Dependence of charge trapping of fluorescent and phosphorescent dopants in organic light-emitting diodes on the dye species and current density
This paper utilizes multilayer organic light-emitting diodes with a thin layer of dye molecules to study the mech- anism of charge trapping under different electric regimes. It demonstrates that the carrier trapping was independent of the current density in devices using fluorescent material as the...
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| Veröffentlicht in: | Chinese physics B 2010-03, Vol.19 (3), p.450-455 |
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| container_title | Chinese physics B |
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| creator | 魏斌 廖英杰 刘纪忠 路林 曹进 王军 张建华 |
| description | This paper utilizes multilayer organic light-emitting diodes with a thin layer of dye molecules to study the mech- anism of charge trapping under different electric regimes. It demonstrates that the carrier trapping was independent of the current density in devices using fluorescent material as the emitting molecule while this process was exactly opposite when phosphorescent material was used. The triplet-triplet annihilation and dissociation of excitons into free charge carriers was considered to contribute to the decrease in phosphorescent emission under high electric fields. Moreover, the fluorescent dye molecule with a lower energy gap and ionized potential than the host emitter was observed to facilitate the carrier trapping mechanism, and it would produce photon emission. |
| doi_str_mv | 10.1088/1674-1056/19/3/037105 |
| format | Article |
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It demonstrates that the carrier trapping was independent of the current density in devices using fluorescent material as the emitting molecule while this process was exactly opposite when phosphorescent material was used. The triplet-triplet annihilation and dissociation of excitons into free charge carriers was considered to contribute to the decrease in phosphorescent emission under high electric fields. 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Moreover, the fluorescent dye molecule with a lower energy gap and ionized potential than the host emitter was observed to facilitate the carrier trapping mechanism, and it would produce photon emission.</description><subject>Charge</subject><subject>Current density</subject><subject>Dyes</subject><subject>Electric charge</subject><subject>Electric fields</subject><subject>Emittance</subject><subject>Light-emitting diodes</subject><subject>Trapping</subject><subject>依赖性</subject><subject>掺杂剂</subject><subject>有机发光二极管</subject><subject>染料种类</subject><subject>电流密度</subject><subject>荧光灯</subject><issn>1674-1056</issn><issn>2058-3834</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNqNkc1u1DAUhSNEJYaWR0Cy2MCCMP6JE2eJyq9UqZuythz7OjFkbNf2LOYpeGUcprCqEAvL8tF3ju71aZqXBL8jWIg96YeuJZj3ezLu2R6zoT6eNDuKuWiZYN3TZveXedY8z_k7xj3BlO2anx8ggjfgNaBgkV5UmgGVpGJ0ft4kux5DgqzBF6S8QXEJuZ4_kglR-ZKR8yikWXmn0ermpbRwcKVsGcYFAxkFj8oCyJwA5QjaVWmL08eUfueAz66crpoLq9YMLx7uy-bbp49311_am9vPX6_f37S6bldaJThVIKidBmysHns-CcGH0RJF8NBT2_UYU5gUNcJYQijXA5-MpaPh3CjKLpvX59yYwv0RcpEHVxdaV-UhHLMU3dgNRNC-km_-SdafJV0_DGxD-RnVKeScwMqY3EGlkyRYblVtcCe3GiQZJZPnqqoPn30uxP-2vH3E8hgqo7EVf_Uw2RL8fF9rkZPSP6xbQTJG66YjYb8AS2Wwtg</recordid><startdate>20100301</startdate><enddate>20100301</enddate><creator>魏斌 廖英杰 刘纪忠 路林 曹进 王军 张建华</creator><general>IOP Publishing</general><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope><scope>7TG</scope><scope>KL.</scope></search><sort><creationdate>20100301</creationdate><title>Dependence of charge trapping of fluorescent and phosphorescent dopants in organic light-emitting diodes on the dye species and current density</title><author>魏斌 廖英杰 刘纪忠 路林 曹进 王军 张建华</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c371t-a852ae82fb70dfc965b88579f1a10762f46002eba2d8df1125c75bdf29d55da23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Charge</topic><topic>Current density</topic><topic>Dyes</topic><topic>Electric charge</topic><topic>Electric fields</topic><topic>Emittance</topic><topic>Light-emitting diodes</topic><topic>Trapping</topic><topic>依赖性</topic><topic>掺杂剂</topic><topic>有机发光二极管</topic><topic>染料种类</topic><topic>电流密度</topic><topic>荧光灯</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>魏斌 廖英杰 刘纪忠 路林 曹进 王军 张建华</creatorcontrib><collection>中文科技期刊数据库</collection><collection>中文科技期刊数据库-CALIS站点</collection><collection>中文科技期刊数据库-7.0平台</collection><collection>中文科技期刊数据库-工程技术</collection><collection>中文科技期刊数据库- 镜像站点</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><jtitle>Chinese physics B</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>魏斌 廖英杰 刘纪忠 路林 曹进 王军 张建华</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Dependence of charge trapping of fluorescent and phosphorescent dopants in organic light-emitting diodes on the dye species and current density</atitle><jtitle>Chinese physics B</jtitle><addtitle>Chinese Physics</addtitle><date>2010-03-01</date><risdate>2010</risdate><volume>19</volume><issue>3</issue><spage>450</spage><epage>455</epage><pages>450-455</pages><issn>1674-1056</issn><eissn>2058-3834</eissn><abstract>This paper utilizes multilayer organic light-emitting diodes with a thin layer of dye molecules to study the mech- anism of charge trapping under different electric regimes. 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| fulltext | fulltext |
| identifier | ISSN: 1674-1056 |
| ispartof | Chinese physics B, 2010-03, Vol.19 (3), p.450-455 |
| issn | 1674-1056 2058-3834 |
| language | eng |
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| source | IOP Publishing Journals |
| subjects | Charge Current density Dyes Electric charge Electric fields Emittance Light-emitting diodes Trapping 依赖性 掺杂剂 有机发光二极管 染料种类 电流密度 荧光灯 |
| title | Dependence of charge trapping of fluorescent and phosphorescent dopants in organic light-emitting diodes on the dye species and current density |
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