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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.
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Related Experiment Video

Updated: Jan 12, 2026

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light

Published on: September 12, 2014

Singlet Fission Luminescent Solar Concentrators.

Tomi K Baikie¹, Jesse Allardice¹, Simon A Dowland²

¹Cavendish Laboratory, University of Cambridge, J.J. Thomson Ave, Cambridge CB3 0HE, U.K.

|October 31, 2025

Summary

This summary is machine-generated.

Singlet fission luminescent solar concentrators (SF-LSCs) show potential for efficient solar energy harvesting by mitigating photon flux limitations. Challenges with triplet-triplet annihilation persist at higher light intensities.

Keywords:

Luminescent Solar Concentrator (LSC)Photon Multiplication (PM)Singlet Fission (SF)

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Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light

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Published on: September 12, 2014

Close-Space Sublimation-Deposited Ultra-Thin CdSeTe/CdTe Solar Cells for Enhanced Short-Circuit Current Density and Photoluminescence

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Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Published on: August 23, 2012

Area of Science:

Materials Science
Renewable Energy
Photovoltaics

Background:

Luminescent solar concentrators (LSCs) offer a promising approach to solar energy capture.
Photon-multiplier LSCs (PM-LSCs) exhibit high photoluminescence quantum efficiency but face optical efficiency challenges with photon flux.
Singlet fission (SF) is an exciton multiplication process with potential for enhanced solar energy applications.

Purpose of the Study:

To demonstrate a photon-multiplier luminescent solar concentrator (PM-LSC) utilizing singlet fission (SF).
To investigate the suitability of TIPS-tetracene and PbS quantum dots for solid-state SF-LSC devices.
To explore SF-LSCs as a method to overcome fluence limitations in PM-LSCs.

Main Methods:

Fabrication of large-area films of TIPS-tetracene mixed with tetracene-carboxylic acid-ligated PbS quantum dots.
Integration of these films into solid-state luminescent solar concentrator devices.
Evaluation of optical efficiency and performance under varying photon fluxes.

Main Results:

Singlet fission luminescent solar concentrators (SF-LSCs) were successfully demonstrated.
The developed SF-LSCs show potential to mitigate fluence limitations seen in other quantum cutting systems.
Triplet-triplet annihilation (TTA) was identified as a limiting factor at higher photon fluxes.

Conclusions:

SF-LSCs offer a viable pathway to enhance solar energy harvesting by addressing photon flux sensitivity.
Further research is needed to overcome triplet-triplet annihilation challenges for optimal performance.
SF-LSCs represent a promising direction for the future development of advanced solar concentrator technologies.