Bulk photovoltaic effect at infrared wavelength in strained Bi2Te3 films | Zendy

Yucong Liu | Zendy; Jiadong Chen | Zendy; Chao Wang | Zendy; Huiyong Deng | Zendy; DaMing Zhu | Zendy; Gujin Hu | Zendy; Xiaohong Chen | Zendy; Ning Dai | Zendy

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Bulk photovoltaic effect at infrared wavelength in strained Bi₂Te₃ films

Author(s) -

Yucong Liu,

Jiadong Chen,

Chao Wang,

Huiyong Deng,

DaMing Zhu,

Gujin Hu,

Xiaohong Chen,

Ning Dai

Publication year - 2016

Publication title -

apl materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.571

H-Index - 60

ISSN - 2166-532X

DOI - 10.1063/1.4971798

Subject(s) - materials science , topological insulator , infrared , anomalous photovoltaic effect , photovoltaic system , thermoelectric effect , ferroelectricity , band gap , optoelectronics , photovoltaic effect , wavelength , semimetal , condensed matter physics , optics , dielectric , physics , thermodynamics , ecology , biology

As a prominent three-dimensional (3-D) topological insulator, traditional thermoelectric material Bi2Te3 has re-attracted greater interest in recent years. Herein, we demonstrate for the first time that c-axis oriented strained Bi2Te3 films exhibit the bulk photovoltaic effect (BPVE) at infrared wavelengths, which was only found in wide band-gap ferroelectric materials before. Moreover, further experiments show that the bulk photovoltaic effect probably comes from the flexoelectric effect which was induced by the stress gradient in strained Bi2Te3 films. And we anticipate that the results are generalizable to other layer-structured or two-dimensional (2-D) materials, e.g., Bi2Se3 and MoS2

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