Band Gap Tunable, Donor-Acceptor-Donor Charge-Transfer Heteroquinoid-Based Chromophores: Near Infrared Photoluminescence and Electroluminescence
Band Gap Tunable, Donor-Acceptor-Donor Charge-Transfer Heteroquinoid-Based Chromophores: Near Infrared Photoluminescence and Electroluminescence
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DOI：
10.1021/cm801911n
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发表时间：
2008-10-14
影响因子：
8.6
通讯作者：
Wang, Zhi Yuan
中科院分区：
文献类型：
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作者：
Qian, Gang;Dai, Bo;Wang, Zhi Yuan
合成了一系列基于苯并二噻二唑及其硒类似物的D-pi-A-pi-D型近红外（NIR）荧光化合物，并通过H-1和C-13 NMR、高分辨质谱和元素分析进行了表征。研究了其吸收、荧光和电化学性质。这些发色团的光致发光范围从900到1600 nm，并且它们的带隙在1.19和0.56 eV之间。用硒代替硫可以导致发射的红移，并进一步减小带隙。有趣的是，化合物1在固态下表现出聚集诱导的发射增强效应。制备了基于M1和M2的全有机电致发光器件，观察到1 μ m以上的排他性近红外发射，外量子效率为0.05%，最大辐射亮度为60 mW Sr-1 m（-2）。最长电致发光波长达到1115 nm。
A series of D-pi-A-pi-D type of near-infrared (NIR) fluorescent compounds based on benzobis(thia diazole) and its selenium analogues were synthesized and fully characterized by H-1 and C-13 NMR, high-resolution mass spectrometry, and elemental analysis. The absorption fluorescence, and electrochemical properties were also studied. Photoluminescence of these chromophores ranges from 900 to 1600 nm and their band gaps are between 1.19 and 0.56 eV. Replacing the sulfur by selenium can lead to a red shift for emission and reduce the band gaps further. Interestingly, compound 1 exhibits aggregation-induced emission enhancement effect in the solid state. All-organic light-emitting diodes based on M1 and M2 were made and exclusive NIR emissions above 1 mu m with external quantum efficiency of 0.05% and maximum radiance of 60 mW Sr-1 m(-2) were observed. The longest electroluminesence wavelength reaches 1115 nm.