Towards optimization of device performance in organic light emitting diodes and organic photovoltaics via architecture modification

2013 ◽  
Author(s):  
Ping-kuen, Daniel Tsang
Keyword(s):  
Organic Photovoltaics ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Device Performance ◽  
Light Emitting ◽  
Organic Light

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.

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