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相关概念视频

Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

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Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Photoluminescence: Applications01:14

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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异常明亮的单分子上升转化电解发光异常发光.

Yang Luo1, Fan-Fang Kong1, Xiao-Jun Tian1

  • 1International Center for Quantum Design of Functional Materials (ICQD), Hefei National Research Center for Physical Sciences at the Microscale and CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China.

Nature communications
|February 23, 2024
PubMed
概括

研究人员通过设计分子-基质接口,实现了显著更明亮的单分子上转换电光发射. 这一突破通过提高单分子发射器的排放效率来增强光电子应用.

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科学领域:

  • 光电学是指光电子产品.
  • 分子电子学分子电子学
  • 光子学 是一个光子学.

背景情况:

  • 高效的向上转换电光发射 (UCEL) 对光电子非常重要.
  • 以前的UCEL研究仅限于组合系统.
  • 单分子发射器的UCEL效率非常低.

研究的目的:

  • 为了实现明亮的单分子上升转换电解发光.
  • 在单个分子中研究提高UCEL效率的机制.
  • 提供对单分子电光发光的洞察力.

主要方法:

  • 工程分子-基板接口能量水平对齐.
  • 激活旋转三联介导的UCEL机制.
  • 构建单分子激发的电光发光图.

主要成果:

  • 观察到异常明亮的单分子UCEL.
  • 提高了超过一个数量级的排放效率.
  • 取得了比正常偏差更强的UCEL电发光.

结论:

  • 证明了一条有效的单分子UCEL的可行途径.
  • 强调了界面工程对于UCEL的重要性.
  • 为理解和优化分子电发光提供了一个框架.