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Pressure Dependence of Mn2+ Fluorescence in MnS/ZnS Core–Shell Quantum Dots

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Abstract:

The high pressure photoluminescence spectra of MnS/ZnS core–shells quantum dots were measured using a diamond anvil cell up to 9.4 GPa. Orange emission at 590 nm from the 4T16A1 transition of Mn2+ ions was observed. The Mn2+ emission shifted to red with increasing pressure. The experimental pressure coefficient was −48.3 meV/GPa, which is agreement with the calculated value based on the crystal field theory. The redshift is attributed to the increase of crystal field strength and decrease of Racah parameters during compression.

Keywords: CORE-SHELL; HIGH PRESSURE; MNS/ZNS; PHOTOLUMINESCENCE; QUANTUM DOTS

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.5227

Publication date: November 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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