Photoluminescence enhancement in quantum-dot-polymer films with CO micropores through KHCO 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 CO micropores and scattering particles into QD-embedded photopolymerizable polymer films. CO micropores were generated by the decomposition of KHCO in the film. The CO micropores, along with the partially decomposed KHCO microparticles, act as a scattering medium that increases the photon absorbance and improves the PL intensity. The effect of KHCO 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 ℃. 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.