Journal
CHEMPHYSCHEM
Volume 24, Issue 5, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.202200791
Keywords
density functional calculations; photocatalysis; C3N4; phosphorene; heterojunctions
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We investigated the interface between carbon nitride (C3N4) and phosphorene nanosheets (P-ene) using Density Functional Theory (DFT) calculations. The formation of the interface is driven by Van der Waals forces. The thickness of P-ene nanosheets determines the band edges offsets and the separation of charge carriers. The system transitions from a nearly type-II to a type-I junction as the thickness of P-ene increases.
We investigate the interface between carbon nitride (C3N4) and phosphorene nanosheets (P-ene) by means of Density Functional Theory (DFT) calculations. C3N4/P-ene composites have been recently obtained experimentally showing excellent photoactivity. Our results indicate that the formation of the interface is a favorable process driven by Van der Waals forces. The thickness of P-ene nanosheets determines the band edges offsets and the charge carriers' separation. The system is predicted to pass from a nearly type-II to a type-I junction when the thickness of P-ene increases, and the conduction band offset is particularly sensitive. Last, we apply the Transfer Matrix Method to estimate the efficiency for charge carriers' migration as a function of the P-ene thickness.
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