Preparation and Thermal Characterization of Annealed Gold Coated Porous Silicon

Materials

Kasra Behzad¹  Wan Mahmood Mat Yunus²  Zainal Abidin Talib¹  Azmi Zakaria¹ 

[1] Department of Physics, Science Faculty, Universiti Putra Malaysia, Serdang, Selangor 43400 UPM, Malaysia;

关键词: porous silicon;    thermal diffusivity;    gold;    photoacoustic spectroscopy;    annealing;    aging effect;   

DOI  :  10.3390/ma5010157

来源: mdpi

【 摘 要 】

Porous silicon (PSi) layers were formed on a p-type Si wafer. Six samples were anodised electrically with a 30 mA/cm² fixed current density for different etching times. The samples were coated with a 50–60 nm gold layer and annealed at different temperatures under Ar flow. The morphology of the layers, before and after annealing, formed by this method was investigated by scanning electron microscopy (SEM). Photoacoustic spectroscopy (PAS) measurements were carried out to measure the thermal diffusivity (TD) of the PSi and Au/PSi samples. For the Au/PSi samples, the thermal diffusivity was measured before and after annealing to study the effect of annealing. Also to study the aging effect, a comparison was made between freshly annealed samples and samples 30 days after annealing.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.