Near-infrared quantum cutting in Bi3+/Yb3+ co-doped oxyfluoride glasses via cooperative energy transfer for solar cells

Near-infrared quantum cutting in Bi3+/Yb3+ co-doped oxyfluoride glasses via cooperative energy transfer for solar cells
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Bi3/Yb3共掺杂氟氧化物玻璃的近红外量子切割通过太阳能电池的协同能量转移

DOI:
10.1016/j.optmat.2014.10.047
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发表时间:
2014-12
期刊:
影响因子:
3.9
通讯作者:
Yanli Mao*
Yanli Mao*
中科院分区:
材料科学3区
文献类型:
--
作者:
Weirong Wang;Shaofeng Zou;Xiao Lei;Huiping Gao;Yanli Mao*

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采用熔融淬火法制备了Bi3+/Yb3+离子共掺55sio2 - 20al2o3 - 5na2co3 - 20caf2玻璃。在Bi3+和Yb3+共掺杂的氟化氧玻璃中,实现了吸收一个紫外光子而发射两个近红外光子的高效量子切割。当激发波长为303 nm时,Yb3+:2F5/2→2f7 /2跃迁在977 nm附近产生了强烈的特征近红外辐射,诱导Bi3+发生了1s0→3p1跃迁。我们的玻璃的最大量子效率估计为164.3%。提出了一种通过二阶下转换过程的协同能量传递机制。该玻璃可以作为一种潜在的量子切割转换器,通过光谱修饰来提高晶体硅太阳能电池的光伏能量转换效率。
The Bi3+/Yb3+ion co-doped 55SiO2–20Al2O3–5Na2CO3–20CaF2glasses are synthesized successfully by a conventional melting-quenching method. High efficient quantum cutting involving the emission of two near-infrared photons for one ultraviolet photon absorbed is realized in the oxyfluoride glasses co-doped with Bi3+and Yb3+. An intense characteristic near-infrared emission around 977 nm of Yb3+:2F5/2→2F7/2transition is obtained when the 303 nm is as excitation wavelength to induce the1S0→3P1transition of Bi3+. The maximum quantum efficiency of our glasses is estimated to be 164.3%. The energy transfer mechanism is proposed to be a cooperative energy transfer via second-order down-conversion process. The glasses could be a potential quantum cutting converter to improve the photovoltaic energy conversion efficiency of crystalline Si solar cells via spectrum modification.
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