Journal ArticleDOI
Inclusion of Indium, with doping in the barriers of In x Ga 1-x N/In y Ga 1-y N quantum wells reveals striking modifications of the emission properties with current for better operation of LEDs
TLDR
In this paper, the incorporation of Indium (In) in the GaN barrier layers, with an aim of increasing the overlap of electron and hole wave functions, has been investigated.Abstract:
Although that the continuous tunability of InGaN/GaN QW LEDs, carries the promise of a significant impact in optoelectronics, the reduction of the square of the overlap of electron and hole wave functions ( M e h 2 ) in InGaN/GaN QW LEDs, under certain conditions, is a sizable problem, difficult to overcome. Theoretical investigations have been carried out on the incorporation of Indium (In) in the GaN barrier layers, with an aim of increasing the overlap of electron and hole wave functions. Rigorous studies through the self consistent solution of Schrodinger and Poison equations expose some new and striking results. With suitable doping, the inclusion of In in the barriers can increase M e h 2 to more than two times that of a conventional InGaN/GaN QW LED. In in the barrier along with doping may be suitably utilized to tailor the transition energy and M e h 2 with current density, as desired. The transition energy and the M e h 2 may be made to have a positive or a negative slope with current density or they may be made fairly constant. This paper will outline the theoretical details, computational methodologies, the parameters used, and the striking new results with suitable depictions and discussions. These new information ought to be interesting for current optoelectronics.read more
Citations
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Journal ArticleDOI
DFT Calculation on the Electronic Structure and Optical Properties of InxGa1-xN Alloy Semiconductors
TL;DR: Using the density functional theory (DFT) of the first principle and generalized gradient approximation method, the electronic structures and optical properties of the InxGa1-xN crystals with different x (x ǫ = 0.25, 0.75, 1) have been calculated in this paper.
Journal ArticleDOI
Performance improvement of green QW LEDs, for the different doping in the barriers, using InAlN interlayer and strain compensated AlGaN interlayer at the InGaN/GaN interface
Apu Mistry,Apu Mistry +1 more
TL;DR: In this article, the performance of green emission using different doping in the barriers has been studied when the In02Al08N interlayer (IL) or Al08Ga02N IL is used at the interface of In026Ga074N/GaN QW LEDs.
Journal ArticleDOI
InGaN based tunable green light-emitting diodes using InAlN interlayer and strain compensated AlGaN interlayer for better device performance
Apu Mistry,Apu Mistry +1 more
TL;DR: In this paper, the effect of employing an InyAl1−yN and AlyGa1 −yN interlayer (IL) in the InxGa1−xN/GaN active region for the green light-emitting diodes (LEDs) has been studied.
Journal ArticleDOI
Near-infrared light emitting diodes based on the type-II InGaN-ZnSnN2/GaN quantum wells
TL;DR: In this article, a type-II InGaN-ZnSnN2/GaN quantum well (QW) light emitting diode structure is presented for the near-infrared emission.
References
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Evidence for nonlinear macroscopic polarization in III-V nitride alloy heterostructures
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Spontaneous and Stimulated Recombination Radiation in Semiconductors
Gordon J Lasher,Frank Stern +1 more
TL;DR: In this article, the spectral line shapes of the radiation produced by band-to-band recombination of excess carriers in semi-conductors are calculated under the assumption that the momentum matrix element is the same for all initial and final states, i.e., that there is no momentum selection rule.
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Variational calculations on a quantum well in an electric field
TL;DR: In this paper, the eigenstate of an isolated quantum well subject to an external electric field was analyzed and a quadratic Stark shift was found whose magnitude depended strongly on the finite well depth.