Synthesis and Electroluminescent Properties of Blue Fluorescent Triphenylamine Substituted Anthracene Derivatives for OLEDs

Abstract

We describe the electroluminescent properties of blue fluorescent materials based on mono(triphenylamino)anthracene derivatives synthesized via Suzuki cross coupling reactions. To explore the electroluminescent properties of materials 1–3, multilayered OLEDs were fabricated and all devices exhibited efficient blue emissions. Among those, device 1, with CIE x,y coordinates of (0.159, 0.166) at 12.0 V, exhibited the best performance, with a maximum luminance of 7306 cd/m² at 12.0 V, and luminous and power efficiencies of 4.95 cd/A and 1.83 lm/W at 20 mA/cm², respectively.

Keywords:

• Blue fluorescent materials
• mono(triphenylamino)anthracene derivatives
• multilayered OLEDs
• Suzuki cross-coupling reaction

Acknowledgments

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (20090073679).

Notes

^{a , b} Maximum absorption or emission wavelength, measured in CH₂Cl₂ solution.

^c Obtained from AC-2 and UV-vis absorption measurements.

^d Using BDAVBi as a standard; λ_ex = 360 nm (Φ = 0.86 in CH₂Cl₂ solution).

Device (ITO/NPB/ADN: blue dopant materials 1–3 (2%)/Alq₃/Liq/Al).

^a Value collected at 12.0 V.

^b Maximum luminance at 12.0 V.

^c Luminous efficiency at 20 mA/cm².

^d Maximum luminous efficiency.

^e Power efficiency at 20 mA/cm².

^f Maximum power efficiency.

^g Nondoped device with a configuration of ITO/NPB (50 nm)/EML/TPBI (30 nm)/LiF/MgAg [17].