Figure 4 | Scientific Reports

Figure 4

From: Optical switching of defect charge states in 4H-SiC

Figure 4

Schematics of the charge conversion process for the neutral and positive states of the VSiVC defect. (a) VV0 to VV+ conversion involves two photons and an Auger process that release sufficient energy to ionize an electron from the defect. (b) The a 1 orbital of VV+ lies in the valence band. When an electron is excited from the continuum states in the valence band (or a 1 orbital, not shown) to the e orbital, the hole migrates away from the defect, converting the VSiVC center back to the neutral state.

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