Improvement of lumen efficiency in white light-emitting diodes with air-gap embedded package
In this paper, white light-emitting diodes (LEDs) with air-gap embedded package were proposed and fabricated by a simple method including pulsed spray coating. The lumen efficiency of air-gap embedded LED was enhanced by 8.8% at driving current of 350mA, compared to conventional remote phosphor whit...
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| Veröffentlicht in: | Microelectronics and reliability 2012-05, Vol.52 (5), p.933-936 |
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| container_end_page | 936 |
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| container_title | Microelectronics and reliability |
| container_volume | 52 |
| creator | Chen, H.C. Chen, K.J. Lin, C.C. Wang, C.H. Yeh, C.C. Tsai, H.H. Shih, M.H. Kuo, H.C. |
| description | In this paper, white light-emitting diodes (LEDs) with air-gap embedded package were proposed and fabricated by a simple method including pulsed spray coating. The lumen efficiency of air-gap embedded LED was enhanced by 8.8% at driving current of 350mA, compared to conventional remote phosphor white LED. This improvement was due to the enhanced utilization of blue and yellow rays, which were confirmed by pulse current-dependent correlated color temperature (CCT). The utilization efficiency of blue rays was enhanced by 12.4% due to the embedded air-gap layer. The simulation results performed by Monte-Carlo ray tracing method agreed with our experiments, which showed enhancement in lumen efficiency and similar CCT. Finally, the electric field intensity versus different thickness for air-gap and no air-gap embedded white LED was calculated to check the incident blue rays trapped in phosphor layer. |
| doi_str_mv | 10.1016/j.microrel.2012.02.011 |
| format | Article |
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The lumen efficiency of air-gap embedded LED was enhanced by 8.8% at driving current of 350mA, compared to conventional remote phosphor white LED. This improvement was due to the enhanced utilization of blue and yellow rays, which were confirmed by pulse current-dependent correlated color temperature (CCT). The utilization efficiency of blue rays was enhanced by 12.4% due to the embedded air-gap layer. The simulation results performed by Monte-Carlo ray tracing method agreed with our experiments, which showed enhancement in lumen efficiency and similar CCT. Finally, the electric field intensity versus different thickness for air-gap and no air-gap embedded white LED was calculated to check the incident blue rays trapped in phosphor layer.</description><identifier>ISSN: 0026-2714</identifier><identifier>EISSN: 1872-941X</identifier><identifier>DOI: 10.1016/j.microrel.2012.02.011</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>Computing time ; Electric fields ; Light-emitting diodes ; Lumens ; Monte Carlo methods ; Packages ; Phosphors ; Utilization</subject><ispartof>Microelectronics and reliability, 2012-05, Vol.52 (5), p.933-936</ispartof><rights>2012</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c345t-6b42fb6614620db5a1d758c730f8c406eb2fbca487bc053bbdea85365b5dd7343</citedby><cites>FETCH-LOGICAL-c345t-6b42fb6614620db5a1d758c730f8c406eb2fbca487bc053bbdea85365b5dd7343</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0026271412000595$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Chen, H.C.</creatorcontrib><creatorcontrib>Chen, K.J.</creatorcontrib><creatorcontrib>Lin, C.C.</creatorcontrib><creatorcontrib>Wang, C.H.</creatorcontrib><creatorcontrib>Yeh, C.C.</creatorcontrib><creatorcontrib>Tsai, H.H.</creatorcontrib><creatorcontrib>Shih, M.H.</creatorcontrib><creatorcontrib>Kuo, H.C.