A new pyridinium-substituted tetraphenylethylene aggregation induced emission composites for rare-earth free white light displays

In this work, we study the quantum efficiency and practicality of using a polymer infused with 1,4-bis(5-phenyl-2-oxazolyl) benzene (POPOP) and a newly synthesized aggregation induced luminophore (TPEPy-PF6) for the fabrication of light emitting diodes. By placing the polymer on a 365 nm chip we show that it is possible to get a white light-emitting diodes (LEDs) with an internal quantum efficiency of 53.33%. The coupling interactions among the components in the nanocomposites were investigated, however, Fo center dot rster Resonance Energy Transfer (FRET) was not observed between POPOP and TPEPy-PF6. A Fo center dot rster radius of 28 angstrom under 365 nm excitation wavelength was calculated, which proves the effective energy transfer from POPOP to TPEPy-PF6 would be difficult due to an extremely short Fo center dot rster radius. The absence of FRET makes it easy to adjust the concentration of the two luminophores to obtain optimized chromaticity for LED lighting and displays applications.