中文Luminescence principle of upconversion luminescent materials
1. What is upconversion luminescence? Stokes law holds that materials can only be excited by high-energy light and emit low-energy light, that is, when excited by light with short wavelength and high frequency, materials emit light with long wavelength and low frequency. Up-conversion luminescence is the opposite. Up-conversion luminescence refers to the type of luminescence that continuously absorbs two or more photons, resulting in the emission wavelength being shorter than the excitation wavelength. We also call it Anti-Stokes. Up-conversion luminescence is...
