Blue-green electroluminescence in copolymer based on poly(1,4-phenylene ethynylene)

Optical characteristics of poly(2,5-dialkoxy-1,4-phenylene diethynylene- co -2,5-pyridinylene) (ROPPE-Py) were investigated. Intense blue-green electroluminescence (EL) emission was observed in light emitting diode (LED) with Al/ROPPE-Py/indium-tin-oxide (ITO) structure. This result suggests that tr...

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Veröffentlicht in:	Japanese Journal of Applied Physics 1996, Vol.35 (2B), p.L251-L253
Hauptverfasser:	TADA, K, ONODA, M, HIROHATA, M, KAWAI, T, YOSHINO, K
Format:	Artikel
Sprache:	eng
Schlagworte:	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
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container_end_page	L253
container_issue	2B
container_start_page	L251
container_title	Japanese Journal of Applied Physics
container_volume	35
creator	TADA, K ONODA, M HIROHATA, M KAWAI, T YOSHINO, K
description	Optical characteristics of poly(2,5-dialkoxy-1,4-phenylene diethynylene- co -2,5-pyridinylene) (ROPPE-Py) were investigated. Intense blue-green electroluminescence (EL) emission was observed in light emitting diode (LED) with Al/ROPPE-Py/indium-tin-oxide (ITO) structure. This result suggests that triple bonds in the main chain are resopnsible for the blue shift and enhancement of EL, due to the shortening the effective conjugation length and effective confinement of excitons or exciton-polarons. However, the effects of triple bonds were suppressed by the introduction of electron-rich moieties in the main chain such as poly(2,5-dialkoxy-1,4-phenylene diethynylene- co -9,10-anthracenylene) (ROPPE-An). Electronic energy structures obtained from optical absorption spectra and cyclicvoltammetry measurements confirmed the effect of the electron-rich moieties, which is due to the delocalization of π-electrons and the enhancement of interchain interactions.
doi_str_mv	10.1143/JJAP.35.L251
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Intense blue-green electroluminescence (EL) emission was observed in light emitting diode (LED) with Al/ROPPE-Py/indium-tin-oxide (ITO) structure. This result suggests that triple bonds in the main chain are resopnsible for the blue shift and enhancement of EL, due to the shortening the effective conjugation length and effective confinement of excitons or exciton-polarons. However, the effects of triple bonds were suppressed by the introduction of electron-rich moieties in the main chain such as poly(2,5-dialkoxy-1,4-phenylene diethynylene- co -9,10-anthracenylene) (ROPPE-An). 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Intense blue-green electroluminescence (EL) emission was observed in light emitting diode (LED) with Al/ROPPE-Py/indium-tin-oxide (ITO) structure. This result suggests that triple bonds in the main chain are resopnsible for the blue shift and enhancement of EL, due to the shortening the effective conjugation length and effective confinement of excitons or exciton-polarons. However, the effects of triple bonds were suppressed by the introduction of electron-rich moieties in the main chain such as poly(2,5-dialkoxy-1,4-phenylene diethynylene- co -9,10-anthracenylene) (ROPPE-An). Electronic energy structures obtained from optical absorption spectra and cyclicvoltammetry measurements confirmed the effect of the electron-rich moieties, which is due to the delocalization of π-electrons and the enhancement of interchain interactions.</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>TADA, K</creatorcontrib><creatorcontrib>ONODA, M</creatorcontrib><creatorcontrib>HIROHATA, M</creatorcontrib><creatorcontrib>KAWAI, T</creatorcontrib><creatorcontrib>YOSHINO, K</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Japanese Journal of Applied Physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>TADA, K</au><au>ONODA, M</au><au>HIROHATA, M</au><au>KAWAI, T</au><au>YOSHINO, K</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Blue-green electroluminescence in copolymer based on poly(1,4-phenylene ethynylene)</atitle><jtitle>Japanese Journal of Applied Physics</jtitle><date>1996</date><risdate>1996</risdate><volume>35</volume><issue>2B</issue><spage>L251</spage><epage>L253</epage><pages>L251-L253</pages><issn>0021-4922</issn><eissn>1347-4065</eissn><coden>JJAPA5</coden><abstract>Optical characteristics of poly(2,5-dialkoxy-1,4-phenylene diethynylene- co -2,5-pyridinylene) (ROPPE-Py) were investigated. Intense blue-green electroluminescence (EL) emission was observed in light emitting diode (LED) with Al/ROPPE-Py/indium-tin-oxide (ITO) structure. This result suggests that triple bonds in the main chain are resopnsible for the blue shift and enhancement of EL, due to the shortening the effective conjugation length and effective confinement of excitons or exciton-polarons. However, the effects of triple bonds were suppressed by the introduction of electron-rich moieties in the main chain such as poly(2,5-dialkoxy-1,4-phenylene diethynylene- co -9,10-anthracenylene) (ROPPE-An). Electronic energy structures obtained from optical absorption spectra and cyclicvoltammetry measurements confirmed the effect of the electron-rich moieties, which is due to the delocalization of π-electrons and the enhancement of interchain interactions.</abstract><cop>Tokyo</cop><pub>Japanese journal of applied physics</pub><doi>10.1143/JJAP.35.L251</doi></addata></record>
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source	IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link
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	Blue-green electroluminescence in copolymer based on poly(1,4-phenylene ethynylene)
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