Combining emissions of hole- and electron-transporting layers simultaneously for simple blue and white organic light-emitting diodes with superior device performance

2018 ◽  
Vol 6 (7) ◽  
pp. 1853-1862 ◽  
Author(s):  
Yanqin Miao ◽  
Kexiang Wang ◽  
Long Gao ◽  
Bo Zhao ◽  
Zhongqiang Wang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Device Performance ◽  
Light Emitting ◽  
White Emission ◽  
Organic Light ◽  
White Oled ◽  
Luminance Range

Combining emissions of hole- and electron-transporting layers simultaneously, a simple four-color hybrid white OLED realizes good white emission with a maximum CRI of 93–94 over a wide luminance range of 83.68–17 050 cd m−2, and also achieves a high EQE of 18.44%.

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.

High-Performance Solution Processed Red Hyperfluorescent OLEDs Based on Cibalackrot

2022 ◽  
Author(s):  
Nicholle R. Wallwork ◽  
Masashi Mamada ◽  
Atul Shukla ◽  
Sarah K. M. McGregor ◽  
Chihaya Adachi ◽  
...  
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Device Performance ◽  
Solution Processed ◽  
Light Emitting ◽  
Organic Light

Hyperfluorescent organic light-emitting diodes (OLEDs) has allowed remarkable device performances to be achieved using fluorescent emitters. Superior device performance has been realised using thermally evaporated emissive layers. However, for future...

Tetraphenylpyrazine decorated 1,3-di(9H-carbazol-9-yl)benzene (mCP): a new AIE-active host with enhanced performance in organic light-emitting diodes

2019 ◽  
Vol 7 (36) ◽  
pp. 11160-11166
Author(s):  
Jiali Guo ◽  
Lingxiang Pan ◽  
Bo Song ◽  
Jiabao Gu ◽  
Jiajie Zeng ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Device Performance ◽  
Light Emitting ◽  
Organic Light

Decorating a conventional mCP host with a tetraphenylpyrazine moiety generates a new AIE-active host, from which better device performance was realized.

Bandgap engineering in Alq3- and NPB-based organic light-emitting diodes for efficient green, blue and white emission

2007 ◽  
Vol 51 (11-12) ◽  
pp. 1618-1623 ◽  
Author(s):  
Y. Divayana ◽  
X.W. Sun ◽  
B.J. Chen ◽  
G.Q. Lo ◽  
K.R. Sarma ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Bandgap Engineering ◽  
Light Emitting ◽  
White Emission ◽  
Organic Light

scholarly journals White emission from organic light emitting diodes based on energy down-convertion mechanisms

2003 ◽  
Vol 139 (3) ◽  
pp. 675-677 ◽  
Author(s):  
Marco Mazzeo ◽  
Dario Pisignano ◽  
Laura Favaretto ◽  
Giovanna Sotgiu ◽  
Giovanna Barbarella ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
White Emission ◽  
Organic Light

High-performance organic light-emitting diodes with natural white emission based on thermally activated delayed fluorescence emitters

2020 ◽  
Vol 8 (30) ◽  
pp. 10431-10437 ◽  
Author(s):  
Wei Luo ◽  
Tong-Tong Wang ◽  
Xing Chen ◽  
Kai-Ning Tong ◽  
Wei He ◽  
...  
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
White Emission ◽  
Thermally Activated ◽  
Organic Light

WOLEDs with stable natural white emission based on all-TADF emitters.

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