Pyridine-incorporated dihexylquaterthiophene : a novel blue emitter for organic light emitting diodes (OLEDs)
Sonar, Prashant, Santamaria, Sonsoles Garcia, Lin, Ting Ting, Sellinger, Alan, & Bolink, Henk (2012) Pyridine-incorporated dihexylquaterthiophene : a novel blue emitter for organic light emitting diodes (OLEDs). Australian Journal of Chemistry, 65(9), pp. 1244-1251.
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 3V, a maximum brightness close to 15000cdm-2 at 8V, and a maximum luminous efficiency of 7.4cdA -1 (6.3lmW -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.
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|Item Type:||Journal Article|
|Keywords:||Ambient stability, Blue emitter, Blue OLEDs, CIE coordinates, Device performance, High yield, Host matrices, Low molecular weight, Luminous efficiency, Organic light emitting diodes(OLEDs), Processability, Processing technique, Suzuki couplings, Thin-film processing, Triphenyl amines, Luminance, Pyridine, Synthesis (chemical), Organic light emitting diodes (OLED)|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2012 CSIRO|
|Deposited On:||08 Oct 2014 23:46|
|Last Modified:||09 Oct 2014 22:26|
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