Featured Research

from universities, journals, and other organizations

Efficient Organic LEDs A Step Toward Better Lights

Date:
December 25, 2008
Source:
University of Florida
Summary:
For those who love "green" compact fluorescent bulbs but hate their cold light, here's some good news: Researchers are closer to flipping the switch on cheaper, richer LED-type room lighting.

For those who love “green” compact fluorescent bulbs but hate their cold light, here’s some good news: Researchers are closer to flipping the switch on cheaper, richer LED-type room lighting.

Related Articles


University of Florida materials science and engineers have achieved a new record in efficiency of blue organic light-emitting diodes, or OLEDs. Because blue is essential to white light, the advance helps overcome a hurdle to lighting that is much more efficient than compact fluorescents — but can produce high-quality light similar to standard incandescent bulbs.

“The quality of the light is really the advantage,” said Franky So, a UF associate professor of materials science and engineering and the lead investigator on the project.

The U.S. Department of Energy, which funded the research, reported the results on its Web site. Papers about it appeared earlier this year in the journal Applied Physics Letters.

OLEDs are similar to inorganic light emitting devices, or LEDs, but are built with organic semiconductors on large area glass substrates rather than inorganic semiconductor wafers. When used in display screens computer monitors, they have higher efficiency, better color saturation and a larger viewing angle. OLED displays are also used in cell phones, cameras and personal digital assistants. OLED flat panel TVs were introduced by Sony recently.

So and his team’s blue OLED achieved a peak efficiency of 50 lumens — a lumen is a measure of brightness perceived by human eyes — per watt. That’s a significant step toward the goal of his project: to achieve white light with efficiency higher than 100 lumens per watt.

So said the fact that OLEDs are highly “tunable” — each OLED is an individual light, which means differently colored OLEDs can be combined to produced different shades of light — puts warm, rich light easily within reach. “The quality of the light generated can easily be tuned by using different color emitters” he said. “You can make it red, green, blue or white.”


Story Source:

The above story is based on materials provided by University of Florida. Note: Materials may be edited for content and length.


Cite This Page:

University of Florida. "Efficient Organic LEDs A Step Toward Better Lights." ScienceDaily. ScienceDaily, 25 December 2008. <www.sciencedaily.com/releases/2008/12/081223121129.htm>.
University of Florida. (2008, December 25). Efficient Organic LEDs A Step Toward Better Lights. ScienceDaily. Retrieved March 2, 2015 from www.sciencedaily.com/releases/2008/12/081223121129.htm
University of Florida. "Efficient Organic LEDs A Step Toward Better Lights." ScienceDaily. www.sciencedaily.com/releases/2008/12/081223121129.htm (accessed March 2, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Monday, March 2, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Solar Plane Passes New Test Ahead of World Tour

Solar Plane Passes New Test Ahead of World Tour

AFP (Mar. 2, 2015) A solar-powered plane made a third successful test flight in the United Arab Emirates on Monday ahead of a planned round-the-world tour to promote alternative energy. Duration: 01:05 Video provided by AFP
Powered by NewsLook.com
Electric Hydrofoiling Watercraft Delivers Eco-Friendly Thrills

Electric Hydrofoiling Watercraft Delivers Eco-Friendly Thrills

Reuters - Innovations Video Online (Mar. 2, 2015) The Quadrofoil is a high-tech electric personal watercraft that its makers call a &apos;sports car for the water&apos;. When it hits 10 km/h, the Slovenian-engineered Quadrofoil is lifted above the water onto four wing-like hydrofoils where it &apos;flies&apos; above the surface with minimal water resistance. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
The Tech Challenges Facing Automakers

The Tech Challenges Facing Automakers

Reuters - Business Video Online (Mar. 2, 2015) This year&apos;s The International Motor Show is getting underway in Geneva. As Sonia Legg reports its taking place as Europe&apos;s beleaguered car industry finally starts showing signs of picking up. Video provided by Reuters
Powered by NewsLook.com
HTC And Valve Team Up For Virtual Reality Headset

HTC And Valve Team Up For Virtual Reality Headset

Newsy (Mar. 1, 2015) HTC unveiled Vive, its new virtual reality headset, Sunday. The device is supported by gaming company Valve, which has made a push into the market. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins