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Cathodoluminescence...
Cathodoluminescence investigations of dark-line defects in platelet-based InGaN nano-LED structures
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- Gustafsson, Anders (author)
- Lund Univ, Sweden
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- Persson, Axel (author)
- Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten,Competence Center for III-Nitride Technology C3NiT–Janzén
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- Persson, Per O A (author)
- Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten
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- Darakchieva, Vanya (author)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten,Lund Univ, Sweden,Competence Center for III-Nitride Technology C3NiT–Janzén
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- Bi, Zhaoxia (author)
- Lund Univ, Sweden; Future Display Inst Xiamen, Peoples R China
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- Samuelson, Lars (author)
- Lund Univ, Sweden; Southern Univ Sci & Technol, Peoples R China
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(creator_code:org_t)
- IOP Publishing Ltd, 2024
- 2024
- English.
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In: Nanotechnology. - : IOP Publishing Ltd. - 0957-4484 .- 1361-6528. ; 35:25
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- We have investigated the optical properties of heterostructured InGaN platelets aiming at red emission, intended for use as nano-scaled light-emitting diodes. The focus is on the presence of non-radiative emission in the form of dark line defects. We have performed the study using hyperspectral cathodoluminescence imaging. The platelets were grown on a template consisting of InGaN pyramids, flattened by chemical mechanical polishing. These templates are defect free, whereas the dark line defects are introduced in the lower barrier and tend to propagate through all the subsequent layers, as revealed by the imaging of different layers in the structure. We conclude that the dark line defects are caused by stacking mismatch boundaries introduced by multiple seeding and step bunching at the edges of the as-polished, dome shaped templates. To avoid these defects, we suggest that the starting material must be flat rather than dome shaped.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- mu-LED; III-nitrides; platelets; cathodoluminescence; stacking mismatch boundaries
Publication and Content Type
- ref (subject category)
- art (subject category)
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