Fig. 7
From: Perovskite quantum dots modulating upconversion nanomaterials for cancer early detections
Characterization of UCNP@SiO2 + QDs (Br: I = 0.7: 0.3) materials. A Fluorescence spectrum of UCNP@SiO2 and absorption spectrum of separate of QDs (Br: I = 0.7: 0.3). B Schematic diagram of the relationship between the intensity of the corresponding luminescence peaks of UCNP@SiO2 + QDs with different concentrations of QDs (Br: I = 0.7: 0.3), the excitation light wavelength is 980 nm