Switchable photovoltaic effect in bilayer graphene/BiFeO3/Pt heterostructures

被引：38

作者：

Katiyar, Rajesh K. ^{[1
]}

Misra, Pankaj

Mendoza, Frank

Morell, Gerardo

Katiyar, Ram S.

机构：

[1] Univ Puerto Rico, Dept Phys, San Juan, PR 00936 USA

来源：

APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 14期

关键词：

FERROELECTRIC BIFEO3; GRAPHENE;

D O I：

10.1063/1.4897627

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the switchable photovoltaic effects in graphene/BiFeO3/Pt heterostructures. Pure phase polycrystalline BiFeO3 films were deposited on Pt/TiO2/SiO2/Si substrates by pulse laser deposition. A bilayer graphene was transferred onto the BiFeO3 film which serves as transparent conducting electrodes. The heterostructures showed switchable photovoltaic effect depending on ferroelectric polarization directions indicating depolarization field induced separation of photo-generated carriers. The open circuit voltage (V-OC) and short circuit current density (J(SC)) were measured to be similar to 110 mV, similar to 92 mu A/cm(2) in positive polarity and similar values were obtained when the polarity was reversed. The J(SC) and V-OC also showed rapid response (<100 ms) as a function of light exposure time. (C) 2014 AIP Publishing LLC.

引用

页数：4

共 18 条

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