Bipolar Gold(III) Complexes for Solution-Processable Organic Light-Emitting Devices with a Small Efficiency Roll-Off
A new class of bipolar alkynylgold(III) complexes containing triphenylamine and benzimidazole moieties has been synthesized, characterized, and applied as phosphorescent dopants in the fabrication of solution-processable organic light-emitting devices (OLEDs). The incorporation of methyl groups in...
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Veröffentlicht in: | Journal of the American Chemical Society 2014-12, Vol.136 (51), p.17861-17868 |
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container_issue | 51 |
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container_title | Journal of the American Chemical Society |
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creator | Tang, Man-Chung Tsang, Daniel Ping-Kuen Wong, Yi-Chun Chan, Mei-Yee Wong, Keith Man-Chung Yam, Vivian Wing-Wah |
description | A new class of bipolar alkynylgold(III) complexes containing triphenylamine and benzimidazole moieties has been synthesized, characterized, and applied as phosphorescent dopants in the fabrication of solution-processable organic light-emitting devices (OLEDs). The incorporation of methyl groups in the central phenyl unit has been found to rigidify the molecule to reduce nonradiative decay, yielding a high photoluminescence quantum yield of up to 75% in spin-coated thin films. In addition, the realization of highly efficient solution-processable OLEDs with an extremely small external quantum efficiency (EQE) roll-off has been demonstrated. At practical brightness level of 1000 cd m–2, the optimized devices exhibited a high EQE of up to 10.0% and an extremely small roll-off of less than 1%. |
doi_str_mv | 10.1021/ja510622x |
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The incorporation of methyl groups in the central phenyl unit has been found to rigidify the molecule to reduce nonradiative decay, yielding a high photoluminescence quantum yield of up to 75% in spin-coated thin films. In addition, the realization of highly efficient solution-processable OLEDs with an extremely small external quantum efficiency (EQE) roll-off has been demonstrated. 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Am. Chem. Soc</addtitle><date>2014-12-24</date><risdate>2014</risdate><volume>136</volume><issue>51</issue><spage>17861</spage><epage>17868</epage><pages>17861-17868</pages><issn>0002-7863</issn><eissn>1520-5126</eissn><abstract>A new class of bipolar alkynylgold(III) complexes containing triphenylamine and benzimidazole moieties has been synthesized, characterized, and applied as phosphorescent dopants in the fabrication of solution-processable organic light-emitting devices (OLEDs). The incorporation of methyl groups in the central phenyl unit has been found to rigidify the molecule to reduce nonradiative decay, yielding a high photoluminescence quantum yield of up to 75% in spin-coated thin films. In addition, the realization of highly efficient solution-processable OLEDs with an extremely small external quantum efficiency (EQE) roll-off has been demonstrated. At practical brightness level of 1000 cd m–2, the optimized devices exhibited a high EQE of up to 10.0% and an extremely small roll-off of less than 1%.</abstract><cop>United States</cop><pub>American Chemical Society</pub><pmid>25495053</pmid><doi>10.1021/ja510622x</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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title | Bipolar Gold(III) Complexes for Solution-Processable Organic Light-Emitting Devices with a Small Efficiency Roll-Off |
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