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(a) Schematic energy band diagram at a shallow GB before and after applying a positive pulse voltage on the Au contact and (b) the GB charge density obtained by curves as a function of quasi-Fermi level energy position defined by measurement.
The capacitance transient and corresponding charge transient at the GB after applying a pulse voltage on the Au contact. The inset is the calculated energy band diagrams at different times during charge transient.
Charge decay rate at the GB as a function of total charge density at different temperatures after filling GB states with a pulse voltage of .
The Arrhenius plots at different GB charge densities. The inset is the charge density of GB states and their capture cross sections as a function of energy level.
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