首页> 外文期刊>Nano letters >Hole-induced electron transport through core-shell quantum dots: A direct measurement of the electron-hole interaction
【24h】

Hole-induced electron transport through core-shell quantum dots: A direct measurement of the electron-hole interaction

机译:空穴诱导的电子通过核-壳量子点的传输:电子-空穴相互作用的直接测量

获取原文
获取原文并翻译 | 示例
           

摘要

Quantum dots (QDs) have promising optoelectronic properties. Colloidal QD heterostructures, systems in which two semiconductors are incorporated in a single colloid, may show novel and potentially useful transport phenomena. Here, we report on the physical mechanisms of charge transport through PbSe-CdSe core-shell QDs measured with cryogenic scanning tunneling spectroscopy. Compared to single-component QDs, an additional hole-induced electron tunneling channel is found. Electron tunneling with and without a hole occurs at different bias, allowing the determination of the electron-hole interaction energy (80 meV). This energy is sufficiently large to allow for a transport regime at room temperature in which electrons tunnel into the dot only if a hole is present, an ideal situation for controlled single-photon emission.
机译:量子点(QD)具有良好的光电性能。胶体QD异质结构(在单个胶体中结合了两个半导体的系统)可能显示出新颖且潜在有用的传输现象。在这里,我们报告通过低温扫描隧道光谱法测量的通过PbSe-CdSe核壳QDs电荷传输的物理机制。与单组分量子点相比,发现了一个额外的空穴诱导电子隧穿通道。具有和不具有空穴的电子隧穿以不同的偏压发生,从而允许确定电子-空穴相互作用能(80meV)。该能量足够大,以允许在室温下进行传输,其中只有存在空穴时,电子才会隧穿到点中,这是受控的单光子发射的理想情况。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号