Fine Control of Red–Green–Blue Photoluminescence in Zeolites Incorporated with Rare‐Earth Ions and a Photosensitizer

All the colors of the rainbow can be observed upon excitation of a zeolite crystal incorporated with varying quantities of Eu3+ and Tb3+ ions as well as a sensitizer molecule (benzophenone or 4-acetylbiphenyl) in its framework structure (see picture). The colors can be fine-tuned by varying the amounts of the three components as well as the excitation wavelength and temperature.