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Optically detected magnetic resonance study of CdS/HgS/CdS quantum dot quantum wells

Article Abstract:

A study attempted to clarify the optical properties associated with trapped electrons and holes in CdS/HgS/CdS quantum dot quantum well samples using optically detected magnetic resonance spectroscopy. It was found that the optical properties of the quantum dot quantum well are governed by the properties of the CdS/HgS interface. The optically detected magnetic resonance spectroscopic methods revealed some insight on the mechanism of recombination and the identity of the interface sites. Experimental methods and results are presented.

Analysis, Case studies, Surface chemistry, Complex compounds, Coordination compounds, Quantum wells

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Optical and magnetooptical measurements of N,N'-dimethylperylene-3,4,9,10-tetracarboxylic acid diimide thin films

Article Abstract:

The preparation and characterization of N,N'-dimethylperylenetetracarboxylic acid diimide (Me-PTCDI) thin films is described. The thin films were prepared by vapor deposition method. Absorption, photoluminescence and optically detected magnetic resonance spectroscopy were used to analyze the photogeneration and radiative single and nonradiative triplet exciton recombination of the Me-PTCDI thin films. The results indicate the formation of molecular dimers or larger aggregates.

Research, Thin films, Exciton theory, Excitons

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Optically detected magnetic resonance studies of the surface/interface properties of II-IV semiconductor quantum dots

Article Abstract:

The utilization of optically detected magnetic resonance spectroscopy is used to examine the influence of the surface/interface quality on the optical properties of those quantum dots. The method adopted reflected knowledge of the chemical identity of the surface/interface trapping site, and trapped electron and trapped hole recombination mechanism.

Usage, Observations, Nuclear magnetic resonance spectroscopy, Electrons, Quantum chemistry, Chemical properties, NMR spectroscopy

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