Lanthanum oxyfluoride nanostructures prepared by modified sonochemical method and their use in the fields of optoelectronics and biotechnology

•Modified sonochemical method was used for the synthesis of LaOF: Dy3+.•Superstructure morphologies were obtained by tuning the experimental parameters.•CIE and CCT results exhibit that the compounds were useful in wLED’s.•Prepared compounds exhibited superior antibacterial and antifungal activities.•The optimized compound was effectively used for forensic applications.