Electroluminescence and Photophysical Properties of Polyquinolines
The electroluminescence and photophysical properties of a series of 11 polyquinolines were investigated and used to explore the effects of molecular and supramolecular structures on the light-emitting properties of polymers. Thin films of the polyquinolines have photoluminescence quantum yields betw...
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Veröffentlicht in: | Macromolecules 1999-11, Vol.32 (22), p.7422-7429 |
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creator | Zhang, Xuejun Shetty, Ashok S Jenekhe, Samson A |
description | The electroluminescence and photophysical properties of a series of 11 polyquinolines were investigated and used to explore the effects of molecular and supramolecular structures on the light-emitting properties of polymers. Thin films of the polyquinolines have photoluminescence quantum yields between 2 and 30% and unusually long excited-state lifetimes of 2.4−5.2 ns. Electroluminescence colors spanning blue, green, yellow, orange, and red were obtained through regulation of the molecular and supramolecular structures of the excimer- and aggregate-forming polyquinolines. ITO/hole transport layer/polyquinoline/Al light-emitting diodes fabricated and evaluated in air had electroluminescence quantum efficiencies between 0.02 and 1% and luminance levels of up to 280 cd/m2 at a current density of 100 mA/cm2. The electroluminescence efficiency approximately scaled linearly with the photoluminescence quantum yield. Favorable reaction at the aluminum/polyquinoline interface is proposed to account for the efficient electron injection and device performance in spite of the large (1.5−1.9 eV) energetic barrier to electron injection. These results provide new insights into the design of efficient light-emitting polymer materials and devices for optoelectronic applications. |
doi_str_mv | 10.1021/ma990960+ |
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Thin films of the polyquinolines have photoluminescence quantum yields between 2 and 30% and unusually long excited-state lifetimes of 2.4−5.2 ns. Electroluminescence colors spanning blue, green, yellow, orange, and red were obtained through regulation of the molecular and supramolecular structures of the excimer- and aggregate-forming polyquinolines. ITO/hole transport layer/polyquinoline/Al light-emitting diodes fabricated and evaluated in air had electroluminescence quantum efficiencies between 0.02 and 1% and luminance levels of up to 280 cd/m2 at a current density of 100 mA/cm2. The electroluminescence efficiency approximately scaled linearly with the photoluminescence quantum yield. Favorable reaction at the aluminum/polyquinoline interface is proposed to account for the efficient electron injection and device performance in spite of the large (1.5−1.9 eV) energetic barrier to electron injection. These results provide new insights into the design of efficient light-emitting polymer materials and devices for optoelectronic applications.</description><identifier>ISSN: 0024-9297</identifier><identifier>EISSN: 1520-5835</identifier><identifier>DOI: 10.1021/ma990960+</identifier><identifier>CODEN: MAMOBX</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Applied sciences ; Electrical, magnetic and optical properties ; Electronics ; Exact sciences and technology ; Optoelectronic devices ; Organic polymers ; Physicochemistry of polymers ; Properties and characterization ; Semiconductor electronics. Microelectronics. Optoelectronics. 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Thin films of the polyquinolines have photoluminescence quantum yields between 2 and 30% and unusually long excited-state lifetimes of 2.4−5.2 ns. Electroluminescence colors spanning blue, green, yellow, orange, and red were obtained through regulation of the molecular and supramolecular structures of the excimer- and aggregate-forming polyquinolines. ITO/hole transport layer/polyquinoline/Al light-emitting diodes fabricated and evaluated in air had electroluminescence quantum efficiencies between 0.02 and 1% and luminance levels of up to 280 cd/m2 at a current density of 100 mA/cm2. The electroluminescence efficiency approximately scaled linearly with the photoluminescence quantum yield. Favorable reaction at the aluminum/polyquinoline interface is proposed to account for the efficient electron injection and device performance in spite of the large (1.5−1.9 eV) energetic barrier to electron injection. These results provide new insights into the design of efficient light-emitting polymer materials and devices for optoelectronic applications.</description><subject>Applied sciences</subject><subject>Electrical, magnetic and optical properties</subject><subject>Electronics</subject><subject>Exact sciences and technology</subject><subject>Optoelectronic devices</subject><subject>Organic polymers</subject><subject>Physicochemistry of polymers</subject><subject>Properties and characterization</subject><subject>Semiconductor electronics. Microelectronics. Optoelectronics. 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Microelectronics. Optoelectronics. Solid state devices</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhang, Xuejun</creatorcontrib><creatorcontrib>Shetty, Ashok S</creatorcontrib><creatorcontrib>Jenekhe, Samson A</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Macromolecules</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zhang, Xuejun</au><au>Shetty, Ashok S</au><au>Jenekhe, Samson A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Electroluminescence and Photophysical Properties of Polyquinolines</atitle><jtitle>Macromolecules</jtitle><addtitle>Macromolecules</addtitle><date>1999-11-02</date><risdate>1999</risdate><volume>32</volume><issue>22</issue><spage>7422</spage><epage>7429</epage><pages>7422-7429</pages><issn>0024-9297</issn><eissn>1520-5835</eissn><coden>MAMOBX</coden><abstract>The electroluminescence and photophysical properties of a series of 11 polyquinolines were investigated and used to explore the effects of molecular and supramolecular structures on the light-emitting properties of polymers. Thin films of the polyquinolines have photoluminescence quantum yields between 2 and 30% and unusually long excited-state lifetimes of 2.4−5.2 ns. Electroluminescence colors spanning blue, green, yellow, orange, and red were obtained through regulation of the molecular and supramolecular structures of the excimer- and aggregate-forming polyquinolines. ITO/hole transport layer/polyquinoline/Al light-emitting diodes fabricated and evaluated in air had electroluminescence quantum efficiencies between 0.02 and 1% and luminance levels of up to 280 cd/m2 at a current density of 100 mA/cm2. The electroluminescence efficiency approximately scaled linearly with the photoluminescence quantum yield. Favorable reaction at the aluminum/polyquinoline interface is proposed to account for the efficient electron injection and device performance in spite of the large (1.5−1.9 eV) energetic barrier to electron injection. These results provide new insights into the design of efficient light-emitting polymer materials and devices for optoelectronic applications.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><doi>10.1021/ma990960+</doi><tpages>8</tpages></addata></record> |
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subjects | Applied sciences Electrical, magnetic and optical properties Electronics Exact sciences and technology Optoelectronic devices Organic polymers Physicochemistry of polymers Properties and characterization Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices |
title | Electroluminescence and Photophysical Properties of Polyquinolines |
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