双维混合矿型铁电器用于极化高度敏感的短波光检测
Lina Li1, Xitao Liu1, Yaobin Li1,2
1State Key Laboratory of Structural Chemistry , Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China.
Journal of the American Chemical Society
|January 22, 2019
概括
研究人员开发了一种新的二维混合矿铁电材料,用于短波偏光检测. 这种材料具有强烈的极化灵敏度,高探测能力和快速响应率,为光电子开辟了新的途径.
科学领域:
- 材料科学
- 固态物理
- 光电子产品
背景情况:
- 二维 (2D) 材料对于极化敏感的光检测至关重要.
- 短波光检测的二维材料很少 (>2.5 eV).
- 由于偶联的自发偏振和光相互作用,二维混合铁电具有潜力.
研究的目的:
- 报告一个新的二维混合矿铁电材料.
- 为了研究它在短波区域对偏振敏感的光检测的特性.
- 探索其在光电子应用中的潜力.
主要方法:
- 新的二维混合铁电的合成和表征, [CH3(CH2) 3NH3]2(CH3NH3) Pb2Br7 (1).
- 测量自发偏振 (Ps),带隙和光学吸收异性.
- 评价光响应,二色率,检测力,响应率和耐疲劳性.
主要成果:
- 该材料具有3.6μC/cm2的高Ps和约2.55 eV的带隙.
- 观察到内在光学吸收异质性 (αc/αa ≈1. 9 在 405 nm).
- 沿c轴 (平行于Ps) 的最强光响应具有很大的二极化比率 (Iph (c) /Iph (a) ≈2.0) 和很高的检测能力 (~10^9 Jones).
- 显示了快速的反应率 (~20微秒) 和优异的抗疲劳特性.
结论:
- 这项工作引入了新一类二维混合矿中的第一个极化敏感铁电.
- 这种材料对短波偏光探测具有显著的前景.
- 它强调了混合矿在未来光电子产品中的新功能.
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