用溶胶-凝胶法制备了Eu3+离子掺杂的TiO2-SiO2复合薄膜并研究了退火温度对复合薄膜的光致发光的影响.并采用XRD、Raman和光致发光谱对其进行了一系列的表征.在退火温度为700℃的时候,Eu3+离子引起的发光强度是最强的,而随着退火温度的升高由TiO2本身的Ti3+离子缺陷能级引起的在近红外820nm处的发光峰的强度变得越来越强,一方面是因为随着退火温度的升高Ti3+离子增多,即缺陷能级数量增多,另一方面是Eu3+离子的能量背传递给Ti3+离子缺陷能级,这两个原因导致820nm处的发光峰强度随退火温度而增强.
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