</creatorcontrib><title>Improvement of lumen efficiency in white light-emitting diodes with air-gap embedded package</title><title>Microelectronics and reliability</title><description>In this paper, white light-emitting diodes (LEDs) with air-gap embedded package were proposed and fabricated by a simple method including pulsed spray coating. 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Finally, the electric field intensity versus different thickness for air-gap and no air-gap embedded white LED was calculated to check the incident blue rays trapped in phosphor layer.</description><subject>Computing time</subject><subject>Electric fields</subject><subject>Light-emitting diodes</subject><subject>Lumens</subject><subject>Monte Carlo methods</subject><subject>Packages</subject><subject>Phosphors</subject><subject>Utilization</subject><issn>0026-2714</issn><issn>1872-941X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqFkEtLAzEUhYMoWKt_QbJ0M2OSmclMd0rxUSi4UXAhhDzuTFPnZZK29N-bWl0LF-6Fe86B8yF0TUlKCeW367Sz2g0O2pQRylISh9ITNKFVyZJZTt9P0YQQxhNW0vwcXXi_JoSUUTRBH4tudMMWOugDHmrcbuKFoa6tttDrPbY93q1sANzaZhUS6GwItm-wsYMBj3c2rLC0LmnkiKFTYAwYPEr9KRu4RGe1bD1c_e4pent8eJ0_J8uXp8X8fpnoLC9CwlXOasU5zTkjRhWSmrKodJmRutI54aDiW8u8KpUmRaaUAVkVGS9UYUyZ5dkU3RxzY5WvDfggOus1tK3sYdh4QQljB8OsiFJ-lEZi3juoxehsJ90-isQBp1iLP5zigFOQOJRG493RCLHI1oIT_ocQGOtAB2EG-1_EN35QgxA</recordid><startdate>201205</startdate><enddate>201205</enddate><creator>Chen, H.C.</creator><creator>Chen, K.J.</creator><creator>Lin, C.C.</creator><creator>Wang, C.H.</creator><creator>Yeh, C.C.</creator><creator>Tsai, H.H.</creator><creator>Shih, M.H.</creator><creator>Kuo, H.C.</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>201205</creationdate><title>Improvement of lumen efficiency in white light-emitting diodes with air-gap embedded package</title><author>Chen, H.C. ; Chen, K.J. ; Lin, C.C. ; Wang, C.H. ; Yeh, C.C. ; Tsai, H.H. ; Shih, M.H. ; Kuo, H.C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c345t-6b42fb6614620db5a1d758c730f8c406eb2fbca487bc053bbdea85365b5dd7343</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Computing time</topic><topic>Electric fields</topic><topic>Light-emitting diodes</topic><topic>Lumens</topic><topic>Monte Carlo methods</topic><topic>Packages</topic><topic>Phosphors</topic><topic>Utilization</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chen, H.C.</creatorcontrib><creatorcontrib>Chen, K.J.</creatorcontrib><creatorcontrib>Lin, C.C.</creatorcontrib><creatorcontrib>Wang, C.H.</creatorcontrib><creatorcontrib>Yeh, C.C.</creatorcontrib><creatorcontrib>Tsai, H.H.</creatorcontrib><creatorcontrib>Shih, M.H.</creatorcontrib><creatorcontrib>Kuo, H.C.</creatorcontrib><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Microelectronics and reliability</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chen, H.C.</au><au>Chen, K.J.</au><au>Lin, C.C.</au><au>Wang, C.H.</au><au>Yeh, C.C.</au><au>Tsai, H.H.</au><au>Shih, M.H.</au><au>Kuo, H.C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Improvement of lumen efficiency in white light-emitting diodes with air-gap embedded package</atitle><jtitle>Microelectronics and reliability</jtitle><date>2012-05</date><risdate>2012</risdate><volume>52</volume><issue>5</issue><spage>933</spage><epage>936</epage><pages>933-936</pages><issn>0026-2714</issn><eissn>1872-941X</eissn><abstract>In this paper, white light-emitting diodes (LEDs) with air-gap embedded package were proposed and fabricated by a simple method including pulsed spray coating. 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| source | Elsevier ScienceDirect Journals |
| subjects | Computing time Electric fields Light-emitting diodes Lumens Monte Carlo methods Packages Phosphors Utilization |
| title | Improvement of lumen efficiency in white light-emitting diodes with air-gap embedded package |
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