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.

View at publisher


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.

Impact and interest:

4 citations in Scopus
Search Google Scholar™
4 citations in Web of Science®

Citation counts are sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

ID Code: 75245
Item Type: Journal Article
Refereed: Yes
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)
DOI: 10.1071/CH12171
ISSN: 0004-9425
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

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page