arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1901.01441cond-mat.mtrl-sci
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温度和波长对BiFe0.95 Mn 0.05 O3薄膜可开关光伏响应的影响

Influence of temperature and wavelength on the switchable photovoltaic response of a BiFe0.95Mn0.05O3 thin film

Said Yousfi, Houssny Bouyanfif, Mimoun El Marssi

摘要:

研究了脉冲激光沉积外延BiFe_(0.95)Mn_(0.05)O_3薄膜在较宽温度范围内的光伏响应。波长依赖的光伏效应示出了最可能与钙钛矿单元电池的B-位点上的锰掺杂和缺陷(Bi和O空位)的存在相关的间隙能级状态的贡献。PV响应的温度依赖性响应排除了电迁移和/或肖特基势垒作为主要机制。这与所观察到的可切换光伏效应相印证,所述可切换光伏效应可以由去极化场或体光伏效应来解释。此外,PV响应显示出与低温极化子样传导机制的强相关性,并且在所研究的垂直电容几何结构中检测到高开路电压(2.5V)。

英文摘要:

Photovoltaic (PV) response of epitaxial BiFe0.95Mn0.05O3 thin film grown by pulsed laser deposition has been investigated on a broad range of temperature. Wavelength dependent photovoltaic effect shows the contribution of in gap level states most likely connected to the manganese doping on the B-site of the perovskite unit cells and presence of defects (Bi and O vacancies). The temperature dependent response of the PV response rules out electromigration and/or Schottky barriers as dominant mechanisms. This is corroborated with the observed switchable photovoltaic effect that can be explained either by the depolarizing field or bulk photovoltaic effect. In addition the PV response shows strong correlation with the low temperature polaronic like conduction mechanism and high open circuit voltage (2.5V) is detected in the investigated vertical capacitive geometry.

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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