以苯并[ d ]噻唑衍生物为主要配体的四种铱（iii）配合物的高效黄色电致发光<a href="#fn1" title="Electronic supplementary information (ESI) available: 1H, 19F and 31P NMR spectra and mass spectrometry of ligands and iridium complexes. The crystallographic data and selected bonds and angles of complexes (bt)2Ir(tpip), (fbt)2Ir(tpip) and (dfbt)2Ir(tpip). TGA curves, frontier orbital energy and electron density distribution of complexes (bt)2Ir(tpip), (fbt)2Ir(tpip), (cf3bt)2Ir(tpip) and (dfbt)2Ir(tpip). CCDC 1832345–1832347. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c8dt01479e">†</a><a href="#fn1" title="可用电子补充信息（ESI）：1H，19F和31P NMR光谱以及配体和铱配合物的质谱。晶体学数据以及配合物（bt）2Ir（tpip），（fbt）2Ir（tpip）和（dfbt）2Ir（tpip）的选定键和角度。 TGA曲线，配合物（bt）2Ir（tpip），（fbt）2Ir（tpip），（cf3bt）2Ir（tpip）和（dfbt）2Ir（tpip）的前沿轨道能量和电子密度分布。 CCDC 1832345–1832347。有关CIF或其他电子格式的ESI和晶体学数据，请参见DOI：10.1039 / c8dt01479e"></a>,Dalton Transactions

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以苯并[ d ]噻唑衍生物为主要配体的四种铱（iii）配合物的高效黄色电致发光 †
Dalton Transactions ( IF 3.5 ) Pub Date : 2018-05-21 00:00:00 , DOI: 10.1039/c8dt01479e
Zhi-Gang Niu _{1,

2,

3,

4,

5} , Jun Chen _{1,

2,

3,

4,

5} , Peng Tan _{6,

7,

8,

9} , Wei Sun _{6,

7,

8,

9} , You-Xuan Zheng _{1,

2,

3,

4,

5} , Gao-Nan Li _{6,

7,

8,

9} , Jing-Lin Zuo _{1,

2,

3,

4,

5}

Affiliation

四个双环金属化铱（III）配合物，（bt）₂ Ir（tpip），（fbt）₂ Ir（tpip），（cf ₃ bt）₂ Ir（tpip）和（dfbt）₂ Ir（tpip）（bt = 2-苯基苯并[ d ]噻唑，fbt = 6-氟-2-苯基苯并[ d ]噻唑，cf ₃ bt = 2-苯基-6-（三氟甲基）苯并[ d ]噻唑，dfbt = 5,7-二氟-2已经合成并研究了-苯基苯并[ d ]噻唑，tpip =四苯基亚氨基二次膦酸酯。所有配合物均在564-574 nm处发出黄光峰，且具有量子效率（Φ _EM）的27.1-48.4％，而在脱气CH的2.40-2.81微秒激发态寿命₂氯₂在室温下的解决方案。相应地，使用这些配合物作为发射体的有机发光二极管（OLED）实现了具有良好器件特性的黄色电致磷光。由于其光致发光最高量子产率（48.4％），基于所述设备（DFBT）₂的Ir（TPIP）显示具有的最大电流效率的最佳器件性能（η _C，最大可达的），以69.8光盘^-1和最大外部量子效率（EQE _max）高达24.3％。此外，所有器件均显示出较低的效率滚降率。对于四个器件，在1000 cd m ^-2的亮度下，EQE仍然可以保持在17.7％，16.4％，18.3％和20.6％。这些结果表明，这些材料在高效OLED中具有潜在的应用。

"点击查看英文标题和摘要"

Efficient yellow electroluminescence of four iridium(iii) complexes with benzo[d]thiazole derivatives as main ligands†

Four bis-cyclometalated iridium(III) complexes, (bt)₂Ir(tpip), (fbt)₂Ir(tpip), (cf₃bt)₂Ir(tpip) and (dfbt)₂Ir(tpip) (bt = 2-phenylbenzo[d]thiazole, fbt = 6-fluoro-2-phenylbenzo[d]thiazole, cf₃bt = 2-phenyl-6-(trifluoromethyl)benzo[d]thiazole, dfbt = 5,7-difluoro-2-phenylbenzo[d]thiazole, tpip = tetraphenylimidodiphosphinate) have been synthesized and investigated. All complexes emit yellow light peaks at 564–574 nm with quantum efficiencies (Φ_em) of 27.1–48.4% and excited state lifetimes of 2.40–2.81 μs in degassed CH₂Cl₂ solution at room temperature. Correspondingly, organic light-emitting diodes (OLEDs) using these complexes as emitters achieve yellow electrophosphorescence with good device characteristics. Due to its highest photoluminescence quantum yield (48.4%), the device based on (dfbt)₂Ir(tpip) displays the best device performance with a maximum current efficiency (η_{c, max}) of up to 69.8 cd A⁻¹ and a maximum external quantum efficiency (EQE_max) of up to 24.3%. Furthermore, all devices showed low efficiency roll-off ratios. The EQE could still be retained at 17.7%, 16.4%, 18.3% and 20.6% for four devices at a luminance of 1000 cd m⁻². These results suggest that these materials have potential application in efficient OLEDs.

更新日期：2018-05-21

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