February 4, 2019

Application Note: Electroluminescence and Photoluminescence Spectroscopy of a Phosphorescent Organic Light Emitting Diode (PhOLED)

In this application note, emission properties of a phosphorescent organic light emitting diode (PhOLED) are investigated using an FS5 Spectrofluorometer equipped with the electroluminescence accessory. The spectrum and chromaticity coordinates of the PhOLED emission are measured and the triplet lifetime determined using time-resolved spectroscopy.

FS5 FLS1000

January 14, 2019

Proton-Coupled Electron Transfer (PCET); Spectral and Kinetic Transient Absorption Analysis of Acridine Orange with Tri-Tert-Butylphenol

Understanding fundamental photo-induced proton-coupled electron transfer (PCET) reactions of small molecules is central to research ranging from solar fuels, biological signalling, and organic electronics. By combining spectral and kinetic information of the photo-generated excited states and radical species present, researchers are able to elucidate the PCET reaction mechanisms involved in these applications. The Edinburgh Instruments LP Transient Absorption Spectrometer is the world’s only commercial system capable of recording instantaneous spectral information utilising an ICCD camera, while then easily being able to switch to measuring kinetic data on a PMT detector – all under software control. It was used to carry out the research in this application note.

LP980

December 19, 2018

Tuning the Photoluminescence of Graphene Oxide

Graphene has received tremendous attention within both the scientific community and industry due to its remarkable electrical, thermal and mechanical properties. In this application note, the photoluminescence properties of graphene oxide are investigated using an FLS1000 Photoluminescence Spectrometer equipped with double excitation and emission monochromators and an infrared PMT.

FLS1000 FS5

November 2, 2018

Photophysical Characterisation of Perovskite Quantum Dots

Perovskite Quantum Dots are a promising new class of light emitters. In this application note a complete photophysical characterisation, comprising of absorption spectra, photoluminescence spectra, photoluminescence lifetime, and quantum yield of two perovskite quantum dots is carried out using the versatile FS5 Spectrofluorometer.

FS5 FLS1000

October 22, 2018

Photogenerated Excited States in Solubillized Single-Wall Carbon Nanotubes; Transient Absorption and Oxygen Dependence of the Triplet

Single-walled carbon nanotubes (SWCNT) feature immense tensile and thermal strength with advantageous 1-dimensional molecular wire electronic properties. The Edinburgh Instruments LP980 Transient Absorption Spectrometer is well suited to study these photo-generated excited states, especially with the capability to add near-infrared (NIR) detectors needed to capture the transient species in these materials.

LP980

September 26, 2018

Luminescence Thermometry with Upconversion Materials

Many upconversion luminescent materials emissive properties change as a function of temperature, pressure, or the presence of a chemical species. Such properties have long been exploited in the development of luminescence-based sensors. In this application note, we discuss how the use of luminescence thermometry changes the emissive properties of upconversion materials.

FS5 FLS1000

August 14, 2018

Application Note: Determination of Chromaticity Coordinates and Bandgaps of III-V LEDs Using Electroluminescence Spectroscopy

Modern LEDs are efficient, bright and reliable and are one of the most versatile and widely used light sources with an ever increasing number of applications. In this application note the FS5 Spectrofluorometer, equipped with the electroluminescence accessory, is used to investigate the emission properties of four type III-V LEDs and determine their bandgaps and chromaticity coordinates.

FS5 FLS1000

July 12, 2018

Application Note: Time-Resolved Electroluminescence Spectroscopy of a White Light Emitting Diode

One of the most powerful techniques to understand the behaviour and performance of electrical devices is electroluminescence spectroscopy. In this application note 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.

FS5 FLS1000

June 18, 2018

Application Note: Temperature-Dependent Absolute Photoluminescence Quantum Yield (PLQY) Measurements of a Halide Perovskite

One of the most important photophysical parameters of perovskites for optoelectronic applications is the photoluminescence quantum yield (PLQY). In this application note the temperature dependence of the PLQY of CsPbBr3 perovskite is investigated using the FLS1000 Photoluminescence Spectrometer equipped with the Cryosphere accessory.

FLS1000

June 12, 2018

Robust and Bright Photoluminescence from Colloidal Nanocrystal/ Al2O3 Composite Films fabricated by Atomic Layer Deposition

Milan Palei, Vincenzo Caligiuri, Stefan Kudera, and Roman Krahne

Italian Institute of Technology Genova

ACS Applied Materials and Interfaces

FLS920