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Photoluminescence: Applications01:14

Photoluminescence: Applications

1.1K
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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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 Microscopy01:37

Super-resolution Fluorescence Microscopy

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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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Related Experiment Video

Updated: Feb 22, 2026

Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera
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Integrated setup for time and spatially resolved micro-photoluminescence.

M Perlangeli1,2, G M Pierantozzi1, A Fondacaro1

  • 1CNR - Istituto Officina dei Materiali, Unità di Trieste, Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy.

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Summary

Researchers developed a new photoluminescence (PL) spectroscopy setup for detailed analysis of materials. This advanced system enables time-resolved, steady-state, and spatially resolved PL measurements with high precision for various semiconductor applications.

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Area of Science:

  • Materials Science
  • Spectroscopy
  • Condensed Matter Physics

Background:

  • Photoluminescence (PL) spectroscopy is crucial for characterizing semiconductor materials.
  • Existing methods may have limitations in resolution or sensitivity for certain sample types.

Purpose of the Study:

  • To present a novel setup for comprehensive photoluminescence (PL) spectroscopy.
  • To enable time-resolved, steady-state, and spatially resolved PL measurements with high resolution.

Main Methods:

  • Utilized time-correlated single photon counting (TCSPC) for time-domain information (≈50 ps resolution).
  • Employed a common-path birefringence interferometer for spectral information (≈1-4 eV NIR-UV range) via Fourier transform.
  • Implemented a micro-PL approach for analyzing micron-sized samples, including 2D semiconductors.

Main Results:

  • Successfully resolved weak PL signals from indirect-bandgap semiconductors due to high signal collection efficiency.
  • Demonstrated the apparatus's capability by measuring time-, frequency-, and spatially resolved PL on WSe2, MoS2, and WS2 flakes.
  • Achieved high spectral and temporal resolution for detailed material analysis.

Conclusions:

  • The developed PL spectroscopy setup offers versatile and high-performance characterization capabilities.
  • The apparatus is suitable for analyzing a wide range of materials, including challenging samples like 2D semiconductors and indirect-bandgap materials.
  • This new tool advances the study of photoluminescence phenomena in materials science.