Above 20% External Quantum Efficiency in Thermally Activated Delayed Fluorescence Device Using Furodipyridine-Type Host Materials
Above 20% External Quantum Efficiency in Thermally Activated Delayed Fluorescence Device Using Furodipyridine-Type Host Materials
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DOI：
10.1021/cm403358h
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发表时间：
2014-02-11
影响因子：
8.6
通讯作者：
Lee, Jun Yeob
中科院分区：
文献类型：
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作者：
Im, Yirang;Lee, Jun Yeob
利用呋喃二吡啶核心结构衍生的双极性主体材料3-（呋喃[2,3-b:5,4-b']吡啶-3-基）- n， n-二苯基苯胺（3TPAPFP），研制了量子效率在20%以上的高效绿色热激活延迟荧光器件。呋喃二吡啶基的3TPAPFP具有单线态和三重态能量，可以有效地向热激活的延迟荧光掺杂剂(4s,6s)-2,4,5,6-四（9h -咔唑-9-基）异苯二腈（4CzIPN）传递能量，并且具有平衡空穴和电子密度的双极电荷传输特性。使用掺杂4CzIPN的3TPAPFP主体，在极低的掺杂浓度为1%的情况下，实现了21.2%的高量子效率。
High efficiency green thermally activated delayed fluorescence device with a quantum efficiency above 20% was developed using a bipolar host material, 3-(furo[2,3-b:5,4-b']dipyridin-3-yl)-N,N-diphenylaniline (3TPAPFP), derived from furodipyridine core structure. The furodipyridine based 3TPAPFP showed a singlet and triplet energy for efficient energy transfer to thermally activated delayed fluorescent dopant, (4s,6s)-2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN), and bipolar charge transport properties for balanced hole and electron density. A high quantum efficiency of 21.2% was achieved in the fluorescent device using the 3TPAPFP host doped with 4CzIPN dopant at a very low doping concentration of 1%.