Phosphorescent compounds in civil construction materials: functional applications

Compostos fosforescentes em materiais de construção civil: aplicações funcionais

Abstract

Abstract  This paper presents the development of a luminescent waterproofing membrane using strontium aluminate doped with europium and dysprosium (SrAl₂O₄:Eu²⁺,Dy³⁺), aimed at sustainable applications in signaling and energy efficiency in civil construction. Samples containing 20%, 30%, and 40% of phosphorescent powder were prepared and analyzed for workability, light emission, and physicochemical properties. The 40% sample showed the highest quantum yield (63%) and residual emission lasting up to 810 s, evidencing the role of Dy³⁺ ions in forming electronic traps and prolonging the emission. The increase in phosphorescent content compromised workability, requiring formulation adjustments. The results indicate the potential of the material for use in low-light environments, such as escape routes and safety signage.

Keywords:
phosphorescence; photoluminescence; strontium aluminate; civil construction; waterproofing membrane