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Stable blue light emission from oxidized porous silicon

1994; IOP Publishing; Volume: 6; Issue: 2 Linguagem: Inglês

10.1088/0953-8984/6/2/026

1361-648X

Jian‐Xian Lin, L. Z. Zhang, B. R. Zhang, Beibei Zong, G. G. Qin,

Semiconductor materials and devices

We have achieved production of porous silicon (PS) that emits blue light at a peak wavelength of 460 nm. On storing it in air for three months, or illuminating it with the 365 nm line of a UV lamp, its photoluminescence intensity and peak wavelength remain stable. With Fourier-transform infrared (FTIR) measurements, we have studied the surface chemical bonds of the PS emitting blue light, and compared its FTIR spectrum with those of the as-prepared PS emitting red-orange light, and those of the processed PS emitting no light We consider that the blue light emission originates from the SiOx layers covering nanoscale silicon units in PS.