InGaN/GaN multiple-quantum-well light-emitting diodes with a grading InN composition suppressing the Auger recombination
In conventional InGaN/GaN light-emitting diodes (LEDs), thin InGaN quantum wells are usually adopted to mitigate the quantum confined Stark effect (QCSE), caused due to strong polarization induced electric field, through spatially confining electrons and holes in small recombination volumes. However...
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sg-ntu-dr.10356-811992023-02-28T19:30:44Z InGaN/GaN multiple-quantum-well light-emitting diodes with a grading InN composition suppressing the Auger recombination Zhang, Zi-Hui Liu, Wei Ju, Zhengang Tan, Swee Tiam Ji, Yun Kyaw, Zabu Zhang, Xueliang Wang, Liancheng Sun, Xiao Wei Demir, Hilmi Volkan School of Electrical and Electronic Engineering School of Physical and Mathematical Sciences Electrons Current density Multiple quantum wells Light emitting diodes Polarization In conventional InGaN/GaN light-emitting diodes (LEDs), thin InGaN quantum wells are usually adopted to mitigate the quantum confined Stark effect (QCSE), caused due to strong polarization induced electric field, through spatially confining electrons and holes in small recombination volumes. However, this inevitably increases the carrier density in quantum wells, which in turn aggravates the Auger recombination, since the Auger recombination scales with the third power of the carrier density. As a result, the efficiency droop of the Auger recombination severely limits the LED performance. Here, we proposed and showed wide InGaN quantum wells with the InN composition linearly grading along the growth orientation in LED structures suppressing the Auger recombination and the QCSE simultaneously. Theoretically, the physical mechanisms behind the Auger recombination suppression are also revealed. The proposed LED structure has experimentally demonstrated significant improvement in optical output power and efficiency droop, proving to be an effective solution to this important problem of Auger recombination. ASTAR (Agency for Sci., Tech. and Research, S’pore) Published version 2015-12-23T01:15:44Z 2019-12-06T14:23:27Z 2015-12-23T01:15:44Z 2019-12-06T14:23:27Z 2014 Journal Article Zhang, Z.-H., Liu, W., Ju, Z., Tan, S. T., Ji, Y., Kyaw, Z., et al. (2014). InGaN/GaN multiple-quantum-well light-emitting diodes with a grading InN composition suppressing the Auger recombination. Applied Physics Letters, 105(3), 033506-. 0003-6951 https://hdl.handle.net/10356/81199 http://hdl.handle.net/10220/39209 10.1063/1.4891334 en Applied Physics Letters © 2014 American Institute of Physics (AIP). This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics (AIP). The published version is available at: [http://dx.doi.org/10.1063/1.4891334]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 6 p. application/pdf |
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Electrons Current density Multiple quantum wells Light emitting diodes Polarization Zhang, Zi-Hui Liu, Wei Ju, Zhengang Tan, Swee Tiam Ji, Yun Kyaw, Zabu Zhang, Xueliang Wang, Liancheng Sun, Xiao Wei Demir, Hilmi Volkan InGaN/GaN multiple-quantum-well light-emitting diodes with a grading InN composition suppressing the Auger recombination |
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In conventional InGaN/GaN light-emitting diodes (LEDs), thin InGaN quantum wells are usually adopted to mitigate the quantum confined Stark effect (QCSE), caused due to strong polarization induced electric field, through spatially confining electrons and holes in small recombination volumes. However, this inevitably increases the carrier density in quantum wells, which in turn aggravates the Auger recombination, since the Auger recombination scales with the third power of the carrier density. As a result, the efficiency droop of the Auger recombination severely limits the LED performance. Here, we proposed and showed wide InGaN quantum wells with the InN composition linearly grading along the growth orientation in LED structures suppressing the Auger recombination and the QCSE simultaneously. Theoretically, the physical mechanisms behind the Auger recombination suppression are also revealed. The proposed LED structure has experimentally demonstrated significant improvement in optical output power and efficiency droop, proving to be an effective solution to this important problem of Auger recombination. |
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School of Electrical and Electronic Engineering |
author_facet |
School of Electrical and Electronic Engineering Zhang, Zi-Hui Liu, Wei Ju, Zhengang Tan, Swee Tiam Ji, Yun Kyaw, Zabu Zhang, Xueliang Wang, Liancheng Sun, Xiao Wei Demir, Hilmi Volkan |
format |
Article |
author |
Zhang, Zi-Hui Liu, Wei Ju, Zhengang Tan, Swee Tiam Ji, Yun Kyaw, Zabu Zhang, Xueliang Wang, Liancheng Sun, Xiao Wei Demir, Hilmi Volkan |
author_sort |
Zhang, Zi-Hui |
title |
InGaN/GaN multiple-quantum-well light-emitting diodes with a grading InN composition suppressing the Auger recombination |
title_short |
InGaN/GaN multiple-quantum-well light-emitting diodes with a grading InN composition suppressing the Auger recombination |
title_full |
InGaN/GaN multiple-quantum-well light-emitting diodes with a grading InN composition suppressing the Auger recombination |
title_fullStr |
InGaN/GaN multiple-quantum-well light-emitting diodes with a grading InN composition suppressing the Auger recombination |
title_full_unstemmed |
InGaN/GaN multiple-quantum-well light-emitting diodes with a grading InN composition suppressing the Auger recombination |
title_sort |
ingan/gan multiple-quantum-well light-emitting diodes with a grading inn composition suppressing the auger recombination |
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2015 |
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https://hdl.handle.net/10356/81199 http://hdl.handle.net/10220/39209 |
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1759853322663100416 |