Abstract
Mn 4+ /Yb 3+ co-doped CaGdAlO 4 are prepared to achieve efficient spectral conversion. XRD Rietveld refinement analysis is performed to obtain the structural information of the synthesized materials. The results indicate the Al 3+ and Gd 3+ sites are substituted by the Mn 4+ and Yb 3+ ions, respectively. Intense NIR emission within the most sensitive response region of c-Si solar cells is observed under UV–visible excitation, indicating the existence of efficient energy transfer from Mn 4+ to Yb 3+ ions. The dipole-dipole interaction is verified to be the dominant energy transfer mechanism among the Mn 4+ -Yb 3+ pair. The linear dependence of energy transfer rate on the Yb 3+ concentration indicates that one NIR photon is generated with the absorption of one UV–visible photon. The broad excitation spanning from 250 to 600 nm monitored at NIR emission demonstrates that the Mn 4+ ions in the CaGdAlO 4 host can be efficient sensitizers for Yb 3+ ions to enhance the performance of c-Si cells.
Original language | English |
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Pages (from-to) | 189-201 |
Number of pages | 13 |
Journal | Journal of Luminescence |
Volume | 210 |
DOIs | |
State | Published - Jun 2019 |
Funding
This work was supported by the National Natural Science Foundation of China (Grant Nos. 51772159, 51472125, 11504188, U1504626 and 51702171); the Natural Science Foundation of Zhejiang Province (Grant No. LZ17E020001); and K.C. Wong Magna Fund in Ningbo University. This work was supported by the National Natural Science Foundation of China (Grant Nos. 51772159 , 51472125 , 11504188 , U1504626 and 51702171 ); the Natural Science Foundation of Zhejiang Province (Grant No. LZ17E020001 ); and K.C. Wong Magna Fund in Ningbo University .
Funders | Funder number |
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National Natural Science Foundation of China | 11504188, 51772159, 51702171, 51472125, U1504626 |
Ningbo University | |
Natural Science Foundation of Zhejiang Province | LZ17E020001 |
Keywords
- Downconversion
- Energy transfer
- Mn ions