Title :
Green Electroluminescence From ZnCdO Multiple Quantum-Well Light-Emitting Diodes Grown by Remote-Plasma-Enhanced Metal–Organic Chemical Vapor Deposition
Author :
Yamamoto, Kenji ; Nakamura, Atsushi ; Temmyo, Jiro ; Muñoz, Elías ; Hierro, Adrian
Author_Institution :
Res. Inst. of Electron., Shizuoka Univ., Hamamatsu, Japan
Abstract :
Zn0.80Cd0.20O/Zn0.92Cd0.08O multiple quantum-well (MQW) light-emitting diodes (LEDs) on p-type 4H-SiC substrates, using remote-plasma-enhanced metal-organic chemical vapor deposition, have been fabricated and characterized. Band-edge green electroluminescence (EL) at 500 nm has been obtained. The ZnCdO MQW LEDs show a rectifying current-voltage behavior with a turn-on voltage of 6.0 V. The integrated EL intensity linearly increases with increasing injection current density up to 1.9 A/cm2. Furthermore, the presence of an EL blue-shift of 20 nm with increasing current and a large EL spectral width in comparison to PL are discussed in terms of Cd compositional fluctuations.
Keywords :
II-VI semiconductors; MOCVD coatings; cadmium compounds; electroluminescence; light emitting diodes; plasma CVD coatings; quantum well devices; spectral line shift; zinc compounds; Zn0.80Cd0.20O-Zn0.92Cd0.08O; band edge green electroluminescence; electroluminescence blue shift; multiple quantum well light emitting diodes; rectifying current-voltage behavior; remote plasma enhanced metal organic chemical vapor deposition; voltage 6 V; wavelength 500 nm; Current density; Fluctuations; Light emitting diodes; Quantum well devices; Substrates; Zinc oxide; Electroluminescence (EL); light-emitting diode (LED); metal–organic chemical vapor deposition; multiple quantum wells; zinc oxide;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2152389
