Publication

Dilute-nitride GaInAsN/GaAs site-controlled pyramidal quantum dots

Elyahou Kapon, Alok Rudra, Benjamin Dwir
2011
Journal Articles

Abstract

GaInAsN quantum dots (QDs) were grown in inverted pyramids on a patterned (111) B GaAs surface. Incorporation of N in the active structure is attested to by a significant (similar to 80 meV) redshift of the photoluminescence spectrum of the QDs. Influence of the capillarity effect on the N incorporation is evidenced by comparing the redshift in the QD emission to that of its quantum wire (QWR) barriers. The significant increase in the inhomogeneous broadening of the InGaAsN QD arrays as compared to similar InGaAs QDs is explained by the large influence of a small number of N atoms and their configuration within the QD on its effective bandgap and confinement energy. (C) 2011 American Institute of Physics. [doi:10.1063/1.3657770]

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https://infoscience.epfl.ch/entities/publication/245749e8-3672-4c9f-b206-7a91950d0eb2

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Elyahou Kapon, Alok Rudra, Benjamin Dwir
2011
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/245749e8-3672-4c9f-b206-7a91950d0eb2

About this result

Related concepts (32)

Quantum dot

Quantum dots (QDs) – also called semiconductor nanocrystals, are semiconductor particles a few nanometres in size, having optical and electronic properties that differ from those of larger particles as a result of quantum mechanics. They are a central topic in nanotechnology and materials science. When the quantum dots are illuminated by UV light, an electron in the quantum dot can be excited to a state of higher energy. In the case of a semiconducting quantum dot, this process corresponds to the transition of an electron from the valence band to the conductance band.

Quantum dot display

A quantum dot display is a display device that uses quantum dots (QD), semiconductor nanocrystals which can produce pure monochromatic red, green, and blue light. Photo-emissive quantum dot particles are used in LCD backlights or display color filters. Quantum dots are excited by the blue light from the display panel to emit pure basic colors, which reduces light losses and color crosstalk in color filters, improving display brightness and color gamut.

Wide-bandgap semiconductor

Wide-bandgap semiconductors (also known as WBG semiconductors or WBGSs) are semiconductor materials which have a larger band gap than conventional semiconductors. Conventional semiconductors like silicon have a bandgap in the range of 0.6 – 1.5 electronvolt (eV), whereas wide-bandgap materials have bandgaps in the range above 2 eV. Generally, wide-bandgap semiconductors have electronic properties which fall in between those of conventional semiconductors and insulators.

Related publications (32)

Dilute-nitride GaInAsN/GaAs site-controlled pyramidal quantum dots

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