Figure 7 | Scientific Reports

Figure 7

From: Tail state mediated conduction in zinc tin oxide thinfilm phototransistors under below bandgap optical excitation

Figure 7

(a) The extracted sub-bandgap defects/charging sites density as a function of VGFB (= VG − VFB) for 33ZTO and 50ZTO TFTs. (b) The extracted density of sub-bandgap states (DOS) versus energy with reference to the conduction band minima. The green dashed lines represent photoexcitation energy levels for the 33ZTO at UV, blue and green light excitations.

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