Studies of InGaN∕GaN multiquantum-well green-light-emitting diodes grown by metalorganic chemical vapor deposition | Zendy

Ramaiah Konakanchi | Zendy; Y.K. Su | Zendy; Sue-Joan Chang | Zendy; C. H. Chen | Zendy; FuhShyang Juang | Zendy; H. P. Liu | Zendy; I. G. Chen | Zendy

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Studies of InGaN∕GaN multiquantum-well green-light-emitting diodes grown by metalorganic chemical vapor deposition

Author(s) -

Ramaiah Konakanchi,

Y.K. Su,

Sue-Joan Chang,

C. H. Chen,

FuhShyang Juang,

H. P. Liu,

I. G. Chen

Publication year - 2004

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1773371

Subject(s) - photoluminescence , chemical vapor deposition , high resolution transmission electron microscopy , materials science , quantum well , light emitting diode , optoelectronics , diode , blueshift , wide bandgap semiconductor , transmission electron microscopy , optics , nanotechnology , physics , laser

InGaN(3nm)∕GaN(5nm) three period multiquantum green-light-emitting diodes (LEDs) grown by the metalorganic chemical vapor deposition technique have been studied using high-resolution transmission electron microscopy (HRTEM), double crystal high resolution x-ray diffraction (HRXRD) and low temperature photoluminescence. HRTEM analysis showed that the defect density gradually decreased in the growth direction with increasing thickness. Self-assembled quantum dot-like structures in the wells and black lumps between the well and barrier due to In segregation and strain contrast were observed, respectively. The HRXRD spectrum of the green LED structure was simulated using the kinematical theory method to obtain the composition and thickness of the well and barrier. The quantum-well (QW) green emission peak 2.557eV at 10K showed “S” shaped shift like a red–blue–red shift with variation of the temperature in the photoluminescence spectra due to potential fluctuations caused by inhomogeneous alloy distribution in...

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