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首页> 外文期刊>Advanced Functional Materials >2,5-Functionalized Spiro-Bisiloles as Highly Efficient Yellow-Light Emitters in Electroluminescent Devices
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2,5-Functionalized Spiro-Bisiloles as Highly Efficient Yellow-Light Emitters in Electroluminescent Devices

机译：2,5-功能化螺双硅氧烷作为电致发光器件中的高效黄光发射器

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摘要

New spiro-bisilole molecules functionalized with nitrogen-containing heterocyclic groups including 7-azaindolyl, indolyl, and 2,2'-dipyridylamino have been synthesized. These molecules are found to display good chemical and thermal stability. They are luminescent in solution and in the solid state with an emission color ranging from blue-green to yellow, depending on the functional group. In the solid state, they display high photoluminescence quantum efficiency (32-40%). The electroluminescence properties for one of the new molecules, 2,3,3',4,4',5-hexaphenyl-2',5'-bis(p-2,2'-dipyridylaminophenyl)spiro-bisilole, have been investigated by fabricating single-layer and double-layer electroluminescent devices. The double-layer device, in which N,N'-bis(1-naphthyl)-N,N'-diphenylbenzidine acts as the hole-transport layer and the funetionalized spiro-bisilole functions as the emitter (emission wavelength = 566 nm) and the electron-transport layer, displays a brightness of 8440 cd m~(-2) at 9 V with a current efficiency of 1.71 cd A~(-1). No evidence of exiplex emission is observed.
机译：已经合成了用含氮杂环基团（包括7-氮杂吲哚基，吲哚基和2,2'-二吡啶基氨基）官能化的新型螺二环分子。发现这些分子显示出良好的化学和热稳定性。它们在溶液中呈固态发光，根据官能团的不同，发光颜色从蓝绿色到黄色。在固态时，它们显示出高的光致发光量子效率（32-40％）。研究了一种新分子2,3,3'，4,4'，5-六苯基-2'，5'-双（p-2,2'-二吡啶基氨基苯基）螺-双硅烷的电致发光特性通过制造单层和双层电致发光器件。双层器件，其中N，N'-双（1-萘基）-N，N'-二苯基联苯胺用作空穴传输层，功能化的螺-双硅烷分子用作发射极（发射波长= 566 nm）电子传输层在9 V电压下显示的亮度为8440 cd m〜（-2），电流效率为1.71 cd A〜（-1）。没有观察到激态发射的证据。

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