Nitride Based Quantum Dots for Light Emission

Project funded by Swedish Research Council (Project grant), grant 2011-04258_VR. Participating organisations named by the source: Linköping University. Funded amount: SEK 3,200,000, as stated by the source. Runs 2012-01-01 to 2015-12-31. Keywords: Naturvetenskap, Natural Sciences, Fysik, Physical Sciences, Den kondenserade materiens fysik, Condensed Matter Physics. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2025-12-05); national funding data, not CORDIS. Abstract given by the source: Nitride based semiconductor structures (InN-GaN-AlN) have an extensive potential as blue/UV light emitters. However, the unavoidable high density of dislocations constitutes a serious limitation of bulk nitride based emitters, since these defects serve as efficient emission killers and accordingly harm the luminous efficiency. In this application, we present a way to circumvent this limitation by employing quantum dots (QDs), which are expected to be essentially dislocation free. Provided that the carriers can be injected/captured into the dot, the recombination will remain essentially radiative, in spite of the parasitic non-radiative centers in the vicinity of the dot. Based on an evaluation performed on different fabrication methods to make nitride quantum structures, we will focus on pyramidal structures grown on a patterned silicon nitride film. InGaN QDs will be formed at the tip of the pyramid. The pyramidal growth offers a controllable position and size/shape of the dots, and accordingly more well-defined emission energies. Such deterministic QDs have considerable advantages for light emitter applications. Optical characterization will be performed by means of micro- luminescence, near-field spectroscopy, SNOM and time resolved luminescence. Comparisons on the optical properties with nitride based QDs fabricated with other techniques, e.g. Stranski-Krastanov QDs and dots-in-wire will be performed.

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of Swedish Research Council. Retrieved 2026-10-28. Licence: Creative Commons Attribution 4.0 (OpenAIRE Graph). Selected metadata, adapted presentation; the publisher's record is authoritative. No endorsement by the source is implied. Licence: Creative Commons Attribution 4.0 (CC BY 4.0).

AI-assisted summary: A project funded by the Swedish Research Council, running from 2012 to 2015, investigates nitride-based quantum dots for light emission to overcome limitations of bulk nitride emitters. Suggested technology pillar: enabling. Generated by AI from the public source text; it may contain errors and the original source is authoritative.