Synthesis and application of anchored 2,3,5-trifluoro-7,7,8,8-tetracyanoquinodimethane (F3TCNQ) as organic molecular dopants in OLEDs.


Phillip K. Koech, James E. Rainbolt, Asanga B. Padmaperuma, Evgueni Polikarpov, Jens T. Darsell, Glen E. Fryxell, Linda S. Sapochak, and Daniel J. Gaspar. Energy and Efficiency Division, Pacific Northwest National Laboratory, 908 Battelle Blvd, MS K2-44, Richland, WA 99352
Organic light-emitting device (OLED) technology has the potential to provide power efficient solid-state white lighting. This application will require low-cost development of OLEDs with very high quantum efficiencies of light emission and low device operating voltages. High quantum efficiency is attainable in organometallic phosphor-doped OLEDs, where close to 100% internal quantum efficiency has been demonstrated. Significant reduction in OLED operating voltages have been realized using inorganic or small molecular weight organic compounds doped into the charge transport layers via vacuum co-evaporation. The strong organic acceptor, 2,3,5,6-tetrafluoro-7,7,8,8,-tetracyanoquinodimethane (F4TCNQ) is commonly used as a p-dopant. However, controlling doping concentration and molecular diffusion remains a challenge because F4TCNQ has a high volatility. One approach to the problem is to tether the molecular dopant to a molecular anchor without compromising the electron accepting properties of the dopant. Synthesis of anchored F3TCNQ, photophysical, and device data will be discussed.

Material, Devices and Switches
2:00 PM-5:00 PM, Sunday, March 22, 2009 Salt Palace Convention Center -- 155 D, Oral

Division of Organic Chemistry

The 237th ACS National Meeting, Salt Lake City, UT, March 22-26, 2009