以柠檬酸为络合剂、钛酸丁酯为前驱体,制备了Er3+掺杂浓度(摩尔分数)为0.1%-5.0%的(Er,Y)2Ti2O7(EYTO)粉末.在700℃烧结EYTO粉末中EYTO相的晶化不完全,随着烧结温度的升高晶化程度显著提高,-OH基团的含量逐渐减少;在1000℃烧结,得到结晶完全且不含-OH基团的EYTO相.不完全晶化的EYTO相的PL谱为半高宽112 nm的单一宽峰,结晶完全的EYTO相其PL谱为发生Stark分裂的分立发光峰.随着烧结温度的升高EYTO粉末的PL强度和荧光寿命连续提高,归因于粉末中-OH基团的逐步脱除和EYTO相晶化程度的提高;Er3+浓度在0.1%-1.5%区间均呈现上升趋势,源于EYTO相为Er3+提供了均匀分散;Er3+浓度为1.5%时均达到最大值、荧光寿命为20.9 ms.当Er3+浓度超过1.5%时,Er3+-Er3+间的交互作用增强导致1.53μm的PL强度和荧光寿命持续下降.
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