Homoleptic iridium complexes with dibenzothiophene sulfone and triphenylamine groups for orange polymer light-emitting diodes

Homoleptic iridium complexes with dibenzothiophene sulfone and triphenylamine groups for orange polymer light-emitting diodes
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用于橙色聚合物发光二极管的二苯并噻吩砜和三苯胺基团的均配铱配合物

DOI:
10.1016/j.optmat.2021.111072
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发表时间:
2021-05
期刊:
影响因子:
3.9
通讯作者:
Cai Mingzhong
Cai Mingzhong
中科院分区:
材料科学3区
文献类型:
--
作者:
Xu Jiarong;Wang Zhiping;Huang Yaoyao;Hu Sifan;Zhou Wenjing;Liu Jian;Liang Aihui;Cai Mingzhong

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设计并合成了两个新的含二苯并噻吩砜和三苯胺骨架的均配型橙子发光铱配合物(p-FSOPyTPA)3 Ir和(m-FSOPyTPA)3 Ir。用所合成的铱配合物制备了具有ITO/PEDOT:PSS/poly-TPD/EML/TPBI/Ba/Al单发射层结构的聚合物发光器件,两种铱配合物均表现出良好的热稳定性,其aTd> 430 °C。与(p-FSOPyTPA)3 Ir相比,(m-FSOPyTPA)3 Ir由于二苯并噻吩砜的配位位置不同而具有更好的热性能、电致发光性能和荧光性能。更重要的是,当铱配合物以4wt%掺杂到PVK/OXD-7基质中时,基于(m-FSOPyTPA)3 Ir的橙色发光PLED表现出最大发光效率(LE)为4.65 cd/A,最大外量子效率(EQE)为2.03%,并且国际照明委员会(CIE)坐标为(0.54,0.42)。我们的初步工作可以提供一个有前途的橙子发射体的候选人的发展,解决可加工的高效白色聚合物发光二极管。
We have designed and synthesized two new orange light-emitting homoleptic iridium complexes ((p-FSOPyTPA)3Ir and (m-FSOPyTPA)3Ir) containing dibenzothiophene sulfone and triphenylamine frameworks. Solution-processed polymer light-emitting devices (PLEDs) are also prepared using these as-synthesized iridium complexes with a single-emission-layer (SEL) structure of ITO/PEDOT:PSS/poly-TPD/EML/TPBI/Ba/Al. Both the iridium complexes exhibited good thermal stability with aTd> 430 °C. Compared to (p-FSOPyTPA)3Ir, (m-FSOPyTPA)3Ir displayed much better thermal, photophyscial and electroluminescent properties owing to the different coordinate positions of dibenzothiophene sulfone. More importantly, the orange-emitting PLEDs based on (m-FSOPyTPA)3Ir exhibited a maximum luminous efficiency (LE) of 4.65 cd/A, a maximum external quantum efficiency (EQE) of 2.03%, and the Commission Internationale de L'Eclairage (CIE) coordinates of (0.54, 0.42), when the iridium complex doped into a matrix of PVK/OXD-7with a concentration of 4 wt %. Our preliminary work could provide a promising orange emitters candidate for the development of solution-processable highly efficient white PLEDs.
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