Near Infrared Quantum Cutting for Solar Cells in CeF₃:Yb³⁺ Nanophosphors

Abstract:

The CeF₃ nanophosphors with Yb³⁺ concentrations from 0 to 8% had been prepared by hydrothermal method and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscopy (TEM). Their photoluminescence properties including excitation spectra, Uv-visibe and near infrared (NIR) emission spectra and fluorescence dynamics were studied. In the CeF₃: Yb³⁺ nanophosphors an intensity infrared emission originated from Yb^{3+ 2}F5/2 - ²F7/2 transition at 900-1050 nm matching to the energy of Si band gap of Si-based solar cells was observed under the excitation of 5d level of Ce³⁺. The lifetime of Ce³⁺ decreases and the quantum efficiency (QE) increases with increasing Yb³⁺ concentration.

• Periodical: Advanced Materials Research (Volume 366)
• Pages: 215-218
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.366.215
• Online since: October 2011
• Authors: Su Wen Li
• Keywords: Efficiency, Nanophosphors, Near-Infrared Quantum Cutting

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