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论文类型：会议论文

发表时间：2008-01-01

收录刊物：CPCI-S

卷号：373-374

页面范围：621-624

关键字：Er3+-Y3+-codoped Al2O3 powders; up-conversion emission; a non-aqueous sol-gel process

摘要：1 mol% Er3+- and 0-10 Mol% Y3+-codoped Al2O3 powders is prepared in a non-aqueous sol-gel method. Two crystalline types of doped Al2O3, (C) and theta, are obtained for the 0-10 mol% Y3+-codoped Al2O3 powders sintered at the sintering temperature of 1000 degrees C by x-ray diffraction analysis. The green and red up-conversion emissions centered at about 550 and 670 nm increase with Y3+ codoping concentration, and the maximal intensity of both the green and red up-conversion emissions is obtained as about 100 and 10 times higher than that of the 1 mol% Er3+-doped Al2O3 powders, respectively. The enhancement in the green and red up-conversion emissions is ascribed to the improved dispersion of Er3+ in Er3+-Y3+-codoped Al2O3 powders.