Simple Tuning of the Optoelectronic Properties of IrIII and PtII Electrophosphors Based on Linkage Isomer Formation with a Naphthylthiazolyl Moiety
Simple Tuning of the Optoelectronic Properties of IrIII and PtII Electrophosphors Based on Linkage Isomer Formation with a Naphthylthiazolyl Moiety
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基于与萘基噻唑基部分形成连接异构体的 IrIII 和 PtII 电致磷光体光电特性的简单调节
DOI：
10.1002/ejic.201200064
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发表时间：
2012-05
期刊：
影响因子：
--
通讯作者：
Zhaoxin Wu
中科院分区：
文献类型：
--
作者：
Xianbin Xu;Xiang Zhao;Yongbiao Zhao;Jingshuang Dang;Xiaolong Yang;Guijiang Zhou;Dongge Ma;Lixiang Wang;Wai-Yeung Wong;Zhaoxin Wu
通过调节萘系中噻唑基的取代位置（α或β位），这些功能配体的独特电子结构对IrIII和PtII两个系列磷光发光体的化学物理行为和电致发光（EL）性能都有很大的影响.光致发光波长可红移约100 nm。在IrIII磷光体的均配系列中，当用其α-取代的对应物取代β-取代的噻唑基基配体时，对于键合异构体，此外，向红效应可以多达约100%。42 nm的混配IrIII磷光体和ca. 59 nm的PtII化合物。类似地，带有β-取代的配体的金属磷光体相对于其具有α-取代的配体的键合异构体的EL性能表现出不同的EL性能。最好的EL结果与三重态发射体螯合与β-取代的配体显示最大亮度（Lmax）为22563 cd？m2，外量子效率（？ext）为12.88？%，亮度效率（？L）的30.84 cd？A1，功率效率（？p）为26.17 lm？W1，而它们的a-同行的EL性能的特征是峰值Lmax为8653 cd？m2，？6.18%的延伸率，? 8.55 cd？A1、？p = 6.54 lm？W1。噻唑基由于其独特的电子结构，可以很好地取代吡啶基，提高金属荧光体的电致发光性能。我们还展示了一个简单而有用的路线，以调整的功能特性的环化三重态发光体的EL应用。
By tuning the substitution position of a thiazolyl group on the naphthalene system (a or beta site), the distinctive electronic structures associated with these functional ligands have a substantial influence on both the photophysical behavior and electroluminescent (EL) performance of the resulting linkage isomers for two series of IrIII and PtII phosphorescent emitters. The photoluminescence wavelength can be redshifted by ca. 23 nm for the linkage isomers upon replacing the beta-substituted thiazolyl-based ligand with its a-substituted counterpart in the homoleptic series of IrIII phosphors. Furthermore, the bathochromic effect can be as much as ca. 42 nm for the heteroleptic IrIII phosphors and ca. 59 nm for the PtII compounds. Similarly, metallophosphors that bear beta-substituted ligands exhibit a different EL performance with respect to that of their linkage isomers with a-substituted ligands. The best EL results associated with the triplet emitters chelated with beta-substituted ligands show a maximum brightness (Lmax) of 22563 cd?m2, an external quantum efficiency (?ext) of 12.88?%, a luminance efficiency (?L) of 30.84 cd?A1, and a power efficiency (?p) of 26.17 lm?W1, whereas the EL performance of their a-counterparts was characterized by a peak Lmax of 8653 cd?m2, ?ext of 6.18?%, ?L of 8.55 cd?A1, and ?p of 6.54 lm?W1. Owing to its unique electronic structure, the thiazolyl group is a good alternative to the pyridyl moiety to improve the EL performance of the metallophosphor. We have also demonstrated a simple and useful route to tune the functional properties of cyclometalated triplet emitters for EL applications.
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影响因子：
46.2
作者：
Hongbin Wu;Lei Ying;Wei Yang;Yong Cao
通讯作者：
Hongbin Wu;Lei Ying;Wei Yang;Yong Cao
影响因子：
19
作者：
Chuluo Yang;Xiaowei Zhang;Han You;Lingyun Zhu;Lianqing Chen;Linna Zhu;Y. Tao;Dongge Ma;
通讯作者：
Chuluo Yang;Xiaowei Zhang;Han You;Lingyun Zhu;Lianqing Chen;Linna Zhu;Y. Tao;Dongge Ma;
影响因子：
2.3
作者：
Guijiang Zhou;Xingwu Wang;W. Wong;Xiaoming Yu;H. Kwok;Zhenyang Lin
通讯作者：
Guijiang Zhou;Xingwu Wang;W. Wong;Xiaoming Yu;H. Kwok;Zhenyang Lin
影响因子：
19
作者：
R. N. Bera;N. Cumpstey;P. Burn;I. Samuel
通讯作者：
R. N. Bera;N. Cumpstey;P. Burn;I. Samuel
影响因子：
2.3
作者：
Jung, SG;Kang, YJ;Kwon, SK
通讯作者：
Kwon, SK