Achieving NIR emission for tetradentate platinum (II) salophen complexes by attaching dual donor-accepter frameworks in the heads of salophen
Dyes and Pigments, ISSN: 0143-7208, Vol: 138, Page: 100-106
2017
- 23Citations
- 19Captures
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Article Description
Two novel tetradentate platinum (II) salophen complexes A and B, respectively substituted by dual donor-accepter frameworks of phenazine-triphenylamine in the heads and waists of salophen, were synthesized and characterized. By changing the substituted positions of dual phenazine-triphenylamine units, different optophysical, electrochemical and electroluminescent properties were remarkably observed for the both platinum (II) salophen complexes. Using a blend of poly(vinyl-carbazole) (PVK) and 1,3-bis(5-(4-( tert -butyl) phenyl)-1,3,4-oxadiazol-2-yl)benzene (OXD-7) as host matrix, the platinum (II) salophen complexes A and B exhibited a deep red emission at 653 nm and a near-infrared (NIR) emission at 695 nm in the single-emissive-layer polymer light-emitting devices, respectively. The maximum external quantum efficiency ( EQE ) of 1.36% and highest radiant intensity ( R ) of 45 μ W cm −2 were obtained in the complex B-doped devices, which are 13.6 and 2.6 times of those corresponding values in the complex A-doped devices. It indicates that appending dual donor-accepter frameworks in the heads of salophen is an efficient strategy to achieve NIR emission for their tetradentate platinum (II) complexes.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0143720816312311; http://dx.doi.org/10.1016/j.dyepig.2016.11.034; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84998854167&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0143720816312311; https://dx.doi.org/10.1016/j.dyepig.2016.11.034
Elsevier BV
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