Light Conversion Efficiency Enhancement of Modified Quantum Dot Films Integrated With Micro SiO2 Particles

Photoluminescence quantum dots (QDs) have been considered as a kind of promising light converting materials with high luminous efficiency, tunable spectrum, and narrow emission. However, the current light conversion efficiency (LCE) of QD films is at a relative low level, which will result in many problems, such as inferior luminous performance, severe self-heating, etc. To enhance the LCE of QD films, SiO₂ particles were doped into QD films by physical blending, for their remarkable light scattering effect. The LCE enhancement after adding SiO₂ particles were studied by experiments. Experimental results showed that the SiO₂ modified QD films improved the LCE up to 63.45%, which was 103.88% higher than conventional QD films. Besides, as the SiO₂ particles diameters increased, the optimal mass fractions of SiO₂ particles for top LCE would decrease.