Regioisomer effects of dibenzofuran-based bipolar host materials on yellow phosphorescent OLED device performance

2020 ◽  
Vol 44 (10) ◽  
pp. 3868-3873
Author(s):  
Nam Hee Cho ◽  
Jun Yeob Lee ◽  
Oh Young Kim ◽  
Seok-Ho Hwang
Keyword(s):  
Light Emitting Diodes ◽  
Cross Coupling ◽  
Organic Light Emitting Diodes ◽  
Device Performance ◽  
Coupling Reactions ◽  
Oled Device ◽  
Light Emitting ◽  
Cross Coupling Reactions ◽  
Organic Light ◽  
Host Materials

Four regioisomers were synthesized for use as bipolar host materials for phosphorescent organic light-emitting diodes (PhOLEDs) by classic cross-coupling reactions using cyanofluorene and fused dibenzofuran and were readily purified.

1,3,4-Oxadiazoles as luminescent materials for organic light emitting diodes via cross-coupling reactions

2016 ◽  
Vol 4 (37) ◽  
pp. 8596-8610 ◽  
Author(s):  
A. Paun ◽  
N. D. Hadade ◽  
C. C. Paraschivescu ◽  
M. Matache
Keyword(s):  
Light Emitting Diodes ◽  
Cross Coupling ◽  
Literature Survey ◽  
Organic Light Emitting Diodes ◽  
Luminescent Materials ◽  
Coupling Reactions ◽  
Light Emitting ◽  
Cross Coupling Reactions ◽  
Organic Light ◽  
The Cross

A literature survey of the cross-coupling reactions in the preparation of 1,3,4-oxadiazole compounds as useful materials for OLEDs is described.

Synthesis and green phosphorescent OLED device performance of cyanofluorene-linked phenylcarbazoles as host material

2018 ◽  
Vol 42 (7) ◽  
pp. 5059-5065 ◽  
Author(s):  
Shuxin Wang ◽  
Chil Won Lee ◽  
Jun Yeob Lee ◽  
Seok-Ho Hwang
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Host Material ◽  
Device Performance ◽  
Oled Device ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials

A series of three isomeric bipolar host materials for green phosphorescent organic light-emitting diodes (PhOLEDs) was synthesized from a combination of cyanofluorene and N-phenylcarbazole moieties.

New bipolar host materials for high performance of phosphorescent green organic light-emitting diodes

RSC Advances ◽  
2015 ◽  
Vol 5 (40) ◽  
pp. 31282-31291 ◽  
Author(s):  
Gyeong Heon Kim ◽  
Raju Lampande ◽  
Ji Hoon Kong ◽  
Jung Min Lee ◽  
Jang Hyuk Kwon ◽  
...  
Keyword(s):  
Optical Properties ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Oled Device ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials

New bipolar host materials with indenocarbazole and biphenyl pyrimidine moieties are successfully designed and synthesized. The host materials demonstrate excellent electro-optical properties and OLED device performances.

Highly efficient bipolar host materials towards solution-processable blue and green thermally activated delayed fluorescence organic light emitting diodes

2018 ◽  
Vol 6 (37) ◽  
pp. 10000-10009 ◽  
Author(s):  
Mallesham Godumala ◽  
Suna Choi ◽  
Seong Keun Kim ◽  
Si Woo Kim ◽  
Jang Hyuk Kwon ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Device Performance ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Host Materials ◽  
Solution Processable

Simple structured bipolar host materials boosted the device performance of solution processable blue and green thermally activated delayed fluorescence organic light emitting diodes.

High-efficiency red, green and blue phosphorescent homojunction organic light-emitting diodes based on bipolar host materials

2011 ◽  
Vol 12 (5) ◽  
pp. 843-850 ◽  
Author(s):  
Chao Cai ◽  
Shi-Jian Su ◽  
Takayuki Chiba ◽  
Hisahiro Sasabe ◽  
Yong-Jin Pu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials ◽  
Blue Phosphorescent

Pyridine-Incorporated Dihexylquaterthiophene: A Novel Blue Emitter for Organic Light Emitting Diodes (OLEDs)

2012 ◽  
Vol 65 (9) ◽  
pp. 1244 ◽  
Author(s):  
Prashant Sonar ◽  
Sonsoles Garcia Santamaria ◽  
Ting Ting Lin ◽  
Alan Sellinger ◽  
Henk Bolink
Keyword(s):  
Light Emitting Diodes ◽  
Blue Emission ◽  
Organic Light Emitting Diodes ◽  
High Yield ◽  
Device Performance ◽  
Host Matrix ◽  
Maximum Brightness ◽  
Light Emitting ◽  
Organic Light ◽  
Processing Techniques

The synthesis and characterisation of 2,5-bis(5′-hexyl-[2,2′-bithiophen]-5-yl)pyridine (Th4PY) and its use as a blue emitter in organic light emitting diodes (OLEDs) is reported. Th4PY was synthesised in high yield using a straightforward Suzuki coupling route with commercially available starting materials. As Th4PY is both soluble and has low molecular weight, blue OLEDs were fabricated using both spin-coating and vacuum deposition thin film processing techniques to study the effect of processing on device performance. OLED devices using a spin-coated layer consisting of 4′,4′′-tris(N-carbazolyl)triphenylamine (TCTA) and 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD) as a host matrix together with Th4PY as emitter exhibited highly efficient sky-blue emission with a low turn-on voltage of 3 V, a maximum brightness close to 15000 cd m–2 at 8 V, and a maximum luminous efficiency of 7.4 cd A–1 (6.3 lm W–1) with CIE coordinates of x = 0.212, y = 0.320. The device performance characteristics are compared using various matrices and processing techniques. The promising sky-blue OLED performance, solution processability, and ambient stability make Th4PY a promising blue emitter for application in OLEDs.

Sign in / Sign up

Export Citation Format

Share Document