TUERXUN Aidilibike, DENG Kai-mo, CHEN Yong-hu, AIERKEN Sidike, YIN Min. Highly Efficient Near-Infrared Quantum Cutting in LaF3∶Ho3+,Yb3+ for Solar Cells[J]. Chinese Journal of Luminescence, 2011,32(11): 1133-1138
TUERXUN Aidilibike, DENG Kai-mo, CHEN Yong-hu, AIERKEN Sidike, YIN Min. Highly Efficient Near-Infrared Quantum Cutting in LaF3∶Ho3+,Yb3+ for Solar Cells[J]. Chinese Journal of Luminescence, 2011,32(11): 1133-1138DOI:
Highly Efficient Near-Infrared Quantum Cutting in LaF3∶Ho3+,Yb3+ for Solar Cells
were prepared by co-precipitation method. The samples were characterized by XRD. Single-phase LaF
3
∶Ho
3+
Yb
3+
powders with hexagon structure were obtained in our experimental process. Excitation spectra
emission spectra
and decay curves were used to characterize the samples at room temperature. The energy transfer from Ho
3+
to Yb
3+
was confirmed. Further it is recognized as a resonant energy transfer process. Through the process
the samples could absorb ultraviolet photons with 300~360 nm band and emit two near-infrared photons around 1 m. This result reveals the possibility of violet to near-infrared quantum cutting with a quantum efficiency larger than 100% in Ho
3+
/ Yb
3+
co-doped fluorides
suggesting the possible application in modifying the solar spectrum to enhance the efficiency of silicon solar cells.
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references
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