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Article: The role of ruthenium and rhenium diimine complexes in conjugated polymers that exhibit interesting opto-electronic properties

TitleThe role of ruthenium and rhenium diimine complexes in conjugated polymers that exhibit interesting opto-electronic properties
Authors
KeywordsLuminescence
N ligands
Rhenium
Ruthenium
Sensitizers
Issue Date2001
PublisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/chemistry
Citation
Chemistry - A European Journal, 2001, v. 7 n. 20, p. 4358-4367 How to Cite?
AbstractThis paper reports the synthesis and opto-electronic properties of different conjugated polymers that contain the diimine complexes of ruthenium or rhenium. Conjugated poly(phenylene vinylene)s that contain aromatic 1,3,4-oxadiazole and 2,2′-bipyridine units on the main chain were synthesized by the palladium catalyzed olefinic coupling reaction. Other types of polymers based on 1,10-phenanthroline bis(2,2-bipyridyl) ruthenium(II) or chlorotricarbonyl rhenium(I) complexes were also synthesized by the same reaction. In general, these polymers exhibit two absorption bands due to the π-π* transition of the conjugated main chain and the d-π* metal-to-ligand charge-transfer transition of the metal complex. As a result, the photosensitivity of the polymers beyond 500 nm was enhanced. Charge-carrier mobility measurements showed that the presence of metal complexes could facilitate the charge-transport process, and the enhancement in carrier mobility was dependent on the metal content in the polymer. In addition, we have also demonstrated that the ruthenium complex could act as both photosensitizer and light emitter. Photovoltaic cells were constructed, and they were subjected to irradiation with a xenon arc lamp. Under illumination, the short circuit current and the open circuit voltage were measured to be 0.05 mAcm-2 and 0.35 V, respectively. The polymers were fabricated into single-layer emitting devices, and light emission was observed when the device was subjected to forward bias. The maximum luminance was determined to be 300 cdm-2, and the external quantum efficiency was approximately 0.05 to 0.2%. Although the efficiency was relatively low when compared with other devices based on organic materials, we have demonstrated the first examples of using transition metal complexes for both photovoltaic and light-emitting applications.
Persistent Identifierhttp://hdl.handle.net/10722/70464
ISSN
2015 Impact Factor: 5.771
2015 SCImago Journal Rankings: 2.323
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorNg, PKen_HK
dc.contributor.authorGong, Xen_HK
dc.contributor.authorChan, SHen_HK
dc.contributor.authorLam, LSMen_HK
dc.contributor.authorChan, WKen_HK
dc.date.accessioned2010-09-06T06:23:07Z-
dc.date.available2010-09-06T06:23:07Z-
dc.date.issued2001en_HK
dc.identifier.citationChemistry - A European Journal, 2001, v. 7 n. 20, p. 4358-4367en_HK
dc.identifier.issn0947-6539en_HK
dc.identifier.urihttp://hdl.handle.net/10722/70464-
dc.description.abstractThis paper reports the synthesis and opto-electronic properties of different conjugated polymers that contain the diimine complexes of ruthenium or rhenium. Conjugated poly(phenylene vinylene)s that contain aromatic 1,3,4-oxadiazole and 2,2′-bipyridine units on the main chain were synthesized by the palladium catalyzed olefinic coupling reaction. Other types of polymers based on 1,10-phenanthroline bis(2,2-bipyridyl) ruthenium(II) or chlorotricarbonyl rhenium(I) complexes were also synthesized by the same reaction. In general, these polymers exhibit two absorption bands due to the π-π* transition of the conjugated main chain and the d-π* metal-to-ligand charge-transfer transition of the metal complex. As a result, the photosensitivity of the polymers beyond 500 nm was enhanced. Charge-carrier mobility measurements showed that the presence of metal complexes could facilitate the charge-transport process, and the enhancement in carrier mobility was dependent on the metal content in the polymer. In addition, we have also demonstrated that the ruthenium complex could act as both photosensitizer and light emitter. Photovoltaic cells were constructed, and they were subjected to irradiation with a xenon arc lamp. Under illumination, the short circuit current and the open circuit voltage were measured to be 0.05 mAcm-2 and 0.35 V, respectively. The polymers were fabricated into single-layer emitting devices, and light emission was observed when the device was subjected to forward bias. The maximum luminance was determined to be 300 cdm-2, and the external quantum efficiency was approximately 0.05 to 0.2%. Although the efficiency was relatively low when compared with other devices based on organic materials, we have demonstrated the first examples of using transition metal complexes for both photovoltaic and light-emitting applications.en_HK
dc.languageengen_HK
dc.publisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/chemistryen_HK
dc.relation.ispartofChemistry - A European Journalen_HK
dc.subjectLuminescenceen_HK
dc.subjectN ligandsen_HK
dc.subjectRheniumen_HK
dc.subjectRutheniumen_HK
dc.subjectSensitizersen_HK
dc.titleThe role of ruthenium and rhenium diimine complexes in conjugated polymers that exhibit interesting opto-electronic propertiesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0947-6539&volume=7&issue=20&spage=4358&epage=4367&date=2001&atitle=The+role+of+ruthenium+and+rhenium+diimine+complexes+in+conjugated+polymers+that+exhibit+interesting+opto-electronic+propertiesen_HK
dc.identifier.emailChan, WK:waichan@hku.hken_HK
dc.identifier.authorityChan, WK=rp00667en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/1521-3765(20011015)7:20<4358::AID-CHEM4358>3.0.CO;2-Men_HK
dc.identifier.pmid11695669en_HK
dc.identifier.scopuseid_2-s2.0-0035886803en_HK
dc.identifier.hkuros68393en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035886803&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume7en_HK
dc.identifier.issue20en_HK
dc.identifier.spage4358en_HK
dc.identifier.epage4367en_HK
dc.identifier.isiWOS:000171651500006-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridNg, PK=7201377071en_HK
dc.identifier.scopusauthoridGong, X=7201999272en_HK
dc.identifier.scopusauthoridChan, SH=7404254992en_HK
dc.identifier.scopusauthoridLam, LSM=7201984714en_HK
dc.identifier.scopusauthoridChan, WK=13310083000en_HK

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