Related Experiment Video
Updated: Jan 3, 2026

Absolute Quantum Yield Measurement of Powder Samples
Published on: May 12, 2012
Absolute Quantum Yield Measurements of Near-Infrared Emission with Correction for Solvent Absorption
Ryosuke Hoshi1, Kengo Suzuki2, Naoya Hasebe1
1Department of Chemistry and Chemical Biology , Gunma University , Kiryu , Gunma 376-8515 , Japan.
Abstract:
In this work, we evaluated the effect of solvent absorption during photoluminescence quantum yield (PLQY) measurements of near-infrared (NIR) emission with an integrating sphere (IS) instrument, and propose an effective correction method. Transmittance spectra of representative solvents measured with an IS instrument showed significant absorption bands in the first NIR region (NIR-I; 700-950 nm), and more prominently in the second NIR (NIR-II; 1000-1700 nm) region due to overtones and a combination of fundamental vibrations involving C-H and O-H stretching modes. The emission spectra of typical NIR-I and NIR-II emitting compounds exhibited dips owing to solvent absorption, resulting in somewhat reduced PLQY values. We utilized the transmittance spectrum of the solvent to correct the observed emission spectrum. Distortion due to solvent absorption was properly corrected, and additional corrections for the reabsorption/reemission effect gave more reliable PLQY values.
Related Concept Videos
UV–Vis Spectrometers
Atomic Absorption Spectroscopy: Lab
Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing...
IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration
According to Hooke's law, the vibrational frequency is directly proportional to...
Molecular Spectroscopy: Absorption and Emission
UV–Vis Spectroscopy: Beer–Lambert Law
UV–Vis Spectrum
The UV–Vis spectrum of a molecule is the plot of its absorbance versus wavelength. The plot is drawn by taking molar...

