Photoluminescence (PL) Spectrometer

Brand : Edinburgh Instrument
Model : FLS920

Photoluminescence is a light emitting analysis of any substance such as liquid, solid or powder that absorbs light in electromagnetic radiation. Light is directed onto a sample, where it is absorbed and imparted excess energy into the material in a process called photo-excitation. One way this excess energy can be dissipated by the sample is through the emission of light, or luminescence. Photo-excitation causes electrons within a material to move into permissible excited states. When these electrons return to their equilibrium states, the excess energy is released and may include the emission of light (a radiative process) or may not (a non-radiative process).

The energy of the emitted light (photoluminescence) relates to the difference in energy levels between the two electron states involved in the transition between the excited state and the equilibrium state. Photoluminescence is formally divided into two categories namely fluorescence and phosphorescence, depending on the nature of the excited state. Typical fluorescence lifetime is around 10 ns meanwhile phosphorescence lifetimes are typically in milliseconds to seconds. This equipment also enables to measure fluorescence lifetime using TCSPC technique and anisotropy analysis.

Description

Applications
This instrument is widely applied in areas like photophysics, photochemistry, biophysics and materials research. Apart from the detection of light emission patterns, photoluminescence spectroscopy has a great significance in other fields such as detection of aggregation-caused quenching or aggregation-induced emission properties, band gap determination, recombination mechanisms, determination of impurity levels and defect detection.
Sample Requirements
• Powder
• Film
• Solid
• Liquid

Additional information

Name

NORHASHIMAH BINTI RAMLI
B.Sc., M.Sc. (UKM) Physics

Email

norhashimahramli@ukm.edu.my

No. Tel

03-8911 8510