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.

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 September 1, 2014 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 September 1, 2014).

Share This




More Matter & Energy News

Monday, September 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Australian Airlines Relax Phone Ban Too

Australian Airlines Relax Phone Ban Too

Reuters - Business Video Online (Aug. 26, 2014) Qantas and Virgin say passengers can use their smartphones and tablets throughout flights after a regulator relaxed a ban on electronic devices during take-off and landing. As Hayley Platt reports the move comes as the two domestic rivals are expected to post annual net losses later this week. Video provided by Reuters
Powered by NewsLook.com
Hurricane Marie Brings Big Waves to California Coast

Hurricane Marie Brings Big Waves to California Coast

Reuters - US Online Video (Aug. 26, 2014) Huge waves generated by Hurricane Marie hit the Southern California coast. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Chinese Researchers Might Be Creating Supersonic Submarine

Chinese Researchers Might Be Creating Supersonic Submarine

Newsy (Aug. 26, 2014) Chinese researchers have expanded on Cold War-era tech and are closer to building a submarine that could reach the speed of sound. Video provided by Newsy
Powered by NewsLook.com
Breakingviews: India Coal Strained by Supreme Court Ruling

Breakingviews: India Coal Strained by Supreme Court Ruling

Reuters - Business Video Online (Aug. 26, 2014) An acute coal shortage is likely to be aggravated as India's supreme court declared government coal allocations illegal, says Breakingviews' Peter Thal Larsen. Video provided by Reuters
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:
from the past week

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