| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 175390 | Dyes and Pigments | 2016 | 10 Pages |
•A series of platinum complexes, Pt5P8, containing triphenylene unit were prepared and characterized.•Complex Pt6 exhibits a column phase evidenced by DSC, POM and XRD.•All of platinum complexes show intense emission both in solution and solid state.•Polarized white OLED with polarized ratio of 1.4 was achieved in Pt6-based device.
In this context, a series of platinum complexes containing a triphenylene unit, namely Pt5Pt8, was prepared and characterized. Platinum complex Pt6 shows a clearly column liquid crystalline property, confirmed by differential scanning calorimetry, polarized optical microscopy and X-ray diffraction. These platinum complexes only display monomolecular emission both in solution and in neat film, an effect attributed to the presence of carbazole as a bulky group disfavoring aggregation of the complexes. Hole mobilities in the range of 10−5–10−6 cm2 V−1 s−1 were obtained for the annealed platinum complexes films. It was found that the method to align the emissive layer has a crucial role on the performance of the devices. The first example of polarized phosphorescent white organic light-emitting diode (OLED) with polarized ratio of 1.4 was achieved in Pt6-based device. This research opens up a new aspect of phosphorescent metallomesogens application for polarized white light emission.
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