Near-infrared emission of Yb3+ through energy transfer from ZnO to Yb3+ in glass ceramic containing ZnO nanocrystals.
Near-infrared emission of Yb3+ through energy transfer from ZnO to Yb3+ in glass ceramic containing ZnO nanocrystals.
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DOI：
10.1364/ol.36.002767
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发表时间：
2011-08
期刊：
影响因子：
3.6
通讯作者：
Qun Luo;X. Qiao;X. Fan;Xianghua Zhang
中科院分区：
文献类型：
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作者：
Qun Luo;X. Qiao;X. Fan;Xianghua Zhang
采用熔融-淬冷法和热处理工艺制备了Yb（3+）掺杂ZnO纳米微晶玻璃和微晶玻璃。在1000 nm附近，ZnO纳米晶中的氧自由基与Yb（3+）发生了能量转移，产生了Yb（3+）：（2）F（5/2）→（2）F（7/2）的近红外发射，能量转移效率约为10%。Yb（3+）在390 nm激发下的近红外发射量子产率为16.7%。这些材料在通过光谱修饰实现高效硅太阳能电池方面具有潜在的应用前景。
Yb(3+)-doped glass and glass ceramic containing ZnO nanocrystals were prepared by the melting-quenching method and subsequent heat treatment. Intense near-IR emission around 1000 nm that originated from the transition of Yb(3+):(2)F(5/2)→(2)F(7/2) was generated as a result of energy transfer from oxygen interstitials in ZnO nanocrystals to Yb(3+) with energy transfer efficiency of about 10%. The quantum yield for the near-IR emission of Yb(3+) under the excitation of 390 nm was about 16.7%. These materials have potential application in achieving high-efficiency Si solar cells via spectrum modification.