Ce^3+敏化YAG∶Nd^3+单晶的近红外发光性能研究

Near Infrared Luminescence Properties of the Ce^3+Sensitized YAG∶Nd^3+Single Crystal

稀土离子的近红外发光性能在光通信和太阳能利用等领域应用广泛。针对材料近红外发光性能较弱的问题,采用Ce^3+的敏化作用,提高Nd^3+的近红外发光性能。利用提拉法生长得到大尺寸的Ce^3+和Nd^3+共掺杂Y3Al5O12(YAG)单晶,用X-射线衍射仪对其物相进行分析,并通过透射光谱对晶体透光率和吸收性质进行了表征。通过对Ce^3+的激发和发射光谱分析,初步判断Ce^3+和Nd^3+间的能量传递行为。并通过Nd^3+近红外激发和发射光谱分析,研究Ce^3+对Nd^3+发光的影响。实验结果表明,由于Ce^3+向Nd^3+的有效能量传递作用,YAG∶Ce^3+,Nd^3+在450 nm蓝光激发时,近红外1060 nm发光增强1.5倍。

The near infrared luminescence properties of rare earth ions are widely used in the fields of optical communication and solar energy utilization.Based on the problem of weak near infrared emission in materials,the Ce^3+sensitizers were selected to enhance the near infrared emission intensity of Nd^3+.The Ce^3+and Nd^3+co-doped Y3Al5O12(YAG)single crystal with large size was prepared by the Czochralski method.The sample phase structure was analyzed by X-ray diffractometer,the luminousness and absorption properties were characterized by the transmittance spectra.The energy transfer behavior between Ce^3+and Nd^3+was preliminarily determined through the excitation and emission spectrum of Ce^3+ions.The influence on luminescence property of Ce^3+to Nd^3+was investigated by the near excitation and emission spectrum.The experimental results show that the 1060 nm near infrared emission intensity enhanced 1.5 times under 450 nm excitation,which was due to the effective energy transfer from Ce^3+to Nd^3+.