纳米ZnS∶Cu薄膜及谐振腔的制备与特性研究

Preparation and Characterization of ZnS∶Cu Nano-films and Resonator

采用水浴法制备不同掺杂浓度ZnS∶Cu纳米薄膜及相应谐振腔。X射线衍射表明,该纳米薄膜具有立方相的闪锌矿结构。光致荧光测量显示,ZnS∶Cu薄膜在2.37 eV处有很强的荧光峰。荧光强度与Cu/Zn物质的量比有关,当Cu/Zn物质的量比为0.1%时,ZnS∶Cu纳米薄膜荧光强度最强。在由Al膜与ITO薄膜构成的腔长为3.6μm的ZnS∶Cu垂直谐振腔中共观察到10多个荧光干涉峰。经分析确定,该垂直谐振腔的品质因数为30.3。

ZnS∶Cu nano-films and corresponding resonator with different Cu composition were synthesized by water bath method.The XRD indicates that the ZnS∶Cu nano-films has a cubic zinc-blend structure.The photoluminescence spectra of the ZnS∶Cu nano-films has a strong luminescence peak located at 2.37 eV.The luminescence intensity of the Zns∶Cu nano-films depends on the composition of Cu.The ZnS∶Cu nano-films have the strongest luminescence with the the Cu/Zn mole ratio of 0.1%.The resonate cavity is composed of the aluminum film and the ITO film and the cavity length is 3.6 μm.More than 10 luminescence interference peaks were observed for the resonator and the quality factor of the cavity is determined to be 30.3.