Generally, stable and robust RTP materials with high efficiency and long lifetime are required for practical applications. The commonly used matrices including PMMA and PVA are essentially non-luminescent and they serve merely as a rigid cage to restrict the movement of guest molecules and exclude water and oxygen. The potential host-guest energy transfer with the use of a luminescent matrix, like nylon, may provide an effective strategy to boost the generation of triplet excitons and thus increase the phosphorescence efficiency.