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

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 Raman Microscope
MoreSpectroscopy Solutions – Modular Raman Microscope
Bench-top macroscopic Raman spectrometer
Spectroscopy Solutions - Photoluminescence Microspectrometer - MicOS
MoreSpectroscopy Solutions - Photoluminescence Microspectrometer - MicOS
The most versatile and cost effective microspectrometer for steady state and lifetime Photoluminescence
Spectroscopy Solutions – Modular TeraHertz Raman Spectrometer
MoreSpectroscopy Solutions – Modular TeraHertz Raman Spectrometer
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
Duetta Fluorescence and Absorbance spectrometer
MoreFluorescence and Absorbance Spectrometer - Duetta
Ultra fast compact spectrofluorometer for analytical molecular fingerprinting
New PTI QuantaMaster 8000 Series Fluorometers
MoreFluorescence – Steady State and Lifetime Modular Spectrofluorometer – QuantaMaster 8000
Simply the most sensitive and versatile benchtop steady state research fluorometers on the market
The DeltaPro has taken the complexity TCSPC and made it simple and affordable
MoreFluorescence – TCSPC Lifetime Fluorometer – DeltaPro
Compact, affordable and modular fluorescence lifetime spectrometer – time correlated single photon counting for any lab
MoreFluorescence – TCSPC Lifetime Fluorometer – DeltaFlex
High performance and flexible fluorescence lifetime spectrometer for fast and efficient acquisition of TCSPC lifetime data
MoreRaman Spectrometer - XploRA™ PLUS
Confocal Raman Microscope
MoreFluorescence – Steady State and Lifetime Nanotechnology Spectrofluorometer – Nanolog
Our modular Nanolog Spectrofluorometer is specifically designed for research in nanotechnology and namomaterials
MoreFluorescence – Steady State and Lifetime Benchtop Spectrofluorometer – FluoroMax
Most sensitive benchtop spectrofluorometer in its class offering unmatched sensitivity and unparalleled flexibility for all your lab’s research needs
MacroRAM Raman Spectrometer
MoreRaman Spectrometer - MacroRAM™
Affordable Benchtop Raman Spectrometer
LabRAM HR Evolution
MoreRaman Spectrometer - LabRAM HR Evolution
Confocal Raman Microscope


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