The relationship between basic group resonance and quantum yield of high efficiency red light fluorescent solutions

Compared with rare earth elements and heavy metal elements, rare-earth-element-free fluorescent films can greatly reduce environmental hazards. In this study, we use a solution method to produce the fluorescent films. The film thickness is 10 mu m, which can maintain fluorescent light intensity in an environment with an average humidity of 55.1 (RH%) after encapsulation. We also find that the type of solvent affects the resonance position of the CN functional group in DCJTB at a wavenumber of 2196 (cm(-1)), measured with Fourier transform infrared spectroscopy. The functional group is affected by the polar effect with its displacement decreasing with the quantum yield. Finally, we successfully made a fluorescent solution with a resonance displacement of only 12.8 (cm(-1)) for the CN functional group with the quantum yield being as high as 81.3% and a fluorescent film with a quantum yield as high as 84.8%.

Automated summary

In this study, rare-earth-element-free fluorescent films were produced using a solution method, with a thickness of 10 μm and high quantum yields for both the fluorescent solution and film. The type of solvent was found to affect the resonance position of the CN functional group in DCJTB, with its displacement decreasing with quantum yield. These findings contribute to reducing environmental hazards and improving the efficiency of fluorescent materials.