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Issue 10, 2017
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Interface-engineered charge separation at selective electron tunneling heterointerfaces

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Abstract

The phenomena of charge/energy transfer commonly exist at most heterointerfaces. These processes vary with the change of the electronic structure at the interface, which leads to the diversity of device functionalities. Therefore, interface engineering is a powerful approach to control the charge/energy transfer behavior by modulating the interfacial electronic structure. On the basis of a novel ipsilateral selective electron tunneling (ISET) mechanism, we systematically investigated the charge transfer property at a semiconductor/graphene/photoactive material ternary interface. With acridine orange dye as the photoactive material, photoinduced electrons from the dye can directly tunnel across the TiO2/graphene Schottky barrier into the conductive band of TiO2, while the photoinduced holes were collected by graphene. These results demonstrate the capability of such an ISET-based ternary interface to achieve efficient charge transfer and separation, promising the fabrication of new types of photovoltaic and optoelectronic devices.

Graphical abstract: Interface-engineered charge separation at selective electron tunneling heterointerfaces

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Publication details

The article was received on 22 May 2017, accepted on 26 Jul 2017 and first published on 27 Jul 2017


Article type: Research Article
DOI: 10.1039/C7QM00230K
Citation: Mater. Chem. Front., 2017,1, 2125-2131
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    Interface-engineered charge separation at selective electron tunneling heterointerfaces

    C. Gu, C. Jia and X. Guo, Mater. Chem. Front., 2017, 1, 2125
    DOI: 10.1039/C7QM00230K

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