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Degradation behaviors of high power GaN-based blue light emitting diodes
The degradation mechanism of high power InGaN/GaN blue light emitting diodes (LEDs) is investigated in this paper. The LED samples were stressed at room temperature under 350-mA injection current for about 400 h. The light output power of the LEDs decreased by 35% during the first 100 h and then rem...
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Published in: | Chinese physics B 2013-11, Vol.22 (11), p.603-606 |
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creator | 钟灿涛 于彤军 颜建 陈志忠 张国义 |
description | The degradation mechanism of high power InGaN/GaN blue light emitting diodes (LEDs) is investigated in this paper. The LED samples were stressed at room temperature under 350-mA injection current for about 400 h. The light output power of the LEDs decreased by 35% during the first 100 h and then remained almost unchanged, and the reverse current at-5 V increased from 10^-9 A to 10^-7 A during the aging process. The power law, whose meaning was re-illustrated by the improved rate equation, was used to analyze the light output power-injection current (L-I) curves. The analysis results indicate that nonradiative recombination, Auger recombination, and the third-order term of carriers overflow increase during the aging process, all of which may be important reasons for the degradation of LEDs. Besides, simulating L-I curves with the improved rate equation reveal that higher-than-third-order terms of carriers overflow may not be the main degradation mechanism, because they change slightly when the LED is stressed. |
doi_str_mv | 10.1088/1674-1056/22/11/117804 |
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The LED samples were stressed at room temperature under 350-mA injection current for about 400 h. The light output power of the LEDs decreased by 35% during the first 100 h and then remained almost unchanged, and the reverse current at-5 V increased from 10^-9 A to 10^-7 A during the aging process. The power law, whose meaning was re-illustrated by the improved rate equation, was used to analyze the light output power-injection current (L-I) curves. The analysis results indicate that nonradiative recombination, Auger recombination, and the third-order term of carriers overflow increase during the aging process, all of which may be important reasons for the degradation of LEDs. Besides, simulating L-I curves with the improved rate equation reveal that higher-than-third-order terms of carriers overflow may not be the main degradation mechanism, because they change slightly when the LED is stressed.</description><identifier>ISSN: 1674-1056</identifier><identifier>EISSN: 2058-3834</identifier><identifier>EISSN: 1741-4199</identifier><identifier>DOI: 10.1088/1674-1056/22/11/117804</identifier><language>eng</language><subject>Augers ; Carriers ; Current carriers ; Degradation ; Indium gallium nitrides ; InGaN ; Injection current ; Light-emitting diodes ; Mathematical analysis ; 光输出功率 ; 注入电流 ; 老化过程 ; 蓝光发光二极管 ; 速率方程 ; 降解行为 ; 高功率</subject><ispartof>Chinese physics B, 2013-11, Vol.22 (11), p.603-606</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c314t-16877faa16e6f70d1593b57e76896bc6a27dd0e836343c4b31cb87378ecb3a143</citedby><cites>FETCH-LOGICAL-c314t-16877faa16e6f70d1593b57e76896bc6a27dd0e836343c4b31cb87378ecb3a143</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/85823A/85823A.jpg</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>钟灿涛 于彤军 颜建 陈志忠 张国义</creatorcontrib><title>Degradation behaviors of high power GaN-based blue light emitting diodes</title><title>Chinese physics B</title><addtitle>Chinese Physics</addtitle><description>The degradation mechanism of high power InGaN/GaN blue light emitting diodes (LEDs) is investigated in this paper. The LED samples were stressed at room temperature under 350-mA injection current for about 400 h. The light output power of the LEDs decreased by 35% during the first 100 h and then remained almost unchanged, and the reverse current at-5 V increased from 10^-9 A to 10^-7 A during the aging process. The power law, whose meaning was re-illustrated by the improved rate equation, was used to analyze the light output power-injection current (L-I) curves. The analysis results indicate that nonradiative recombination, Auger recombination, and the third-order term of carriers overflow increase during the aging process, all of which may be important reasons for the degradation of LEDs. Besides, simulating L-I curves with the improved rate equation reveal that higher-than-third-order terms of carriers overflow may not be the main degradation mechanism, because they change slightly when the LED is stressed.