TMCnet News
KOREAN SCIENTISTS CREATE HIGHLY EFFICIENT GREEN QUANTUM DOT LEDSEOUL, May 12, 2009 (AsiaPulse via COMTEX) -- Korean scientists said Monday they have created a highly efficient light emitting diode (LED) that can help develop next-generation displays and computer chips. The Seoul National University team said it has perfected a new production method that can produce high-quality green quantum dot LEDs with superior brightness and purity characteristics that are easier to make than existing products. The development was published in the latest edition of "Advanced Materials," an international peer-review science journal, and was featured in the April 22 issue of "Asia Materials." The breakthrough is noteworthy because efforts to develop green quantum dot LEDs have generally resulted in expensive and poor-quality products that are limited in overall use. Most LEDs are red-light based. The team led by Char Kook-heon, a chemical and biological engineering professor and Lee Chang-hee, a faculty member of the university's electronics and computer engineering department, said the new LDE has twice the efficiency, three times the brightness and 20 percent improved purity compared to existing products. The new production method also cut costs and manufacturing time by around 30 percent, they added. Experts say quantum dot technology is gaining importance because it possesses superior electric and optical qualities that can be employed to make advanced semiconductors, light sources and display panels. (Yonhap) |