SOLID-STATE RADIOLUMINESCENT LIGHTING

We have demonstrated novel types of tritium-powered, solid-phase radio luminescent (RL) light sources. These lights include: (1) all-organic formulations comprised of polystyrene and fluorescent organic dyes; (2 ) polydimethylsiloxane-based systems incorporating inorganic phosphors ; and (3) inorganic aerogel-based systems doped with phosphors. Three principal design considerations for these new RL lights are described. These include: (1) incorporation of tritium into the solid matrix; (2 ) molecular engineering to maximize light-output efficiency; and (3) s trategies for increasing longevity. The advanced RL lights, which are of interest due to potential advantages in efficiency, brightness and safety, are being developed for emergency lighting uses and for batter y and lighting applications in remote locations.