An introduction to the theory of polarised Raman spectroscopy and exploring the wealth of sample information that can be obtained using this technique.
In this whitepaper PhOLED are investigated using an FS5 Spectrofluorometer with electroluminescence accessory. Spectrum and chromaticity coordinates of the PhOLED emission are measured and triplet lifetime determined using time-resolved spectroscopy.
A white paper showing how the FLS1000 Photoluminescence Spectrometer is used to investigate the emission properties of a phosphor coated indium gallium nitride white light LED using both steady state and time-resolved electroluminescence spectroscopy.
In 1907 English engineer Henry Joseph Round was testing the rectifying current behaviour of SiC crystallites and noticed that a faint yellow light was emitted from the SiC; this was simultaneously the first reported observation of the phenomena of electroluminescence spectroscopy and the first successful operation of a light emitting diode (LED). The work of Round was expanded on by a few others in the early 20th century, but it would take many decades for LEDs to become efficient enough for practical use.
In this note the photophysical properties of a promising white light emitting perovskite, (DMEN)PbBr4, are measured using the FLS1000 Photoluminescence Spectrometer.
Excitation-emission spectroscopy becomes increasingly useful in the study of photo-luminescent materials. The spectral selectivity of the technique enables the quantification of multiple emitting sites in rare-earth doped crystals as well as the rapid acquisition of polycyclic aromatic hydrocarbons (PAH) in contaminated water. In order to obtain a complete spectral fingerprint via excitation-emission spectroscopy, scans at multiple excitation wavelengths over the emission spectra are required. Especially in the case of rare-earth materials with narrow emission linewidths, this is extremely demanding in terms of resolution. The acquisition time of such excitation-emission maps (EEM) can be significantly reduced by using Charge Coupled Device (CCD) detectors.
