Wednesday April 25, 2007

100% efficient organic light

peakoil.com -> sciencedaily.com :

The long, challenging technological march from the low-power light bulb Thomas Edison invented to the ultimate in a bright and energy-efficient lighting device may reach fruition in work led by the two Arizona State University researchers. A recent story in the journal Advanced Materials, details advances in the use of organic light-emitting diodes (OLEDs) by Ghassan Jabbour and Jian Li, with help from graduate students Evan Williams and Kirsi Haavisto, a Fulbright scholar from Finland.

These researchers have developed an organic lighting device with "100 percent internal quantum efficiency" by employing newly designed host materials coupled with optimized device architecture. Internal quantum efficiency involves the number of photons generated inside the device per each electron from the electricity source. What's particularly significant about the researchers' work is that their optimized device adopts an even simpler structure than any yet reported by other research groups. "There is no waste of electricity," Jabbour says. "All the current you are putting into the device is being used to produce light. It's the first time something like this has been demonstrated. Nobody else has shown a 100 percent internal quantum efficiency for lighting devices using a single molecular dopant to emit white light."

The achievement promises significant progress in the development of solid-state lighting based on OLED technology that can be manufactured at low costs. Such devices also could provide a major source for progress in global environmental efforts to conserve energy and natural resources.

(2007-04-25 15:04:25 SGT) [Energy] Permalink

Most popular blog postings on lowem.log :

1. 2010 Nissan Leaf electric car specifications : 107hp, 24KWh lithium-ion batteries, 100-mile range
2. 2010 Honda CR-Z hybrid, 2010 Honda Fit/Jazz hybrid models confirmed
3. 2010 Honda Civic Hybrid preliminary specifications released
4. Singapore SIBOR rate falls to 0.69% in Jan 2009, lowest since Apr 2004
5. How to insert currency exchange rates into Google Spreadsheets
6. Singapore : Nuclear power not ruled out
7. Live spot gold price quotes chart on COMEX
8. 2010 Toyota Prius specifications released : 50 mpg, 1.8L, 134hp, Ni-MH, solar roof option

Featured articles on lowem.log :

1. 2010 Honda Civic Hybrid preliminary specifications released
2. 2010 Honda CR-Z hybrid, 2010 Honda Fit/Jazz hybrid models confirmed
3. 2010 Toyota Prius specifications released : 50 mpg, 1.8L, 134hp, Ni-MH, solar roof option
4. Honda, GS Yuasa JV to make lithium-ion batteries for 2010/2011 Honda Civic Hybrid
5. New efficient nanotech materials may boost enhanced geothermal power systems
6. NYMEX crude oil recovers from $32.40 low after 2.2 mbpd OPEC production cut announced
7. Singapore property market recovery seen as private home sales surge 52% in Jul 2009
8. Singapore SIBOR rate falls to 0.69% in Jan 2009, lowest since Apr 2004