中文摘要：

研究了高浓度的Er0.3Gd0.7VO4晶体材料的红外量子剪裁现象,结果发现光激发2H11/2能级和4G11/2能级的4I13/2→4I15/2荧光跃迁的近似的量子剪裁效率η’已达约178.55%和177.61%.发现了Er0.3Gd0.7VO4晶体材料的可见激发的三光子的有效的红外量子剪裁现象和浅紫外激发的四光子的有效的红外量子剪裁现象.发现了一种新颖有趣的激发谱峰＂峰-谷＂转换的现象.报道了Er0.3Gd0.7VO4晶体材料的基于单种稀土离子Er离子的一级的红外量子剪裁现象.

英文摘要：

Recently the infrared quantum cutting has achieved an exciting development in enhancing the efficiency of solar cell.The infrared quantum cutting of Er0.3Gd0.7VO4 crystalline is studied in the present paper.It is found that the approximate quantum cutting efficiencies of 1532.5 nm 4I13/2 →4I15/2 fluorescence,when the 2H11/2 and 4G11/2 levels are excited,are about 178.55% and 177.61% respectively.Especially,effective three-photon and four-photon infrared quantum cuttings of Er0.3Gd0.7VO4 crystalline excited by visible and near-violet light are found for the first time in the present paper.An interesting＂peak-valley＂conversion phenomenon in the excitation spectrum is also observed.It is also the first time for us to find the first-order infrared quantum cutting based single species Er3 ＋ ion for Er0.3Gd0.7VO4 crystalline.