Dual-responsive photonic multilayers in combination with a smartphone application as high-security anti-counterfeiting devices

•Dual-responsive one-dimensional (1D) photonic crystal (PC) multilayers were prepared.•The patterned 1D PC film (F1) exhibited color transitions and turn-on fluorescence.•F1 demonstrated a two-step security function in combination with a smartphone app.•F1 was used for high-security anti-counterfeiting labeling and information storage.