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Near Infrared Quantum Cutting in Yb3+-Doped NaY(WO4)2 Phosphor with a High Quenching Concentration

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Abstract:

The near infrared quantum cutting phenomenon has been demonstrated in Yb3+-doped NaY(WO4)2 phosphor. The phosphor shows intense absorptions in the range of 250–330 nm, and intense near infrared emission is obtained via cooperative energy transfer from the host to Yb3+, which involves the emission of two near infrared photons around 1000 nm from an absorbed ultraviolet photon. Decay curves of the host emission around 480 nm have been measured, and the calculated energy transfer efficiency turns out to be as high as 81.6% at 40 mol% Yb3+ doping. Besides, infrared emission intensities increase with increasing Yb3+ concentration until the doping gets larger than 40 mol%. The excellent luminescence properties of the Yb3+-doped NaY(WO4)2 phosphor demonstrate its potential application as a better quantum cutting layer to enhance the energy efficiency of solar cells.

Keywords: CONCENTRATION QUENCHING; NAY(WO4)2:YB3+; NEAR INFRARED; QUANTUM CUTTING

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.5233

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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