研究目的
Investigating the influence of domain structures on the photovoltaic properties of ferroelectric thin films in the xBaTiO3–(1?x)BiFeO3 (BT–BFO) solid-solution system.
研究成果
The study demonstrates that miniaturization of domain structures formed in solid solutions is a reliable approach to enhance the ferroelectric PV response, with the increase in domain-wall density overcoming the disadvantage of reduced contribution from each domain wall.
研究不足
The study is limited by the difficulty in preparing single-domain samples for direct comparison and the trade-off between domain-wall density and the contribution of each domain wall to the PV effect.
1：Experimental Design and Method Selection:
The study focuses on the PV properties of BT–BFO thin films, utilizing pulsed laser deposition (PLD) for film preparation.
2：Sample Selection and Data Sources:
Thin films of xBT–(1?x)BFO (x =
3：1 and 2) were prepared on SrTiO3 (100) substrates with a miscut angle of 4° along the [010] direction. List of Experimental Equipment and Materials:
A KrF excimer laser with λ = 248 nm was used for PLD.
4：Experimental Procedures and Operational Workflow:
Films were characterized using atomic force microscopy, transmission electron microscopy, and photovoltaic measurements under illumination with a laser power of
5：5 W/cm2 at a wavelength of 405 nm. Data Analysis Methods:
The PV response was analyzed in terms of bulk and domain-wall PV effects, with the photocurrent expressed as a superposition of these effects.
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