High efficient white organic light-emitting diodes using BCzVBi as blue fluorescent dopant.
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.
Kim
You-Hyun
YH
School of Display Engineering, Hoseo University, 29-1 Sechul-ri, Beabang-myun, Asan, Chungnam 336-795, South Korea.
Lee
Su-Hwan
SH
Yoon
Hyun-Soo
HS
Choi
Jae-Yoon
JY
Shin
Sung Sik
SS
Chae
Soo Joh
SJ
Seo
Ji-Hoon
JH
Seo
Ji-Hyun
JH
Kim
Young-Kwan
YK
Kim
Woo-Young
WY