We further demonstrated the utility of the RTP PVA film in radar scan mimicry, where the RTP film was coated on UV LEDs (The set up and related codes are shown in Figures and). The path tracking at a scan frequency of 5 s -1 of the UV-LED can be observed in the RTP afterglow (Figure , Videos S6 and S7). Finally, we demonstrate how the emission energy can be tuned by co-doping a terminal emitter within the TPA-CO2H/matrix composite. We thus explored the use of Rhodamine-6G (Rh6G) as a terminal emitter that can also engage in hydrogen bonding in 1 wt% TPA-CO2H doped films in PVA (Figure ) at differing doping ratios ranging from 1:100 to 20:100 (Rh6G:TPA-CO2H). As the doping ratio increases, steady-state PL spectra show an increase in the intensity of the Rh6G emission (Figure ). A similar scenario was recorded in the time-gated phosphorescence spectra (Figure ), where the intensity ratio between the Rh6G emission at 562 nm and the TPA-CO2H emission at 464 nm (I562/464) gradually increases as a function of the doping ratio (Figure ). The tPh at 464 nm decreases from 73 to 55 ms, while the lifetime of the afterglow from the Rh6G decreases from 63 to 40 ms (Figure ). The energy transfer from TPA-CO2H to Rh6G is reflected by the evolution of the Commission Internationale de l'Éclairage (CIE) coordinates (Figure ) and the afterglow color (Figure ). This demonstrates how multi-color afterglow composites can be produced.