Photoluminescence

2020-09-07 09:56  下载量:7

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Photoluminescence (PL) spectroscopy is a widely used technique for the characterization of the optical and electronic properties of semiconductors and molecules. PL is a process of light emission from any form of matter after the absorption of photons. The incident photon in the visible region excites one of its electrons to the excited state. And then, it radiates a photon as the electron return to the lower energy state. In quantum mechanics, the energy band is quantized, which means only certain transitions are allowed. Therefore, the discontinued energy peaks of luminescence are expected.

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