The surface and in-depth chemical nature of the photoluminescent stained Si layer obtained with a novel procedure based on HF/HNO3 is presented. Oxide-free porous Si surfaces result from controlled preparation, storing and handling of samples, as revealed by parallel X-ray photoelectron spectroscopy and X-ray-induced Auger electron spectroscopy measurements, coupled with Ar+ ion sputtering. The present findings support the model for the porous layer of oxidized samples of Si grains embedded in a silica gel matrix.
X-ray photoelectron spectroscopy characterization of stain-etched luminescent porous silicon films
G Righini;
1999
Abstract
The surface and in-depth chemical nature of the photoluminescent stained Si layer obtained with a novel procedure based on HF/HNO3 is presented. Oxide-free porous Si surfaces result from controlled preparation, storing and handling of samples, as revealed by parallel X-ray photoelectron spectroscopy and X-ray-induced Auger electron spectroscopy measurements, coupled with Ar+ ion sputtering. The present findings support the model for the porous layer of oxidized samples of Si grains embedded in a silica gel matrix.File in questo prodotto:
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