However, both of these spectra contain emission lines that can't yet be matched with known electron transitions, limiting the information which can be gathered from them. In a study published in ...

This means that each electron transition will produce a photon of a different frequency and hence a different colour. This causes line emission spectra to be produced, as shown below. This is not ...

To do this, they measured the photoluminescence spectrum of a WS 2 sample ... the optical gain and amplified spontaneous emission originate from the electron-hole plasma state in the highly ...