Light-Emitting Electrochemical Cells and Solution-Processed Organic Light-Emitting Diodes Using Small Molecule Organic Thermally Activated Delayed Fluorescence Emitters
Light-Emitting Electrochemical Cells and Solution-Processed Organic Light-Emitting Diodes Using Small Molecule Organic Thermally Activated Delayed Fluorescence Emitters
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DOI：
10.1021/acs.chemmater.5b03245
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发表时间：
2015-09
影响因子：
8.6
通讯作者：
M. Wong;G. Hedley;Guohua Xie;L. S. Kölln;I. Samuel;Antonio Pertegás;H. Bolink;E. Zysman‐Colman
中科院分区：
文献类型：
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作者：
M. Wong;G. Hedley;Guohua Xie;L. S. Kölln;I. Samuel;Antonio Pertegás;H. Bolink;E. Zysman‐Colman
合成了两种新型带电有机热激活延迟荧光(TADF)发射体1和2。它们的发射(纳秒和微秒分量)的多指数衰减和光致发光量子产率与氧的依赖关系很好地支持了它们的TADF行为。旋涂电致发光器件已经被制造成发光电化学电池(LEEC)和有机发光二极管(OLED)。报道了第一个非掺杂带电有机小分子LEEC的例子，在使用2的情况下，其外量子效率(EQE)为0.39%。采用多层结构，以NEAT-2为发光层的溶液处理OLED器件的EQE为5.1%，是迄今为止报道的非掺杂溶液处理小分子有机TADF OLED的最高外量子效率。这些有希望的结果为开发低成本的TADF LEEC开辟了发光材料的新领域。
Two novel charged organic thermally activated delayed fluorescence (TADF) emitters, 1 and 2, have been synthesized. Their TADF behavior is well-supported by the multiexponential decay of their emission (nanosecond and microsecond components) and the oxygen dependence of the photoluminescence quantum yields. Spin-coated electroluminescent devices have been fabricated to make light-emitting electrochemical cells (LEECs) and organic light-emitting diodes (OLEDs). The first example of a non-doped charged small organic molecule LEEC is reported and exhibited an external quantum efficiency (EQE) of 0.39% using 2. With a multilayer architecture, a solution-processed OLED device using neat 2 as the emitting layer gave an EQE of 5.1%, the highest reported to date for a nondoped solution-processed small molecule organic TADF OLED. These promising results open up a new area in light-emitting materials for the development of low-cost TADF LEECs.