著者
野口 祐二 井上 亮太郎 宮山 勝
出版者
日本結晶成長学会
雑誌
日本結晶成長学会誌 (ISSN:03856275)
巻号頁・発行日
vol.43, no.3, pp.161-168, 2016 (Released:2017-08-23)
参考文献数
40

The photovoltaic (PV) effect in polar materials offers great potential for light-energy conversion that generates a voltage beyond the bandgap limit of present semiconductor-based solar cells. Ferroelectrics have received renewed attention because of the ability to deliver a high voltage in the presence of ferroelastic domain walls (DWs). We report an unusually large PV response induced by ferroelastic DWs — termed ‘DW’-PV effect. The precise estimation of the bulk PV tensor in single crystals of barium titanate enables us to quantify the giant PV effect driven by 90°DWs. We show that the DW-PV effect arises from an effective electric field consisting of a potential step and a local PV component in the 90° DW region. This work offers a starting point for further investigation into the DW-PV effect of alternative systems and opens a reliable route for enhancing the PV properties in ferroelectrics based on the engineering of domain structures in either bulk or thin-film form.

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ペロブスカイト型強誘電体単結晶における巨大光起電力効果 ・ペロブスカイト型強誘電体の中で、光起電力の報告があるBaTiO3、BiFeO3 ・バルクPV効果とドメイン壁PV効果 ・ドメイン壁において、バルクの8000倍の光起電力が… https://t.co/ZT70uOkKEY

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