Related Experiment Video
Updated: Feb 26, 2026
07:39
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
7.3K
Theory of Light-Modulated Emission Spectroscopy
Mehdi Ansari-Rad1, Juan Bisquert2
1Department of Physics, Shahrood University of Technology , Shahrood, Iran.
The Journal of Physical Chemistry Letters
|July 22, 2017
Summary
This study analyzes photon recycling in perovskite solar cells and quantum dot fluorescent collectors. We reveal how light-to-light impedance uncovers trap-limited photon diffusion and recombination, crucial for optimizing quantum yield.
Area of Science:
- Photonics
- Materials Science
- Solid-State Physics
Background:
- Perovskite solar cells and quantum dot (QD) fluorescent collectors are key for photon capture and utilization.
- These devices involve complex coupled processes: photon displacement, absorption, and regeneration.
- Understanding photon recycling is vital for improving device efficiency.
Purpose of the Study:
- To investigate coupled photonic processes in systems with photon recycling.
- To analyze the transfer function of modulated photon flux for insights into light-to-light interactions.
- To determine physical parameters controlling photoluminescence quantum yield.
Main Methods:
- Analysis of the transfer function for modulated outgoing to incoming photon flux.
- Characterization of light-to-light impedance in perovskite solar cells and QD collectors.
- Spectroscopic analysis to distinguish recombination and diffusion phenomena.
Main Results:
- Identified light-to-light impedance features indicative of trap-limited photon diffusion.
- Demonstrated coupling between photon diffusion and nonradiative recombination.
- Spectral shapes correlate with recombination and diffusion kinetics.
Conclusions:
- The study provides a method to probe coupled photonic processes and photon recycling.
- Light-to-light impedance analysis is a powerful tool for understanding device physics.
- This research enables the determination of parameters governing photoluminescence quantum yield in photon-recycling systems.
More Related Videos
Related Concept Videos
01:14Molecular Spectroscopy: Absorption and Emission
4.9K
Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels. Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
4.9K
02:39Emission Spectra
77.0K
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
77.0K
01:16UV–Vis Spectroscopy: Molecular Electronic Transitions
3.2K
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
3.2K
01:12Interaction of EM Radiation with Matter: Spectroscopy
3.6K
Electromagnetic (EM) radiation can be considered an oscillating electric and magnetic field propagating through a medium that can interact with matter in its path. The electric field in the radiation can interact with electrical charges in the atoms or molecules in the matter. On the other hand, the magnetic field can interact with the magnetic field in the atomic nucleus. The study of the interaction between electromagnetic radiation and matter is termed spectroscopy. Spectroscopy is the study...
3.6K
01:23Photoluminescence: Fluorescence and Phosphorescence
4.1K
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...
A pair of electrons in a...
4.1K
01:29Atomic Emission Spectroscopy: Lab
691
AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
691