A novel approach for optical activation of rare earths in rare earth-doped porous silicon microwave heating method

作者：Shi, JX^*; Tian, J; Gong, ML; Zhou, JY; Cai, SH; Yang, YS

来源：Acta Chimica Sinica, 1999, 57(8): 901-906.

• porous silicon
• rare earths
• microwave heating method
• optical activation
• photoluminescence

A novel approach for the optical activation of rare earths in rare earth - doped porous silicon (PS:RE), microwave heating method, was first reported. The effects of sample - placement modes and microwave heating time on the room - temperature photoluminescence in the infrared region for PS:Er and PS: Nd, prepared with constant - potential electrochemical doping, were investigated. The heated samples were observed to be homogeneous in appearance and to emit intense room - temperature photoluminescence around 1.54 mu m and 1.06 mu m, which are assigned to the intrashell 4f - 4f transitions of Er3 ions (I-4(13/2)-->I-4(15/2)) and Nd3 ions (F-4(3/2)-->I-4(11/2)), respectively. In addition to the thermal activation, the non - thermal interaction of microwave radiation with PS:RE, mainly the spread of rare earths and the trapping of oxygen with rare earths in the porous layer, is considered to play an important role in the optical activation of RE3 ions.

• 出版日期1999
• 单位中山大学