-795, South Korea.
authors.forename: You-Hyun
authors.initials: YH
authors.lastname: Kim
authors.forename: Su-Hwan
authors.initials: SH
authors.lastname: Lee
authors.forename: Hyun-Soo
authors.initials: HS
authors.lastname: Yoon
authors.forename: Jae-Yoon
authors.initials: JY
authors.lastname: Choi
authors.forename: Sung Sik
authors.initials: SS
authors.lastname: Shin
authors.forename: Soo Joh
authors.initials: SJ
authors.lastname: Chae
authors.forename: Ji-Hoon
authors.initials: JH
authors.lastname: Seo
authors.forename: Ji-Hyun
authors.initials: JH
authors.lastname: Seo
authors.forename: Young-Kwan
authors.initials: YK
authors.lastname: Kim
authors.forename: Woo-Young
authors.initials: WY
authors.lastname: Kim