</description><subject>Augers</subject><subject>Carriers</subject><subject>Current carriers</subject><subject>Degradation</subject><subject>Indium gallium nitrides</subject><subject>InGaN</subject><subject>Injection current</subject><subject>Light-emitting diodes</subject><subject>Mathematical analysis</subject><subject>光输出功率</subject><subject>注入电流</subject><subject>老化过程</subject><subject>蓝光发光二极管</subject><subject>速率方程</subject><subject>降解行为</subject><subject>高功率</subject><issn>1674-1056</issn><issn>2058-3834</issn><issn>1741-4199</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNo9kE1LAzEQhoMoWKt_QeLNy9pMkk3So1RthaIXPYdkd_ZDtps22Sr-e7dUCgPvYd5nYB5CboE9ADNmBkrLDFiuZpzPAMbRhskzMuEsN5kwQp6Tyal0Sa5S-mJMAeNiQlZPWEdXuqENPfXYuO82xERDRZu2bug2_GCkS_eWeZewpL7bI-3GzUBx0w5D29e0bEOJ6ZpcVK5LePOfU_L58vyxWGXr9-Xr4nGdFQLkkIEyWlfOgUJVaVZCPhc-16iVmStfKMd1WTI0QgkpCukFFN5ooQ0WXjiQYkruj3e3Mez2mAa7aVOBXed6DPtkQSvO9AizsaqO1SKGlCJWdhvbjYu_Fpg9qLMHK_ZgxXJuAexR3Qje_YNN6Ovd-OSJlFrNJWdK_AFeBmvG</recordid><startdate>20131101</startdate><enddate>20131101</enddate><creator>钟灿涛 于彤军 颜建 陈志忠 张国义</creator><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>~WA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SP</scope><scope>7SR</scope><scope>7U5</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>JG9</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>20131101</creationdate><title>Degradation behaviors of high power GaN-based blue light emitting diodes</title><author>钟灿涛 于彤军 颜建 陈志忠 张国义</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c314t-16877faa16e6f70d1593b57e76896bc6a27dd0e836343c4b31cb87378ecb3a143</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Augers</topic><topic>Carriers</topic><topic>Current carriers</topic><topic>Degradation</topic><topic>Indium gallium nitrides</topic><topic>InGaN</topic><topic>Injection current</topic><topic>Light-emitting diodes</topic><topic>Mathematical analysis</topic><topic>光输出功率</topic><topic>注入电流</topic><topic>老化过程</topic><topic>蓝光发光二极管</topic><topic>速率方程</topic><topic>降解行为</topic><topic>高功率</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>钟灿涛 于彤军 颜建 陈志忠 张国义</creatorcontrib><collection>维普_期刊</collection><collection>中文科技期刊数据库-CALIS站点</collection><collection>维普中文期刊数据库</collection><collection>中文科技期刊数据库- 镜像站点</collection><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Chinese physics B</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>钟灿涛 于彤军 颜建 陈志忠 张国义</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Degradation behaviors of high power GaN-based blue light emitting diodes</atitle><jtitle>Chinese physics B</jtitle><addtitle>Chinese Physics</addtitle><date>2013-11-01</date><risdate>2013</risdate><volume>22</volume><issue>11</issue><spage>603</spage><epage>606</epage><pages>603-606</pages><issn>1674-1056</issn><eissn>2058-3834</eissn><eissn>1741-4199</eissn><abstract>The degradation mechanism of high power InGaN/GaN blue light emitting diodes (LEDs) is investigated in this paper. The LED samples were stressed at room temperature under 350-mA injection current for about 400 h. The light output power of the LEDs decreased by 35% during the first 100 h and then remained almost unchanged, and the reverse current at-5 V increased from 10^-9 A to 10^-7 A during the aging process. The power law, whose meaning was re-illustrated by the improved rate equation, was used to analyze the light output power-injection current (L-I) curves. The analysis results indicate that nonradiative recombination, Auger recombination, and the third-order term of carriers overflow increase during the aging process, all of which may be important reasons for the degradation of LEDs. Besides, simulating L-I curves with the improved rate equation reveal that higher-than-third-order terms of carriers overflow may not be the main degradation mechanism, because they change slightly when the LED is stressed.</abstract><doi>10.1088/1674-1056/22/11/117804</doi><tpages>4</tpages></addata></record> |
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source | Institute of Physics |
subjects | Augers Carriers Current carriers Degradation Indium gallium nitrides InGaN Injection current Light-emitting diodes Mathematical analysis 光输出功率 注入电流 老化过程 蓝光发光二极管 速率方程 降解行为 高功率 |
title | Degradation behaviors of high power GaN-based blue light emitting diodes |
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