Efficiency enhancement of fluorescent blue organic light-emitting diodes using doped hole transport and emissive layers

Nam Ho Kim; You-Hyun Kim; Ju-An Yoon; Seung Il Yoo; Kok Wai Cheah; Furong Zhu; Woo Young Kim

doi:10.3788/COL201614.043001

Chinese Optics Letters, Volume. 14, Issue 4, 043001(2016)

Efficiency enhancement of fluorescent blue organic light-emitting diodes using doped hole transport and emissive layers

Nam Ho Kim¹, You-Hyun Kim¹, Ju-An Yoon¹, Seung Il Yoo¹, Kok Wai Cheah³, Furong Zhu³, and Woo Young Kim^1,2、*

¹Department of Green Energy & Semiconductor Engineering, Hoseo University, 513-3, 2nd Engineering Building, 20, Hoeo-ro beon-gil, baebang-eup, Asan-si, Chungcheongnam-do 31499, South Korea

²Department of Engineering Physics, McMaster University, 1280 Main St W, Hamilton L8S 4L8, Canada

³Department of Physics, Hong Kong Baptist University, Hong Kong, Kowloon Tong, Waterloo Road 224, China

show less

Figures & Tables(7)

Fig. 1. Energy band diagrams of the blue OLED devices A, B, C, and D.

Download full size

View in Article

Fig. 2. (A) Normalized and (B) original absorption spectrum of BCzVBi with PL spectra of NPB and Bphen.

Download full size

View in Article

Fig. 3. Plots of (A) current density versus voltage and (B) luminous efficiency versus current density of BOLED devices.

Download full size

View in Article

Fig. 4. EL spectra of blue OLED devices at 6 V.

Download full size

View in Article

Fig. 5. (A) Transit time by the photocurrent of BCzVBi at 35 V, and (B) the field dependent mobility of BCzVBi.

Download full size

View in Article

Table 1. Layer Structure of Blue OLED Devices (Thickness Unit=Å)

View table

View in Article

Table 1. Layer Structure of Blue OLED Devices (Thickness Unit=Å)

Device		HTL	EML	ETL		EIL	metal
A	NPB (700)		ADN:BCzVBi-7% (300)		Bphen (300)	Liq (20)	Al (1200)
B	NPB (600)	NPB:BCzVBi-7% (100)	ADN:BCzVBi-7% (300)		Bphen (300)	Liq (20)	Al (1200)
C	NPB (700)		ADN:BCzVBi-7% (300)	Bphen:BCzVBi-7% (100)	Bphen (200)	Liq (20)	Al (1200)
D	NPB (600)	NPB:BCzVBi-7% (100)	ADN:BCzVBi-7% (300)	Bphen:BCzVBi-7% (100)	Bphen (200)	Liq (20)	Al (1200)

Table 2. Calculated Field-Dependent Electron Mobility of BCzVBi
View table
View in Article
Table 2. Calculated Field-Dependent Electron Mobility of BCzVBi
Voltage (V) Time (μs) Mobility ( ${cm}^{2} / Vs$ )
25 31.40 $6.24 \times 10^{- 6}$
30 20.40 $8.00 \times 10^{- 6}$
35 13.70 $1.02 \times 10^{- 5}$
40 9.79 $1.25 \times 10^{- 5}$
45 8.02 $1.36 \times 10^{- 5}$
50 5.63 $1.74 \times 10^{- 5}$
Hole Mobility of BCzVBi [11] $1.0 \times 10^{- 3}$

Tools

Get Citation

Copy Citation Text

Nam Ho Kim, You-Hyun Kim, Ju-An Yoon, Seung Il Yoo, Kok Wai Cheah, Furong Zhu, Woo Young Kim. Efficiency enhancement of fluorescent blue organic light-emitting diodes using doped hole transport and emissive layers[J]. Chinese Optics Letters, 2016, 14(4): 043001

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites