Near-infrared quantum cutting in YPO4:Yb3+, Tm3+ via cooperative energy transfer
Near-infrared quantum cutting in YPO4:Yb3+, Tm3+ via cooperative energy transfer
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DOI：
10.1063/1.3078823
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发表时间：
2009-02
影响因子：
4
通讯作者：
Lechun Xie;Yuhua Wang;Huijuan Zhang
中科院分区：
文献类型：
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作者：
Lechun Xie;Yuhua Wang;Huijuan Zhang
通过对YPO_4：Yb ~（3+），Tm ~（3+）的光致发光特性和Tm ~（3+）的G14发射衰减寿命曲线的研究，给出了Tm ~（3+）与Yb ~（3+）之间协同能量转移的实验证据。在474 nm处，Tm ~（3+）的G14能级激发下，实现了Yb ~（3+）的F25/2→F27/2发射（约970-1010 nm）的近红外量子剪裁。计算了Yb 3+浓度对量子效率的影响，最大量子效率为172.8%。由于Yb ~（3+）跃迁的能量与晶体Si的带隙相匹配，该荧光粉在硅基太阳能电池中具有潜在的应用前景。
The experimental evidences of the cooperative energy transfer from Tm3+ to Yb3+ have been presented by the photoluminescence properties of YPO4:Yb3+, Tm3+, and the decay lifetime curves of the G14 emission of Tm3+. Near-infrared quantum cutting involving the F25/2→F27/2 emission of Yb3+ (about 970–1010 nm) is achieved upon the excitation of G14 energy level of Tm3+ at 474 nm. Quantum efficiency related to Yb3+ concentration is calculated, and the maximum efficiency reaches 172.8%. Because the energy of Yb3+ transition is matched with the band gap of the crystalline Si, the phosphors could be applied potentially in silicon-based solar cells.