Photoluminescence (PL) & Electroluminescence (EL)

What is Photoluminescence Spectroscopy

Photoluminescence spectroscopy, often referred to as PL, is when light energy, or photons, stimulate the emission of a photon from any matter.  It is a non-contact, nondestructive method of probing materials. In essence, light is directed onto a sample, where it is absorbed and where a process called photo-excitation can occur. The photo-excitation causes the material to jump to a higher electronic state, and will then release energy, (photons) as it relaxes and returns to back to a lower energy level. The emission of light or luminescence through this process is photoluminescence, PL.

Our PL optimized series of spectrophotometers are used in Fluorescence Spectrometers,  Raman Spectrometers and our Custom Optical Solution Systems.  These products are also making a major contribution to the development of nanomaterials, semiconductors, photovoltaics / solar cells.

By combining Raman analysis with PL detection, it is possible to characterize both the vibrational and electronic properties of materials on a single bench top platform.  Combined Raman-PL systems allow confocal mapping capabilities with sub-micron spatial resolution. A wide range of excitation wavelengths is possible, from the UV to NIR, allowing control of the penetration depth into the material, and thus, control of the volume sampled.

Photoluminescence used in Fluorescence spectroscopy can provide two results: Fluorescence and Phosphorescence.  The Photoluminescence quantum yield or PLQY of a molecule or material is defined as the number of photons emitted, as a fraction of the number of photons absorbed is one of the common techniques for Fluorescence Spectroscopy.

Time resolved photoluminescence (TRPL) can be performed with spectrometers and microscopes.  Using Time Correlated Single Photon Counting (TCSPC) the instruments with Picosecond lasers for excitation sources has been used in the solar cell industry to monitor carrier lifetime and cell performance.

Typical applications include:

  • Band Gap Determination 
  • Impurity Levels and Defect Detection
  • Recombination Mechanisms
  • Material Quality
  • Molecular structure and crystallinity 

Browse Products

Duetta
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Fluorescence and Absorbance Spectrometer
MicOS
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Photoluminescence Microspectrometer
XploRA™ PLUS
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Raman Spectrometer - Confocal Raman Microscope
QuantaMaster 8000
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Steady State and Lifetime Modular Spectrofluorometer
Spectroscopy Solutions – Modular Raman Microscope
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Bench-top macroscopic Raman spectrometer
DeltaFlex
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TCSPC Lifetime Fluorometer
Nanolog
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Steady State and Lifetime Nanotechnology Spectrofluorometer
FluoroMax
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Steady State and Lifetime Bench-top Spectrofluorometer
LabRAM HR Evolution
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Confocal Raman Microscope
EzSpec Software
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Spectroscopy Solutions - Phosphorescence Lifetime Spectrometer – EasyLife L
MoreSpectroscopy Solutions - Phosphorescence Lifetime Spectrometer – EasyLife L
Low cost phosphorescence spectrometer from few microseconds to 300 milliseconds
Spectroscopy Solutions – Modular TeraHertz Raman Spectrometer
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Affordable ultra-low frequency Raman spectrometer down to 10 cm-1
Spectroscopy Solutions - Lifetime Fluorescence Spectrometer – EasyLife X
MoreSpectroscopy Solutions - Lifetime Fluorescence Spectrometer – EasyLife X
Low cost and easy to use time resolved fluorometer for lifetimes down to 150 ps
DeltaPro
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TCSPC Lifetime Fluorometer
MacroRAM™
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Affordable Benchtop Raman Spectrometer

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