Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Photoluminescence: Applications01:14

Photoluminescence: Applications

386
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...
386
Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

1.7K
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...
1.7K
Colors and Magnetism03:02

Colors and Magnetism

11.6K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.6K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Ultralow Gain-Normalized Dark Current Density in a Colloidal Quantum Dot Avalanche Photodiode with a SACM Architecture.

Nano letters·2026
Same author

Robust Quantum Cutting via Halide-Bearing Ligand Passivation and Gradient Halide Reconstruction for Ultrabroadband Ultraviolet-to-Near-Infrared Photodetection and Imaging.

ACS nano·2026
Same author

NiO<sub><i>x</i></sub>/SAM-Mediated Interface Engineering for High-Performance PEA<sub>2</sub>SnI<sub>4</sub> Pure-Red Perovskite Light-Emitting Diodes.

The journal of physical chemistry letters·2026
Same author

Alpha-2-macroglobulin attenuates glucocorticoid-induced osteonecrosis of the femoral head by enhancing osteogenesis and antioxidant defense via the Akt/Nrf2 signaling pathway.

Journal of molecular histology·2026
Same author

Association between usage intensity of short video platforms and altered brain function: a resting-state functional magnetic resonance imaging study.

Frontiers in human neuroscience·2026
Same author

Brain-dead humans as preclinical reference models for xenotransfusion: bridging nonhuman primates and clinical applications through <i>in vitro</i> evaluation.

Frontiers in physiology·2026

相关实验视频

Updated: Jun 19, 2025

Low-energy Cathodoluminescence for OxyNitride Phosphors
07:03

Low-energy Cathodoluminescence for OxyNitride Phosphors

Published on: November 15, 2016

10.6K

从基于Ce的金属化物中产生高效的深蓝色电发光.

Longbo Yang1, Hainan Du1, Jinghui Li1

  • 1Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, China.

Nature communications
|July 24, 2024
PubMed
概括

这项研究引入了一种能量传输方法,以改进稀土发光二极管. 通过优化从自我被捕捉的刺激子到离子的能量传输,研究人员提高了设备的性能.

更多相关视频

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode
10:41

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Published on: May 31, 2018

8.8K
Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes
05:51

Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes

Published on: November 15, 2016

8.0K

相关实验视频

Last Updated: Jun 19, 2025

Low-energy Cathodoluminescence for OxyNitride Phosphors
07:03

Low-energy Cathodoluminescence for OxyNitride Phosphors

Published on: November 15, 2016

10.6K
Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode
10:41

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Published on: May 31, 2018

8.8K
Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes
05:51

Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes

Published on: November 15, 2016

8.0K

科学领域:

  • 材料科学 材料科学 材料科学
  • 固态物理 固态物理
  • 光电学是指光电子产品.

背景情况:

  • 稀土离子 (Ce3+,Eu2+) 由于其光谱特性,效率和稳定性,对电光发光有希望.
  • 直接向4f轨道注入电荷具有挑战性,限制了外部量子效率,并增加了稀土发光二极管 (LED) 的工作电压.

研究的目的:

  • 提出和研究一种能量传输方案,以克服稀土离子型LED的局限性.
  • 通过优化能量传输路径来提高基于的LED的性能.

主要方法:

  • 利用X射线光电子光谱 (XPS) 来分析材料组成和电子状态.
  • 采用过渡吸收光谱来研究激发状态动态和能量传递过程.
  • 制造和表征的发光二极管采用Cs3CeI6作为活性层.

主要成果:

  • 证明了Cs3CeI6中的发光主要是由基于I2的自我陷刺激子转移到基于Ce的Frenkel刺激子的能量转移所驱动的.
  • 表明,增强自我捕获激子发射和基于Ce的弗伦克尔激子激发之间的光谱重叠显著提高了能量传输效率.
  • 在制造的LED中,达到1073 cd/m2的最大亮度和7.9%的外部量子效率.

结论:

  • 拟议的能量传输战略有效地解决了直接向4f轨道注入电荷的挑战.
  • 优化的光谱重叠对于基于稀土的发光系统中高效的能量传输至关重要.
  • 开发的Cs3CeI6LED显示了电解发光应用的有希望的性能.