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Size-Dependent Electroluminescence and Current-Voltage Measurements of Blue InGaN/GaN µLEDs down to the Submicron Scale

Besides high-power light-emitting diodes (LEDs) with dimensions in the range of mm, micro-LEDs (μLEDs) are increasingly gaining interest today, motivated by the future applications of μLEDs in augmented reality displays or for nanometrology and sensor technology. A key aspect of this miniaturization...

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Autores principales: Wolter, Stefan, Spende, Hendrik, Gülink, Jan, Hartmann, Jana, Wehmann, Hergo-Heinrich, Waag, Andreas, Lex, Andreas, Avramescu, Adrian, Lugauer, Hans-Jürgen, von Malm, Norwin, Drolet, Jean-Jacques, Strassburg, Martin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8064358/
https://www.ncbi.nlm.nih.gov/pubmed/33805881
http://dx.doi.org/10.3390/nano11040836
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author Wolter, Stefan
Spende, Hendrik
Gülink, Jan
Hartmann, Jana
Wehmann, Hergo-Heinrich
Waag, Andreas
Lex, Andreas
Avramescu, Adrian
Lugauer, Hans-Jürgen
von Malm, Norwin
Drolet, Jean-Jacques
Strassburg, Martin
author_facet Wolter, Stefan
Spende, Hendrik
Gülink, Jan
Hartmann, Jana
Wehmann, Hergo-Heinrich
Waag, Andreas
Lex, Andreas
Avramescu, Adrian
Lugauer, Hans-Jürgen
von Malm, Norwin
Drolet, Jean-Jacques
Strassburg, Martin
author_sort Wolter, Stefan
collection PubMed
description Besides high-power light-emitting diodes (LEDs) with dimensions in the range of mm, micro-LEDs (μLEDs) are increasingly gaining interest today, motivated by the future applications of μLEDs in augmented reality displays or for nanometrology and sensor technology. A key aspect of this miniaturization is the influence of the structure size on the electrical and optical properties of μLEDs. Thus, in this article, investigations of the size dependence of the electro-optical properties of μLEDs, with diameters in the range of 20 to 0.65 μm, by current–voltage and electroluminescence measurements are described. The measurements indicated that with decreasing size leakage currents in the forward direction decrease. To take advantage of these benefits, the surface has to be treated properly, as otherwise sidewall damages induced by dry etching will impair the optical properties. A possible countermeasure is surface treatment with a potassium hydroxide based solution that can reduce such defects.
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spelling pubmed-80643582021-04-24 Size-Dependent Electroluminescence and Current-Voltage Measurements of Blue InGaN/GaN µLEDs down to the Submicron Scale Wolter, Stefan Spende, Hendrik Gülink, Jan Hartmann, Jana Wehmann, Hergo-Heinrich Waag, Andreas Lex, Andreas Avramescu, Adrian Lugauer, Hans-Jürgen von Malm, Norwin Drolet, Jean-Jacques Strassburg, Martin Nanomaterials (Basel) Article Besides high-power light-emitting diodes (LEDs) with dimensions in the range of mm, micro-LEDs (μLEDs) are increasingly gaining interest today, motivated by the future applications of μLEDs in augmented reality displays or for nanometrology and sensor technology. A key aspect of this miniaturization is the influence of the structure size on the electrical and optical properties of μLEDs. Thus, in this article, investigations of the size dependence of the electro-optical properties of μLEDs, with diameters in the range of 20 to 0.65 μm, by current–voltage and electroluminescence measurements are described. The measurements indicated that with decreasing size leakage currents in the forward direction decrease. To take advantage of these benefits, the surface has to be treated properly, as otherwise sidewall damages induced by dry etching will impair the optical properties. A possible countermeasure is surface treatment with a potassium hydroxide based solution that can reduce such defects. MDPI 2021-03-25 /pmc/articles/PMC8064358/ /pubmed/33805881 http://dx.doi.org/10.3390/nano11040836 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ).
spellingShingle Article
Wolter, Stefan
Spende, Hendrik
Gülink, Jan
Hartmann, Jana
Wehmann, Hergo-Heinrich
Waag, Andreas
Lex, Andreas
Avramescu, Adrian
Lugauer, Hans-Jürgen
von Malm, Norwin
Drolet, Jean-Jacques
Strassburg, Martin
Size-Dependent Electroluminescence and Current-Voltage Measurements of Blue InGaN/GaN µLEDs down to the Submicron Scale
title Size-Dependent Electroluminescence and Current-Voltage Measurements of Blue InGaN/GaN µLEDs down to the Submicron Scale
title_full Size-Dependent Electroluminescence and Current-Voltage Measurements of Blue InGaN/GaN µLEDs down to the Submicron Scale
title_fullStr Size-Dependent Electroluminescence and Current-Voltage Measurements of Blue InGaN/GaN µLEDs down to the Submicron Scale
title_full_unstemmed Size-Dependent Electroluminescence and Current-Voltage Measurements of Blue InGaN/GaN µLEDs down to the Submicron Scale
title_short Size-Dependent Electroluminescence and Current-Voltage Measurements of Blue InGaN/GaN µLEDs down to the Submicron Scale
title_sort size-dependent electroluminescence and current-voltage measurements of blue ingan/gan µleds down to the submicron scale
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8064358/
https://www.ncbi.nlm.nih.gov/pubmed/33805881
http://dx.doi.org/10.3390/nano11040836
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