Efficient blue to near-infrared luminescence properties in Pr3+ - Yb3+ co-doped Li8Bi2(MoO4)7 phosphor

Efficient blue to near-infrared luminescence properties in Pr3+ - Yb3+ co-doped Li8Bi2(MoO4)7 phosphor
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Pr3-Yb3 共掺杂 Li8Bi2(MoO4)7 荧光粉的高效蓝光至近红外发光特性

DOI:
10.1016/j.optmat.2020.110232
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发表时间:
2020-10
期刊:
影响因子:
3.9
通讯作者:
Miao Han
Miao Han
中科院分区:
材料科学3区
文献类型:
--
作者:
Jin Zhao;Xiaoqi Zhao;Zhihua Leng;Miao Han

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下转换磷光体可以吸收未充分利用的高能光子并转换为900 - 1100 nm的可用近红外(NIR)光子,从而改善硅基太阳能电池的光谱失配。本文采用溶胶-凝胶法制备了Pr ~(3+)-Yb ~(3+)共掺杂的Li_8Bi_2(MoO_4)_7荧光粉。X射线衍射结果表明,所有样品均为纯相。在453 nm蓝光激发下,Yb ~(3+)和Pr ~(3+)离子的近红外发光被激发。Pr ~(3+)-Yb ~(3+)共掺样品的近红外发射积分强度是相应的Pr ~(3+)单掺样品的1.6倍。Yb 3+的最佳掺杂浓度为0.05,最高效率为62.7%,并分析了Pr 3 +-Yb 3+的能量传递过程。结果表明,Li 8Bi 2(MoO 4)7:Pr 3+,Yb 3+近红外荧光粉在晶体硅太阳电池光谱转换器中具有潜在的应用前景。
Down-conversion phosphors could absorb underutilized high-energy photons and convert to available near-infrared (NIR) photons in 900 – 1100 nm improving the spectral mismatch of silicon-based solar cells. Herein, we report the preparation of Pr3+-Yb3+co-doped Li8Bi2(MoO4)7molybdate phosphors by sol-gel method. The pure phases of all samples were confirmed by the X-ray diffraction. Under 453 nm blue light excitation, near infrared emission from Yb3+and Pr3+can be generated. The NIR emission integral intensity of the Pr3+- Yb3+co-doped sample was 1.6 times than that of the corresponding Pr3+single - doped sample. The optimal doping concentration of Yb3+was 0.05 and the highest efficiency was 62.7%, furthermore the energy transfer process in Pr3+-Yb3+was analyzed. The results indicate that Li8Bi2(MoO4)7: Pr3+, Yb3+NIR phosphors have potential applications in the spectral converters of crystalline silicon solar cells.
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