PL

Photoluminescence spectroscopy is a non-contact, nondestructive method of probing the electronic structure of materials. In essence, light is directed onto a sample, where it is absorbed and where a process called photo-excitation can occur. The photo-excitation causes the material to jump to a higher electronic state, and will then release energy, (photons) as it relaxes and returns to back to a lower energy level. The emission of light, or luminescence through this process is photoluminescence, PL.

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