Photoluminescence spectroscopy (PL) is a powerful optical method used for characterizing materials. PL can be used to find impurities and defects in silicon and group III-V element semiconductors, and to determine semiconductor band-gaps. A material absorbs light, creating an electron-hole pair; an electron from the valence band jumps to the conduction band leaving a hole . The photon emitted upon recombination corresponds to the energy-difference between the valence and conduction bands, and is hence lower in energy than the excitation photon.
Dual Mode Analog/Photon Counting PMT
Short Focal Length Triple Grating Imaging Spectrographs
如您有任何疑问，请在此留下详细需求或问题，我们将竭诚您服务。
