Effects of Yb3+ codoping on visible and near infrared emissions of Er3+-Yb3+ codoped AI203 powders by the sol-sol method

• 来源期刊: 科学通报(英文版)
• 年，卷（期）: 2008,（13）
• 页码范围: 1967-1971
• 页数: 5页
• 语种: 英文
• DOI: 10.1007/s11434-008-0267-8

摘要

The 0.1 mol% Er3+ and 0-2 mol% Yb3+ codoped AI2O3 powders were prepared by the sol-gel method, and the phase structure, including only two crystalline types of doped AI2O3 phase, γ-(AI,Er, Yb)2O3 andO-(AI,Er, Yb)2O3, was detected at the sintering temperature of 1000. The visible and near infrared emissions properties depended strongly on the Yb3+ codoping, and the corresponding maximal peak intensities centered at about 523, 545, 660 and 1533 nm were obtained respectively for the 0.1 mol% Er3+ and 0.5 mol% Yb3+ codoped AI2O3 powders, which were composed of 0-(AI,Er, Yb)<<2>O3 and a smallamount of γ-(AI,Er, Yb)2O3 phases. The two-photon absorption process was responsible for the visible up-conversion emissions, and the one-photon absorption process was involved in the near infrared emissions of the Er3+-Yb3+ codoped AI2O3 powders.