+44-1518-081136Internal quantum efficiency of UVµLED chips for display
International Conference on Applied Physics & Laser, Optics and Photonics
April 15-16, 2019 | Frankfurt, Germany
Yoshihiko Muramoto, Masahiro Kimura and Akihiro Kondo
Nitride Semiconductors Co., Ltd., Japan
Posters & Accepted Abstracts : Mater Sci Nanotechnol
Abstract:
Micro light emitting diode (μLED) displays have been in development. When using three-color, i.e., red, blue, and green LEDs, or blue LEDs that excite red and green phosphors, many challenges arise in mass production, cost, and quality. Our group has devised an ultraviolet (UV)- excited red, green, and blue (RGB) display that excites red, green, and blue phosphors using UVLEDs. Tests confirm that the display’s efficiency is improved by the use of the micro-sized UV-LED chips that emit in the near-ultraviolet range. The UV µLED chip emitting at 385 nm exhibited a more linear output than a 400-nm purple µLED chip. This study examines how the composition and crystal defects of a light-emitting layer affect the light emission efficiency of a UV µLED chip from the perspective of internal quantum efficiency (IQE).
Biography:
E-mail:
muramoto@nitride.co.jpPDF HTML