Color-Tunable White-Light Emitting Materials Based on Liquid-Filled Capsules and Thermally-Responsive Dyes

Vázquez-Mera, N. A.; Otaegui, J.; Sanchez, R.; Prats, G.; Guirado G.;, Ruiz-Molina, D.; Roscini, C.; Hernando, J.

ACS Appl. Mater. Interfaces, , , (2019)
DOI: 10.1021/acsami.9b02169

Abstract: Color-tunable white-light emitting materials are currently attracting much attention because of their potential applications in artificial lightning, sensing and imaging. However, preparation of these systems from organic emitters is often cumbersome due to the interchromophoric interactions occurring upon solvent drying in the final solid materials, which can be hardly predicted and may lead to detrimental effects. To circumvent these obstacles, we have developed a new fabrication methodology that relies on dye encapsulation within liquid-filled capsules, thus enabling direct transfer of the luminescent properties from solution to the solid state and, as such, rational design of miniaturized white-light emitting materials. By introducing a temperature-responsive chromophore into the capsules, these materials are further endowed with color tunability, which does not only allow ample modulation of the emitted color, but also facilitates external fine control of the system so as to ensure precise realization of white light.