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“It (paper) describes a method using organometallic phosphor compounds in a unique thin film device structure.”
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The area of solid-state lighting is of great current interest
and importance. Our work addresses a new and extremely efficient
means to provide room illumination using high efficiency organic
light-emitting devices. The results indicate that these devices
can provide intense room lighting that is superior in efficiency
to current incandescent lighting.
Does
it describe a new discovery or a new methodology that’s useful
to others?
It describes a method using organometallic phosphor compounds
in a unique thin-film device structure. This result is not only
a proof of principle that high efficiencies are attainable using
organic thin films, but also is a practical solution to reducing
energy usage.
Could
you summarize the significance of your paper in layman’s terms?
The thin-film device, consisting of only 100nm-thick layers
of organic materials, is deposited onto a glass substrate. When
current is passed through the organic layers—where organic implies
"carbon-containing"—white light is emitted at very
high efficiency. The mechanism for generating white light is by
doping the layers with a very small concentration of three types
of iridium-based organic phosphors that emit red, green, or blue
light to compose the white light output through the glass.
How
did you become involved in this research?
I have been interested in displays and lighting for many
years. This work was a natural outgrowth of that research in
always seeking a means to improve optical device emission color
purity and efficiency.
Stephen R. Forrest
James S. McDonnell Distinguished University Professor of
Electrical Engineering
Department of Electrical Engineering
Princeton University
Princeton, NJ, USA
