Highly efficient electroluminescence from a solution-processable thermally activated delayed fluorescence emitter
Highly efficient electroluminescence from a solution-processable thermally activated delayed fluorescence emitter
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DOI：
10.1063/1.4935237
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发表时间：
2015-11-02
影响因子：
4
通讯作者：
Kaji, Hironori
中科院分区：
文献类型：
--
作者：
Wada, Yoshimasa;Shizu, Katsuyuki;Kaji, Hironori
我们开发了一种适用于溶液处理有机电致发光二极管(OLED)的热激活延迟荧光发射体2，4，6-tris(4-(9，9-dimethylacridan-10-yl)phenyl)-1，3，5-triazine(3ACR-TRZ)。当3ACR-TRZ掺杂到4，4‘-双(咔唑-9-基)联苯(CBP)基质中16wt.%时，3ACR-TRZ的光致发光量子产率高达98%。16wt.%3ACR-TRZ：CBP薄膜的瞬时光致发光衰减测量证实，3ACR-TRZ薄膜具有高效的TADF，三线态-光转换效率为96%。这种高的转换效率使得3ACR-TRZ作为有机电致发光器件的发光掺杂剂具有很大的吸引力。利用3ACR-TRZ作为发射体，我们制备了溶液处理的OLED，其最大外量子效率为18.6%。(C)2015 AIP出版有限责任公司。
We developed a thermally activated delayed fluorescence (TADF) emitter, 2,4,6-tris(4-(9,9-dimethylacridan-10-yl)phenyl)-1,3,5-triazine (3ACR-TRZ), suitable for use in solution-processed organic light-emitting diodes (OLEDs). When doped into 4,4'-bis(carbazol-9-yl) biphenyl (CBP) host at 16 wt. %, 3ACR-TRZ showed a high photoluminescence quantum yield of 98%. Transient photoluminescence decay measurements of the 16 wt. % 3ACR-TRZ: CBP film confirmed that 3ACR-TRZ exhibits efficient TADF with a triplet-to-light conversion efficiency of 96%. This high conversion efficiency makes 3ACR-TRZ attractive as an emitting dopant in OLEDs. Using 3ACR-TRZ as an emitter, we fabricated a solution-processed OLED exhibiting a maximum external quantum efficiency of 18.6%. (C) 2015 AIP Publishing LLC.