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Optical and Electronic Properties of InGaN/GaN Multi-Quantum-Wells Near-Ultraviolet Lighting-Emitting-Diodes Grown by Low-Pressure Metalorganic Vapour Phase Epitaxy

Li Zhong-Hui, Yang Zhi-Jian, Qin Zhi-Xin, Tong Yu-Zhen, Yu Tong-Jun, Lu Shu, Yang Hua and Zhang Guo-Yi

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The near-ultraviolet lighting-emitting-diodes (UV-LEDs) with the InGaN/GaN multi-quantum-well (MQW) structure were grown by low-pressure metalorganic vapour phase epitaxy. The double crystal x-ray diffraction revealed a distinct second-order satellite peak. The near-ultraviolet InGaN/GaN MQW LEDs have been successfully fabricated to emit at 401.2 nm with narrow FWHM of 14.3 nm and the forward voltage of 3.6 V at 20 mA injection current at room temperature. With increasing forward current from 10 mA to 50 mA, the redshift of the peak wavelength was observed due to the band-gap narrowing caused by heat generation.


PACS

73.63.Hs Quantum wells

78.60.Fi Electroluminescence

81.07.St Quantum wells

78.67.De Quantum wells

71.20.Nr Semiconductor compounds

Subjects

Condensed matter: electrical, magnetic and optical

Semiconductors

Nanoscale science and low-D systems

Dates

Issue 8 (August 2003)

Received 27 March 2003



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