To mitigate the intermolecular interaction effect in the solid state (no hetero-and reduced homo-molecular interaction), 0.1 wt% doped films of the emitters in zeonex were studied. The PL spectra of these films show similar trends to those observed in solution, with dBr-tBu-DiKTa having a lPL at 456 nm, followed by Mes3-DiKTa at lPL of 464 nm and tBr-DiKTa at lPL of 470 nm (Figure ). With reduced scope for intermolecular interactions in these dilute films, these trends and absence of significant PL broadening help to verify that intermolecular interactions are the main source of spectral broadening in the 1 wt% mCP films. Lower loading in mCP films could not be pursued though, as the thin films with 1 wt% doping were already approaching the lower limits of emission signal sensitivity, in contrast to the much thicker polymeric zeonex films.