2018
DOI: 10.1002/adma.201803821
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Boosting Photovoltaic Output of Ferroelectric Ceramics by Optoelectric Control of Domains

Abstract: Photo‐ferroelectric single crystals and highly oriented thin‐films have been extensively researched recently, with increasing photovoltaic energy conversion efficiency (from 0.5% up to 8.1%) achieved. Rare attention has been paid to polycrystalline ceramics, potentially due to their negligible efficiency. However, ceramics offer simple and cost‐effective fabrication routes and stable performance compared to single crystals and thin‐films. Therefore, a significantly increased efficiency of photo‐ferroelectric c… Show more

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Cited by 58 publications
(76 citation statements)
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“…In this context, Bai et al synthesized a novel band‐gap (1.6 eV down from >4 eV) engineered lead‐free ferroelectric composition, i.e. (K 0.5 Na 0.5 )NbO 3 –2 mol% Ba(Ni 0.5 Nb 0.5 )O 3− δ (KNBNNO or KNN‐BNNO), and demonstrated multiple functionalities (piezoelectric, pyroelectric, and photovoltaic effects) and their cumulative effect using this single material . (K 0.5 Na 0.5 )NbO 3 supports off‐center distortion and is responsible for ferroelectric nature of KNN‐BNNO while Ba(Ni 0.5 Nb 0.5 )O 3− δ controls the electronic states in the gap of parent (K 0.5 Na 0.5 )NbO 3 using oxygen vacancies and Ni +2 ions .…”
Section: Introductionmentioning
confidence: 99%
“…In this context, Bai et al synthesized a novel band‐gap (1.6 eV down from >4 eV) engineered lead‐free ferroelectric composition, i.e. (K 0.5 Na 0.5 )NbO 3 –2 mol% Ba(Ni 0.5 Nb 0.5 )O 3− δ (KNBNNO or KNN‐BNNO), and demonstrated multiple functionalities (piezoelectric, pyroelectric, and photovoltaic effects) and their cumulative effect using this single material . (K 0.5 Na 0.5 )NbO 3 supports off‐center distortion and is responsible for ferroelectric nature of KNN‐BNNO while Ba(Ni 0.5 Nb 0.5 )O 3− δ controls the electronic states in the gap of parent (K 0.5 Na 0.5 )NbO 3 using oxygen vacancies and Ni +2 ions .…”
Section: Introductionmentioning
confidence: 99%
“…However, at the same time, there is a possibility of a light‐induced capacitance increase using appropriate device configuration . Several reports suggest that the dielectric constant of some ferroelectrics is sensitive to light which puts them forward for photocapacitor application. Intriguingly, a photocapacitor based on ferroelectrics will have a simple device architecture (a parallel plate capacitor with transparent electrodes) in contrast to hybrid halide perovskites because light could directly change the state of polarization in ferroelectrics.…”
Section: Perovskites For Energy Storagementioning
confidence: 99%
“…The energy conversion through an Olsen cycle could be equally feasible for non‐ferroelectric materials where a change in electrical properties, such as permittivity/conductivity, could be observed with thermal fluctuations, mechanical vibrations or light . In such cases, the temperature/stress/light‐dependent electrical response could be utilized along with the applied electric field in a cyclic fashion.…”
Section: Piezoelectric and Pyroelectric Energy Conversion Using Perovmentioning
confidence: 99%
“…The core functional material for multi-source energy conversion has been developed and reported in the authors' previous works. [36][37][38] It is a perovskite-structured ceramic material of (K 0.5 Na 0.5 )NbO 3 (KNN) doped with 2 mol% Ba(Ni 0.5 Nb 0.5 )O 3-Δ (BNNO). This material is abbreviated to KNBNNO hereinafter.…”
Section: Multi-source Energy Conversion Materialsmentioning
confidence: 99%