Broadband downshifting luminescence in Cr<sup>3+</sup>-Yb<sup>3+</sup> codoped garnet for efficient photovoltaic generation
- Publication Type:
- Journal Article
- Citation:
- Optics Express, 2013, 21 (4), pp. 4167 - 4173
- Issue Date:
- 2013-02-25
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| Broadband downshifting luminescence in Cr3+-.pdf | Published Version | 1.18 MB |
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The Cr3+-Yb3+ codoped YAG crystals were synthesized by the solid state reaction method, in which the intense near-infrared emission around 1000 nm originated from Yb3+ 2F5/2→ 2F7/2 transition was obtained due to the efficient energy transfer from Cr3+ to Yb3+. The stable and transient spectral measurements revealed that the phonon assistant energy transfer process is responsible for the energy transfer from Cr3+ to Yb3+ upon both the excitations of Cr3+: 4T1 and 4T2 energy levels. Due to the effective absorption of Cr3+ in the visible region in YAG and the efficient energy transfer to Yb3+, this material can be developed as spectral convertors to improve silicon solar cell photovoltaic conversion efficiency. © 2013 Optical Society of America.
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