About NARUKAWA YUKIO
About 日亜化学工業 LED開発本部
About light emitting diode
About gallium nitride
About compound semiconductor
About blue light
About energy conversion efficiency
About white light
About epitaxy
About phosphor
About visible light
About yellow light
About light emitting diode
About Light emitting devices
About エピタキシャル
About LED
About 高性能化