具有相同配体的Pt（II）与Ir（III）配合物的异常红移发射及其在高效OLED中的应用。

IF 6.4 1区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Frontiers Pub Date : 2025-10-15 DOI:10.1039/d5qi01849h

Wenping Liu, Shipan Xu, Xuyang Du, Yan An, Shengli Li, Xiaolong Yang, Jun Xi, Yousong Ding, Guijiang Zhou, Yuanhui Sun

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引用次数: 0

摘要

通常，与具有相同配体的Pt（II）配合物相比，Ir（III）配合物通常显示出更长的发射波长。在这项工作中，设计了一系列基于相同苯并噻吩配体的Pt（II）和Ir（III）配合物。实验结果表明，与Ir（III）配合物相比，Pt（II）配合物表现出红移发射。这是由于Pt（II）配合物具有较强的配体场和较低的T1能级。气相沉积制备的器件效率可达20.3%，效率滚降很小，在含噻吩及其相关结构的Ir（III）配合物中表现出优异的性能。此外，Pt（II）配合物的更宽光谱适合于白光器件的应用。

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Anomalous redshift emission in Pt(II) vs Ir(III) complexes with identical ligands and the application of these complexes in high-efficiency OLED.

Conventionally, Ir(III) complexes typically show longer emission wavelengths compared to their Pt(II) complexes with identical ligands. In this work, a series of Pt(II) and Ir(III) complexes based on identical benzothiophene ligands were designed. Experimental results demonstrate that the Pt(II) complexes exhibit red-shifted emission compared to the Ir(III) complexes. This is caused by the stronger ligand field and lower T1 energy level of the Pt(II) complexes. The device efficiency prepared by vapor deposition can reach up to 20.3% with very small efficiency roll-off, demonstrating superior performance among Ir(III) complexes bearing thiophene and related structures. Furthermore, the broader spectrum of Pt(II) complexes is suitable for the application of white light devices.

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