Preparation of Europium doped Porous Silicon by Constant potential Electrolysis and Photoluminescence of Porous Silicon∶Eu

Abstract

Abstract: Anovel 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)₃and 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 PSand PS∶Eu was also discussed.

Key words: Porous silicon, Europium, Constant potential electrolysis, Photoluminescence

CLC Number:

O649.4

TrendMD:

GONG Meng-Lian, ZENG Chun-Lian, SHI Jian-Xin, WONG Waikwok, CHEAH Kokwai, ZHENG Wan-Hua . Preparation of Europium doped Porous Silicon by Constant potential Electrolysis and Photoluminescence of Porous Silicon∶Eu[J]. Chem. J. Chinese Universities, 1999, 20(5): 750.

References

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