Deep-red electrophosphorescence from a platinum(II)–porphyrin complex copolymerised with polyfluorene for efficient energy transfer and triplet harvesting

Abstract

A series of polyfluorene-based polymers with a range of weight percentages (w/w) of a platinum(II)-containing porphyrin, 5,15-dimesityl-10,20-diphenylporphyrinato platinum(II) (MPP(Pt)), were synthesised and incorporated into organic light-emitting diodes. All polymers showed emission predominantly in the red/NIR region with only those polymers with porphyrin w/w of less than 2% showing residual tails at wavelengths lower than 600 nm, indicating increased emission from the porphyrin as w/w increases. The 2% loading of MPP(Pt) gave the highest efficiency LED (0.48%) and light output (2630 mW/m²).

Keywords:

• conjugated polymer
• OLED
• triplet harvesting
• porphyrin
• fluorene

Acknowledgements

We thank the EC Seventh Framework Programmes (No. 264694 (GENIUS), N. 607585 (OSNIRO), N. 643238 (SYNCHRONICS)), the Royal Society and the EPSRC. F.C. gratefully acknowledges the Wolfson Foundation and the Royal Society for the award of a Wolfson-Royal Society Merit Award.

Disclosure Statement

No potential conflict of interest was reported by the author(s).

Supplemental data

Supplemental data for this article can be accessed 10.1080/21606099.2015.1047473.