Photoluminescence enhancement in quantum-dot-polymer films with CO2 micropores through KHCO3 decomposition

Quantum-dot (QDs) polymer composite films, which are key components in recent display applications, require improved photoluminescence (PL) intensity and color conversion efficiency for better display quality and low power consumption. In this study, we developed a novel approach to improve the photoluminescence (PL) of quantum dot (QDs)-polymer nanocomposite films. This was achieved by incorporating CO2 micropores and scattering particles into QD-embedded photopolymerizable polymer films. CO2 micropores were generated by the decomposition of KHCO3 in the film. The CO2 micropores, along with the partially decomposed KHCO3 microparticles, act as a scattering medium that increases the photon absorbance and improves the PL intensity. The effect of KHCO3 annealing temperature on various optical properties is investigated, and it is found that a large number of uniform micropores are created in the film at an optimal temperature, 110 celcius. Compared to an ordinary QD-polymer film, the PL of the QD-hybrid-foamed polymer film increases by 4.2 times. This method is fast and economically efficient, and provides insights into the design of high-performance optoelectronic devices.

Automated summary

In this study, a novel method to enhance the photoluminescence (PL) of quantum dot (QDs)-polymer nanocomposite films was developed. This was achieved by incorporating CO2 micropores and scattering particles, which increased the photon absorbance and improved the PL intensity. The results showed that the PL of the QD-hybrid-foamed polymer film increased by 4.2 times compared to an ordinary QD-polymer film.