Article (Scientific journals)
Increasing bulk photovoltaic current by strain tuning
Nadupalli, Shankari; Kreisel, Jens; Granzow, Torsten
2019In Science Advances, 5 (3)
Peer reviewed
 

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Abstract :
[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.
Disciplines :
Physics
Identifiers :
10.1126/SCIADV.AAU9199
Author, co-author :
Nadupalli, Shankari
Kreisel, Jens ;  University of Luxembourg > Rectorate
Granzow, Torsten
External co-authors :
no
Language :
English
Title :
Increasing bulk photovoltaic current by strain tuning
Publication date :
2019
Journal title :
Science Advances
Volume :
5
Issue :
3
Peer reviewed :
Peer reviewed
Focus Area :
Physics and Materials Science
Available on ORBilu :
since 31 July 2019

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