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Article: Distinct electroluminescent properties of triphenylamine derivatives in blue organic light-emitting devices
Title | Distinct electroluminescent properties of triphenylamine derivatives in blue organic light-emitting devices |
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Authors | |
Issue Date | 2011 |
Publisher | Royal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/Publishing/Journals/jm/index.asp |
Citation | Journal Of Materials Chemistry, 2011, v. 21 n. 4, p. 1206-1211 How to Cite? |
Abstract | Two highly fluorescent triphenylamines (TPA) end-capped respectively with one and three pyrene arms, namely N,N-diphenyl-4-(pyren-1-yl)aniline (PyTPA) and 4,4′,4′′-trispyrenylphenylamine (TPyPA), have been designed, synthesized and applied as hole-transporting emitters in organic light-emitting devices (OLEDs). While the two compounds have similar chemical structures (the only difference being the number of pyrene arms), devices based on them show distinct electroluminescent characteristics. PyTPA-based devices exhibit intense deep-blue emission with Commission Internationale de L'Eclairage coordinates (CIE) of (0.14, 0.11); whilst TPyPA-based devices emit white light with CIE of (0.31, 0.35). It is considered that the three electron-donating pyrene arms in TPyPA increase its electron-donating ability, which facilitates exciplex formation with the electron-transporter. This gives rise to a yellow exciplex emission and thus shifts the electroluminescence from deep-blue to white. More importantly, both devices can operate at record-low driving voltages (<4V at 20 mA cm -2), indicating the TPA-cored emitters offer not only high luminance efficiencies, but also good hole-injection and transporting features. © 2011 The Royal Society of Chemistry. |
Persistent Identifier | http://hdl.handle.net/10722/168499 |
ISSN | 2013 Impact Factor: 6.626 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lai, SL | en_US |
dc.contributor.author | Tong, QX | en_US |
dc.contributor.author | Chan, MY | en_US |
dc.contributor.author | Ng, TW | en_US |
dc.contributor.author | Lo, MF | en_US |
dc.contributor.author | Lee, ST | en_US |
dc.contributor.author | Lee, CS | en_US |
dc.date.accessioned | 2012-10-08T03:19:40Z | - |
dc.date.available | 2012-10-08T03:19:40Z | - |
dc.date.issued | 2011 | en_US |
dc.identifier.citation | Journal Of Materials Chemistry, 2011, v. 21 n. 4, p. 1206-1211 | en_US |
dc.identifier.issn | 0959-9428 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/168499 | - |
dc.description.abstract | Two highly fluorescent triphenylamines (TPA) end-capped respectively with one and three pyrene arms, namely N,N-diphenyl-4-(pyren-1-yl)aniline (PyTPA) and 4,4′,4′′-trispyrenylphenylamine (TPyPA), have been designed, synthesized and applied as hole-transporting emitters in organic light-emitting devices (OLEDs). While the two compounds have similar chemical structures (the only difference being the number of pyrene arms), devices based on them show distinct electroluminescent characteristics. PyTPA-based devices exhibit intense deep-blue emission with Commission Internationale de L'Eclairage coordinates (CIE) of (0.14, 0.11); whilst TPyPA-based devices emit white light with CIE of (0.31, 0.35). It is considered that the three electron-donating pyrene arms in TPyPA increase its electron-donating ability, which facilitates exciplex formation with the electron-transporter. This gives rise to a yellow exciplex emission and thus shifts the electroluminescence from deep-blue to white. More importantly, both devices can operate at record-low driving voltages (<4V at 20 mA cm -2), indicating the TPA-cored emitters offer not only high luminance efficiencies, but also good hole-injection and transporting features. © 2011 The Royal Society of Chemistry. | en_US |
dc.language | eng | en_US |
dc.publisher | Royal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/Publishing/Journals/jm/index.asp | en_US |
dc.relation.ispartof | Journal of Materials Chemistry | en_US |
dc.title | Distinct electroluminescent properties of triphenylamine derivatives in blue organic light-emitting devices | en_US |
dc.type | Article | en_US |
dc.identifier.email | Chan, MY:chanmym@hku.hk | en_US |
dc.identifier.authority | Chan, MY=rp00666 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1039/c0jm02550j | en_US |
dc.identifier.scopus | eid_2-s2.0-78651410816 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-78651410816&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 21 | en_US |
dc.identifier.issue | 4 | en_US |
dc.identifier.spage | 1206 | en_US |
dc.identifier.epage | 1211 | en_US |
dc.identifier.isi | WOS:000286110400039 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Lai, SL=7402937153 | en_US |
dc.identifier.scopusauthorid | Tong, QX=17347054500 | en_US |
dc.identifier.scopusauthorid | Chan, MY=7402597725 | en_US |
dc.identifier.scopusauthorid | Ng, TW=24822626900 | en_US |
dc.identifier.scopusauthorid | Lo, MF=24332794500 | en_US |
dc.identifier.scopusauthorid | Lee, ST=35468613000 | en_US |
dc.identifier.scopusauthorid | Lee, CS=35364273600 | en_US |
dc.identifier.issnl | 0959-9428 | - |