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Research Article

Utilizing Electroplex Emission to Achieve External Quantum Efficiency up to 18.1% in Nondoped Blue OLED

Table 2

EL performances of 3Cz-Ph-CN (A/D/G), 3Cz-mPh-CN (B/E/H), and 3Ph-Cz-CN (C/F/I)a.

Device (nm) (V) (cd m-2) (lm W-1) (cd A-1) (%)CIEb ()

A4394.253041.372.242.450.16, 0.10
B4216.830570.451.091.140.16, 0.12
C414 (506)2.8665124.923.818.10.17, 0.16
D4343.845181.321.762.940.16, 0.06
E4295.411530.190.500.580.19, 0.12
F4203.232091.061.151.960.19, 0.12
G5623.44615459.780.626.10.49, 0.50
H5643.84640156.677.225.10.49, 0.50
I5622.84795284.584.627.40.49, 0.51
Jc5642.84843452.057.418.20.50, 0.50 [31]
K5623.24756741.750.615.70.49, 0.51 [31]
L2.864.524.50.51, 0.49 [44]
M2.462.125.00.49, 0.49 [23]

aDevice configuration: ITO/MoO3 (10 nm)/X/LiF (1 nm)/Al. For devices A-C: X = NPB (60 nm)/mCP (15 nm)/emitter (30 nm)/TPBi (30 nm). For devices D-F: X = emitter (60 nm)/TPBi (30 nm). For devices G-I: X = NPB (60 nm)/mCP (10 nm)/emitter:PO-01 (20 nm, 10 wt%)/Bphen (40 nm). bAbbreviations:  = turn-on voltage at 1 cd m-2;  = maximum luminance; , , and  = maximum power, current, and external quantum efficiencies, respectively; CIE = Commission International de l’Éclairage coordinates. cDevices J-M: literature results for comparison.