Abstract
[1,2,4]-Triazolo[4,3-a]-pyridine based bipolar red host materials, tris(4-([1,2,4]triazolo[4,3-a]pyridin-3-yl)phenyl)amine (TPATP) and tris(4′-([1,2,4]triazolo[4,3-a]pyridin-3-yl)biphenyl-4-yl)amine (TPAPTP) were synthesized for use in red phosphorescent organic light emitting diodes (PhOLEDs). [1,2,4]triazolo[4,3-a]pyridine enhances the electron transport, while the triphenylamine derivatives enhances the hole transport. Bipolar host materials were prepared by the combination of electron and hole transporting materials. The TPATP and TPAPTP have high triplet energy and appropriate HOMO and LUMO energy levels for charge transportation. Red PhOLED devices based on TPATP and TPAPTP as host materials and Ir(piq)2acac as dopant was fabricated, which showed electroluminescent performance with a maximum external quantum efficiencies of 6.04% for TPATP and 9.1% for TPAPTP, maximum power efficiency of 3.71cd/A for TPATP and 5.58cd/A for TPAPTP, and maximum luminance of 3.54cd/m2 for TPATP and 5.3cd/m2 for TPAPTP were obtained.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
