A novel electrochemical approach, constant-potential electrolysis and a new electrolyte system, rare earth nitrate-supporting electrolyte substance-nonethanol organic solvent, for doping of porous silicon(PS) with europium were reported. By this approach and system, the doping products were well controlled, and a high concentration of Eu(about 1021/cm3) was doped into PS. The effects of solvents, applied voltage, concentration of Eu(NO3)3 and doping time on photoluminescence of Eu-doped PS were investigated, and the optimum doping conditions were optimized. PS : Eu prepared under suitable conditions was found to emit much more intense visible room-temperature luminescence with blue-shift in wavelength than that of corresponding PS wafer. The photoluminescence mechanism for PS and PS : Eu was also discussed.
|Translated title of the contribution||Preparation of Europium-doped Porous Silicon by Constant-potential Electrolysis and Photoluminescence of Porous Silicon: Eu|
|Original language||Chinese (Simplified)|
|Number of pages||1|
|Publication status||Published - 10 May 1999|
Scopus Subject Areas
- Constant-potential electrolysis
- Porous silicon