Department of Chemistry; Institute of Advanced Material
New platinum(II) one-armed Schiff base complexes for blue and orange PHOLEDs applications
The condensation of different groups substituted salicylaldehydes with aniline and 2,4,5-trifluoroaniline, afforded five one-armed Schiff base ligands HL1, HL2, HL3, HL4 and HL5. And their platinum(II) complexes Pt(L1)2, Pt(L2)2, Pt(L3)2, Pt(L4)2, Pt(L5)2and PtL5·DMSO were prepared through the metallation of ligands with K2PtCl4. All ligands and complexes were characterized by 1H NMR, infrared spectroscopy, mass spectrometry and single crystal X-ray diffraction. And their thermal stability, photophysical properties, and electrochemical behaviors were investigated in detail. Using these complexes as phosphorescent emitting materials, blue to orange light-emitting devices were fabricated with moderate efficiencies. The maximum current efficiency, power efficiency, and brightness for the 3.0 wt % Pt(L3)2 doped OLED are 1.12 cd A−1, 0.62 l m W−1 and 1521 cd m−2, respectively. Given the synthetic simplicity and ease of structural variation, the results here indicate that these platinum(II) Schiff base complexes are good candidates for phosphorescent OLEDs.
Platinum complexes, Schiff base, PHOLEDs
Source Publication Title
© 2016 Elsevier B.V. All rights reserved.
This work was supported by the National Natural Science Foundation of China (No. 21501128, 21575097, 21375092, 21601142, 51403149), China Postdoctoral Science Foundation (No. 2014M560476) and Zhejiang Provincial Natural Science Foundation of China (No. LQ13B010001, LY15B030001). We also thank the Scientific Research Project of Hubei Provincial Department of Education (No. Q20161507), Scientific Research Founding of Wuhan Institute of Technology (No. K201542) and Science and Technology Plan Projects of Zhejiang Province (No.2015C33224, 2015C37034) for financial support. X. Zhu thanks the financial support from Hong Kong Baptist University (FRG1/15-16/052).
Link to Publisher's Edition
Zhang, J., Zhu, X., Zhong, A., Jia, W., Wu, F., Li, D., Tong, H., Wu, C., Tang, W., Zhao, P., Wang, L., & Han, D. (2017). New platinum(II) one-armed Schiff base complexes for blue and orange PHOLEDs applications. Organic Electronics, 42, 153-162. https://doi.org/10.1016/j.orgel.2016.12.024