Technical Insight
Cree raises near-UV LED efficiency record(LED News)
Cree raises near-UV LED efficiency record(LED News) Lighting Company (Goleta, CA) has demonstrated a near-UV/violet InGaN LED with a 32% external quantum efficiency. This is the highest known external quantum efficiency reported for an LED in the UV-to-blue portion of the wavelength spectrum, and exceeds Cree s previous result of 28% (see Compound Semiconductor August 2000, p25). High quantum efficiency in UV and near-UV LEDs is essential for driving phosphors to produce efficient white light sources. Cree s LED emits at 390 nm and has a power output of 21 mW (at a current of 20 mA).