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'Solar Home Windows' Could be Possible as Scientists Make Progress Toward Transparent Solar Cells

A new study claims its researchers can minimize the size of solar cells equivalent to home windows. Solar cells have been one of the paramount feats that human civilization has when it comes to harnessing the solar energy. ....

United States , France General , National Renewable Energy Laboratory , United Nations , World Economic Forum , American Chemical Society , University Of Michigan , New Study Shows , Bell Laboratories , Solar Home Windows , Solar Cells , Solar Energy , Photovoltaic Effect , Renewable Energy , Global Energy Crisis , Emitransparent Solar Cell , Transparent Solar Cell , University Of Michigan ,

"Design of oxygen vacancy in BiFeO3-based films for higher photovoltaic" by Tiantian Yang, Jie Wei et al.

Photovoltaic technology has been a research hotspot in the field of renewable and clean solar energy. More recently, the ferroelectric photovoltaic effect (FEPV) of BiFeO3 has attracted much attention, since it could obtain a giant open-circuit voltage (VOC) far beyond its bandgap and possibly break through the energy conversion limit of traditional solar cells. However, there has been controversy about the origin and the mechanism of FEPV in BiFeO3. In this work, (Pr, Ni) co-doped BiFeO3 film photovoltaic devices were well constructed and the intrinsic mechanism of the photovoltaic effect was comprehensively investigated. The results and analysis suggested that oxygen vacancies play significant roles on the photovoltaic effect of BiFeO3. Oxygen vacancies not only introduce impurity band as an intermediate band among the band gap of ferroelectric semiconductor to enhance the photocurrent, but also restructure the energy band of Schottky barrier at the interfaces through their electromi ....

Bismuth Ferrite , Xygen Vacancy , Photovoltaic Effect , Witchable Photovoltaic ,

"Integrating Band Engineering and the Flexoelectric Effect Induced by a" by Zehao Sun, Jie Wei et al.

Photovoltaic energy as one of the important alternatives to traditional fossil fuels has always been a research hot spot in the field of renewable and clean solar energy. Very recently, the anomalous ferroelectric photovoltaic effect in multiferroic bismuth ferrite (BiFeO3) has attracted much attention due to the above-bandgap photovoltage and switchable photocurrent. However, its photocurrent density mostly in the magnitudes of μA/cm2 resulted in a poor power conversion efficiency, which severely hampered its practical application as a photovoltaic device. In this case, a novel approach was designed to improve the photocurrent density of BiFeO3 through the cooperative effect of the gradient distribution of oxygen vacancies and consequently induced the flexoelectric effect realized in the (La, Co) gradient-doped BiFeO3 multilayers. Subsequent results and analysis indicated that the photocurrent density of the gradient-doped multilayer BiFeO3 sample was nearly 3 times as much as that o ....

Band Engineering , Bismuth Ferrite , Lexoelectric Effect , Xygen Vacancy , Photovoltaic Effect ,

Solarzellen: Drei Kristallschichten erzeugen tausendfache Power - Sonnenseite - Ökologische Kommunikation mit Franz Alt

Solarzellen: Drei Kristallschichten erzeugen tausendfache Power
Der photovoltaische Effekt ferroelektrischer Kristalle in Solarzellen lässt sich um den Faktor 1.000 erhöhen, wenn drei verschiedene Materialien in einem Gitter angeordnet werden.
Das haben Forschende der Martin-Luther-Universität Halle-Wittenberg (MLU) in einer Studie gezeigt. Dafür erzeugten sie kristalline Schichten aus Barium-, Strontium- und Calciumtitanat, die sie abwechselnd übereinanderlegten. Die Ergebnisse, die zu einer deutlich höheren Effizienz von Solarmodulen beitragen könnten, wurden in der Fachzeitschrift „Science Advances“ veröffentlicht.
Aktuell basieren die meisten Solarzellen auf Silizium, doch ihr Wirkungsgrad ist begrenzt. Seit einigen Jahren wird deshalb an neuen Materialen geforscht, etwa an Ferroelektrika, wie Bariumtitanat, einem Mischoxid aus Barium und Titan. „Ferroelektrisch bedeutet, dass das Material räumlich getrennte positive und ....

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Solarzellen: Drei Kristallschichten erzeugen tausendfache Power – Nachrichten aus Leipzig

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Der photovoltaische Effekt ferroelektrischer Kristalle in Solarzellen lässt sich um den Faktor 1.000 erhöhen, wenn drei verschiedene Materialien in einem Gitter angeordnet werden. Das haben Forschende der Martin-Luther-Universität Halle-Wittenberg (MLU) in einer Studie gezeigt.
Dafür erzeugten sie kristalline Schichten aus Barium-, Strontium- und Calciumtitanat, die sie abwechselnd übereinanderlegten. Die Ergebnisse, die zu einer deutlich höheren Effizienz von Solarmodulen beitragen könnten, wurden in der Fachzeitschrift „Science Advances“ veröffentlicht.
Aktuell basieren die meisten Solarzellen auf Silizium, doch ihr Wirkungsgrad ist begrenzt. Seit einigen Jahren wird deshalb an neuen Materialen geforscht, etwa an Ferroelektrika, wie Bariumtitanat, einem Mischoxid aus Barium und Titan. „Ferroelektrisch bedeutet, dass das Material räumlich getrennte positive und negative Ladungen besitzt“, erklärt der Physiker Dr. Akash Bhatnagar vom Zentrum ....

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