Scholarlink

<p>The optical control of dielectric properties is a topic of concern, as it involves the development of new non-contact optoelectronic devices. The bandgap of dielectric materials is generally large, and only high-energy ultraviolet light can modulate the dielectric properties of these materials. Here, we present the Maxwell-Wagner relaxation in polycrystalline SmCrO<sub>3</sub> that can be modulated by visible light. The rate of change of dielectric constant shows negative and then positive change with frequency, with a minimum of −51% at 100 Hz (measure voltage 0.1 Ṽ) and a maximum of +654% peak around 8 kHz. Although Ti-doped SmCrO<sub>3</sub> samples become insulators, visible light can still modulate the appearance of Debye relaxation peaks, and a maximum of +790% ultrasensitive low-frequency photo-dielectric variation was observed in SmTi<sub>0.05</sub>Cr<sub>0.95</sub>O<sub>3</sub> sample. Analysis shows that localized features of the photogenerated carriers are the reason for the change in bidirectional photosensitive dielectric properties.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Ultra sensitive low-frequency visible light dielectric response measured by real capacitance method

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月16日

查看全文
  • Ruoxuan Zhang,
  • Rui Li,
  • Yan Chen,
  • Yimin Cui

摘要

The optical control of dielectric properties is a topic of concern, as it involves the development of new non-contact optoelectronic devices. The bandgap of dielectric materials is generally large, and only high-energy ultraviolet light can modulate the dielectric properties of these materials. Here, we present the Maxwell-Wagner relaxation in polycrystalline SmCrO3 that can be modulated by visible light. The rate of change of dielectric constant shows negative and then positive change with frequency, with a minimum of −51% at 100 Hz (measure voltage 0.1 Ṽ) and a maximum of +654% peak around 8 kHz. Although Ti-doped SmCrO3 samples become insulators, visible light can still modulate the appearance of Debye relaxation peaks, and a maximum of +790% ultrasensitive low-frequency photo-dielectric variation was observed in SmTi0.05Cr0.95O3 sample. Analysis shows that localized features of the photogenerated carriers are the reason for the change in bidirectional photosensitive dielectric properties.