放电等离子烧结Ce、Yb共掺钇铝石榴石稀土荧光粉及其在光伏电池中的应用  

Spark Plasma Sintering of Ce,Yb Co-doped YAG Rare-earth Phosphors and Its Application in Photovoltaic Cell

作　　者：周卫新 娄朝刚[1] ZHOU Weixin;LOU Chaogang(School of Electronic Science and Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学电子科学与工程学院,南京210096

出　　处：《材料导报》2024年第22期78-82,共5页Materials Reports

基　　金：江苏省重点研发计划(BE2016175)。

摘　　要：通过多场耦合实现快速低温烧结的放电等离子技术具有快速、节能和环保等显著优势,在诸多工业领域中得到广泛应用。利用该技术合成Ce^(3+)、Yb^(3+)共掺钇铝石榴石稀土荧光粉,通过物相结构、形态和光谱特性对稀土荧光粉进行综合分析。结果表明,放电等离子烧结工艺有利于Ce^(3+)和Yb^(3+)嵌入钇铝石榴石的晶格中,晶格常数为1.2005 nm。经研磨后的稀土荧光粉颗粒粒径为1~2μm,YAG:Ce^(3+),Yb^(3+)稀土荧光粉的发射光谱峰值为552 nm和720 nm。具有光转换功能的光伏电池的测试结果表明,光伏电池相对外量子响应在500~1000 nm波长范围内有明显改善,同时短路电流密度高达35.95 mA/cm^(2),增益达0.51 mA/cm^(2),光电转换效率相对提高1.91%。The utilization of spark plasma technology,known for its rapid low-temperature sintering through multi-field coupling,is prevalent across various industrial sectors due to its benefits of high efficiency,energy conservation,and eco-friendliness.In this work,Ce^(3+)and Yb^(3+)co-doped yttrium aluminum garnet rare-earth phosphors were synthesized using spark plasma sintering.The structure and morphology of the rare-earth phosphors were analyzed through X-ray diffraction and scanning electron microscopy.Additionally,their spectral characteristics were examined.The findings demonstrate that spark plasma sintering effectively enables the incorporation of Ce^(3+)and Yb^(3+)ions into the yttrium aluminum garnet lattice,resulting in a lattice constant of 1.2005 nm.The particle size of the rare-earth phosphors post-grinding ranged from 1μm to 2μm.The emission spectra peaks of YAG:Ce^(3+),Yb^(3+)rare-earth phosphors were identified at 552 nm and 720 nm.Evaluation of photovoltaic cell with photo-conversion capabilities revealed a notable enhancement in relative external quantum efficiency within the 500—1000 nm range.Furthermore,the short-circuit current density reached 35.95 mA/cm^(2),representing a 0.51 mA/cm^(2)improvement,and an increase in photovoltaic conversion efficiency of 1.91%was observed.

关 键 词：放电等离子烧结 稀土荧光粉 YAG:Ce3+ YB3+ 

分 类 号：TM914.4[电气工程—电力电子与电力传动]