Reference : Increasing bulk photovoltaic current by strain tuning
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/40013
Increasing bulk photovoltaic current by strain tuning
English
Nadupalli, Shankari [> >]
Kreisel, Jens mailto [University of Luxembourg > Rectorate >]
Granzow, Torsten [> >]
2019
SCIENCE ADVANCES
5
3
Yes
International
2375-2548 Granzow, Torsten/0000-0002-3777-4689 ISI:000462564300039
[en] Photovoltaic phenomena are widely exploited not only for primary energy generation but also in photocatalytic, photoelectrochemistry, or optoelectronic applications. In contrast to the interface-based photovoltaic effect of semiconductors, the anomalous or bulk photovoltaic effect in ferroelectrics is not bound by the Shockley-Queisser limit and, thus, can potentially reach high efficiencies. Here, we observe in the example of an Fe-doped LiNbO3 bulk single crystal the existence of a purely intrinsic ``piezophotovoltaic'' effect that leads to a linear increase in photovoltaic current density. The increase reaches 75 under a low uniaxial compressive stress of 10 MPa, corresponding to a strain of only 0.005\%. The physical origin and symmetry properties of the effect are investigated, and its potential for strain-tuned efficiency increase in nonconventional photovoltaic materials is presented.
http://hdl.handle.net/10993/40013
10.1126/sciadv.aau9199 eaau9199

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