To further substantiate the light-harvesting abilities of doped Ni:PNC-RhB system, we have investigated their energy transfer dynamics in thin-film as well. The concentrations of acceptor, RhB have been kept relatively low to avoid unwarranted molecular aggregation. The photoluminescence of Ni:PNC drops dramatically even at 0.5 M of Rhodamine B. Thereafter, it follows a common trend observed for energy transfer-decrease in Ni:PNC emission with concurrent increase in RhB emission (Figure ). TRPL decays of Ni:PNC-RhB in thin films at 512 nm (exc = 405 nm) with gradual addition of acceptor (0-10 M) become faster (Figure , Table ). Rise-time in fluorescence decay of RhB again bolsters the efficient energy transfer from Ni:PNC (Figure , Table ). Rate of energy transfer in thin film is much faster than that in solution (Table ). It therefore suggests that Rhodamine B resides in close-proximity with Ni:PNC in thin-films owing to arrested diffusion.