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arXiv 1801.04870cond-mat.mtrl-sci
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Pb[(Mg1/3Nb2/3)0.68 Ti 0.32] O3晶体的光伏效应和极化

Photovoltaic effect and photopolarization in Pb[(Mg1/3Nb2/3)0.68Ti0.32]O3 crystal

A. S. Makhort, F. Chevrier, D. Kundys, B. Doudin, B. Kundys

摘要:

铁电光伏材料是基于半导体的光伏器件的替代品,并且提供了以上带隙光电压生成的优点。然而,已知的化合物很少,光伏效率仍然很低。在这里,我们报告的光伏效应的发现,在未掺杂的铅镁钛酸铅晶体和适当的电场和温度下的光伏响应的显着改善。光伏效应在电场驱动的铁电偶极子重取向附近最大,在居里温度附近增加三倍。此外,在铁电饱和时,光伏响应表现出明显的回复和瞬态效应。瞬态反射组合与电和热调谐的可能性表明,光铁电晶体作为新兴的光电子学和光电子学元件,相关的全光信息存储和超越。

英文摘要:

Ferroelectric photovoltaic materials are an alternative to semiconductor-based photovoltaics and offer the advantage of above bandgap photovoltage generation. However, there are few known compounds, and photovoltaic efficiencies remain low. Here, we report the discovery of a photovoltaic effect in undoped lead magnesium niobate-lead titanate crystal and a significant improvement in the photovoltaic response under suitable electric fields and temperatures. The photovoltaic effect is maximum near the electric-field-driven ferroelectric dipole reorientation, and increases threefold near the Curie temperature. Moreover, at ferroelectric saturation, the photovoltaic response exhibits clear remanent and transient effects. The transient-remanent combinations together with electric and thermal tuning possibilities indicate photoferroelectric crystals as emerging elements for photovoltaics and optoelectronics, relevant to all-optical information storage and beyond.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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