CAJ | 학술논문

采用高温熔融法制备了Yb3＋/Er3＋掺杂的氟氧化物发光微晶玻璃,确定了最佳熔化温度（1 100℃）和退火温度（440℃,480℃）。测定得到基质玻璃的透过率为85%,掺入稀土后,透过率有所下降,并出现了稀土离子的特征吸收峰。980 nm半导体激光器（LD）激发下样品的上转换发射光谱存在4个明显的发射峰,分别为410,532,546和656 nm,对应于2H9/2→4I15/2,2H11/2→4I15/2,4S3/2→4I15/2和4F9/2→4I15/2跃迁。研究了不同Yb3＋/Er3＋（摩尔分数）和Er3＋浓度对上转换发光强度的影响,当Yb3＋∶Er3＋=4∶1、Er3＋摩尔分数为1.5%时,上转换发光强度达到最高。根据发光强度与泵浦功率之间的关系,确定了上转换发射均为双光子过程。讨论了Yb3＋,Er3＋离子间的能量传递,建立了上转换发光机制。
채용고온용융법제비료Yb3＋/Er3＋참잡적불양화물발광미정파리,학정료최가용화온도（1 100℃）화퇴화온도（440℃,480℃）。측정득도기질파리적투과솔위85%,참입희토후,투과솔유소하강,병출현료희토리자적특정흡수봉。980 nm반도체격광기（LD）격발하양품적상전환발사광보존재4개명현적발사봉,분별위410,532,546화656 nm,대응우2H9/2→4I15/2,2H11/2→4I15/2,4S3/2→4I15/2화4F9/2→4I15/2약천。연구료불동Yb3＋/Er3＋（마이분수）화Er3＋농도대상전환발광강도적영향,당Yb3＋∶Er3＋=4∶1、Er3＋마이분수위1.5%시,상전환발광강도체도최고。근거발광강도여빙포공솔지간적관계,학정료상전환발사균위쌍광자과정。토론료Yb3＋,Er3＋리자간적능량전체,건립료상전환발광궤제。
Yb3＋/Er3＋-codoped oxyfluoride glass ceramics were prepared by the high temperature melting method,and a suitable fusing temperature（1 100 ℃） and annealing temperatures（440 ℃,480 ℃） of the rare-earth-doped glass ceramics were determined.Experiments show that the transmittance of the host glass is 85%,but the transmittance drops evidently and there are characteristic absorption peaks of rare-earth ions when the host glass is doped with Yb3＋/Er3＋ ions.With 980 nm laser diode（LD） excitation,the purple emission peak at 410 nm,green emission peak at 532 nm and 546 nm and red emission peak at 656 nm corresponding to 2H9/2→4I15/2,2H11/2→4I15/2,4S3/2→4I15/2 and 4F9/2→4I15/2 transitions of Er3＋,respectively,were simultaneously observed at room temperature.The effects of Yb3＋/Er3＋ in mol concentration ratio and different concentrations of Er3＋ ion on the intensity of up-conversion luminescence was studied.The experiments show that the up-conversion luminescence intensity is up to maximum value when the concentration ratio of Yb3＋/Er3＋ is 4∶ 1 and concentration of Er3＋ ion is 1.5% in mol concentration.According to the relationship between the pump power and luminous intensity,the four up-conversion luminescences are verified to be the two-photon process.Energy transfer was used in discussing the up-conversion mechanism and the pertinent up-conversion mechanism was proposed.