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Novel Lower-Voltage OLEDs for
Higher-Efficiency Lighting--Universal Display Corporation,
Dr. Anna B. Chwang, Principal
Investigator,
Ms. Janice K. Mahon, Business
Official,
DOE Grant No. DE-FG02-03ER83813
Amount:
$100,000
Because general
lighting is responsible for more than 20% of the energy consumption in the U.S.,
new broadband white-lighting sources are sought that offer significantly greater
power efficiency and color quality, with less environmental impact than
traditional incandescent and fluorescent lights.
Recent breakthroughs in highly-efficient phosphorescent organic
light-emitting device (PHOLED) technology have fostered expectations that this
technology may someday provide such a solution.
Nonetheless, significant engineering challenges remain. One
of these challenges is to develop lower-voltage structures based on PHOLED
technology. This project will
demonstrate and develop a novel lower-voltage light emitting structure through
the development of more-highly-conductive
electron and hole transport layers in a PHOLED structure.
Phase I will demonstrate the feasibility of using conductivity
doping in the electron and hole transport layers to achieve power
efficiencies greater than 20 lm/W at a brightness of 800 cd/m2.
The high conductivity will be achieved by selecting n- and p-type dopants,
along with the appropriate organic buffer layers to reduce the operating
voltages to less than 3V.
Commercial
Applications and Other Benefits as described by awardee:
An energy-efficient, long-lived,
solid-state white organic light-emitting device (OLED) should find use in
diffuse lighting applications in the commercial, residential, and industrial
sectors. Based on novel features
like its thin, lightweight form, this product also could be used in novel
architectural, automotive, and wearable electronic applications.