• • Achieved 86% visible-region transparency at a nanocrystal loading of ~78 wt% in a polyvinyl alcohol matrix, overcoming the traditional trade-off between transparency and luminescence intensity for high-loading films.
• • Orthogonal R/G/B luminescence realized via Tb3+, Eu3+, and Tm3+ doping in lanthanide fluoride nanocrystals, with a UV-selective epoxy resin absorber blocking 254-nm cross-excitation between Tb3+ and Eu3+ layers, enabling asymmetric dual-side emission.
• • The refractive index matching between polyvinyl alcohol and nanocrystals minimizes scattering, allowing high transparency even at high loading, a critical factor for practical transparent display applications.
• • Proof-of-concept full-color prototype demonstrated in real time, indicating potential for immersive display applications such as augmented reality and head-up displays.