Effect of end group functionalisation of small molecules featuring the fluorene-thiophene-benzothiadiazole motif as emitters in solution-processed red and orange organic light-emitting diodes
Effect of end group functionalisation of small molecules featuring the fluorene-thiophene-benzothiadiazole motif as emitters in solution-processed red and orange organic light-emitting diodes
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DOI：
10.1039/c8tc02993h
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发表时间：
2019-04-07
影响因子：
6.4
通讯作者：
Skabara, Peter J.
中科院分区：
文献类型：
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作者：
Fell, Valentin H. K.;Findlay, Neil J.;Skabara, Peter J.
沿着介绍了一系列红色荧光材料（化合物1-4）及其在溶液加工的OLED器件中的性能，所述红色荧光材料各自含有对称的芴-噻吩-BT-噻吩-芴核。相对于母体化合物1，通过用另外的芴单元封端（化合物2）或通过引入供体官能团（化合物3和4）来扩展分子共轭改善了OLED性能。值得注意的是，在化合物3中引入三苯胺供体基团导致溶液处理的OLED器件以2888 cd m（-2）的峰值亮度和低开启电压（3.6V）工作。
A series of red fluorescent materials (compounds 1-4), which each contain the symmetric fluorene-thiophene-BT-thiophene-fluorene core, is presented along with their performance in solution-processed OLED devices. Extending the molecular conjugation through end-capping with additional fluorene units (compound 2), or through incorporation of donor functionalities (compounds 3 and 4) improves OLED performance relative to the parent compound 1. Notably, incorporating triphenylamine donor groups in compound 3 led to solution-processed OLED devices operating with a peak luminance of 2888 cd m(-2) and a low turn-on voltage (3.6 V).