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Green Electroluminescence From ZnCdO Multiple Quantum-Well Light-Emitting Diodes Grown by Remote-Plasma-Enhanced Metal–Organic Chemical Vapor Deposition

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5 Author(s)
Yamamoto, Kenji ; Res. Inst. of Electron., Shizuoka Univ., Hamamatsu, Japan ; Nakamura, Atsushi ; Temmyo, J. ; Muoz, E.
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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.

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Photonics Technology Letters, IEEE  (Volume:23 ,  Issue: 15 )