Effect of Etching Time on Optical and Thermal Properties of p-Type Porous Silicon Prepared by Electrical Anodisation Method

Behzad, Kasra; Yunus, Wan Mahmood Mat; Talib, Zainal Abidin; Zakaria, Azmi; Bahrami, Afarin; Shahriari, Esmaeil

doi:10.1155/2012/581743

Cited by 11 publications

(4 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar result was reported by K. Behzad et al [16]. The observed average pore diameter, porosity and uniformity were higher than the reported values [17,18] avoid the formation of hydrogen bubbles during the etching process. These bubbles cover the surface and prevent electrolyte from reaching the surface that in turn results in inhomogeneities in the porous thin film [19].…”

Section: Resultssupporting

confidence: 88%

Fabrication of uniform-macroporous silicon and its possible application in hybrid solar cell

Islam

Ismail

2013

2013 2nd International Conference on Advances in Electrical Engineering (ICAEE)

View full text Add to dashboard Cite

This report presents the fabrication of uniformmacroporus-silicon (macro-PSi) using a chemical route. Electrochemical etching of the silicon wafer with Dimethyl sulfoxide (DMSO) was utilized to fabricate macro-PSi. Almost uniform pore formation was observed by Scanning Electron Microscope (SEM). The pore-size distribution calculated from the SEM image clearly shows the nearly uniform nature of the fabricated macro-PSi. The uniform-porosity can be tuned well via adjusting the etching current and time. The fabricated macro-PSi with Aluminium (Al) as the back-contact was applied as a cathode of bulk-heterojunction organic solar cell to exploit the high-specific area of the macro-PSi for efficient charge collection. An enhancement in short-circuit current indicates an enhancement in the charge collection efficiency using macro-PSi as cathode.

show abstract

Section: Resultssupporting

confidence: 88%

Fabrication of uniform-macroporous silicon and its possible application in hybrid solar cell

Islam

Ismail

2013

2013 2nd International Conference on Advances in Electrical Engineering (ICAEE)

View full text Add to dashboard Cite

show abstract

“…As etching time increases [9,11], and due to prosity increase [5,6,12] blue shift in PL .Specific surface area decreases with increasing porosity [3,4] as as concluded in many studies.…”

Section: Resultsmentioning

confidence: 84%

“…In this study, we report the change in porosity due to the etching time which causes shift in PL peak wavelengths [9][10][11][12]. We used the AFM 3-D measurements in order to calculate porosity and specific surface area that can be easily applied and also a non destructive method to derive the relationship.…”

Section: Introductionmentioning

confidence: 99%

Porous Silicon: Volume-Specific Surface Area Determination from AFM Measurement Data

Doğan¹,

Akin²,

Başköse³

et al. 2013

JMSE-B

View full text Add to dashboard Cite

Porous silicon layers manufactured by using (100), 1-5 ohm•cm p-type (boron doped) wafer by electrochemical etching in HF etanol solution. Photoluminescence (PL) spectra of anodically etched silicon obtained for different conditions studied and surface characteristics are investigated by AFM. This study gives a simple way to determine specific surface are of porous silicon which plays a major role with porosity for explaining the blue shift in photoluminescence peak. Properties such as specific surface area, pore size, and pore size distribution, the main surface properties of layer are investigated from AFM data which are important material characteristics in many processing applications. The "specific surface area" (S specific) generally defined as the area of solid surface per unit mass of material, solid volume or cross section area. From 3-D reconstructions of AFM data, the surface area and the volume of the porous layer can be estimated directly and volume-surface specific area is calculated. For porous silicon this feature can be defined as the total surface area per volume and given by the unit m 2 /cm 3. The method is simple not need to construct a special set up for measurement and non destructive.

show abstract

“…3a). This structure is the characteristic of the surface morphology of p-Si that formed by the interconnected pillars of silicon crystal [17]. The size of the pillars that formed this porous structure is varied from 25 to 50 nm.…”

Section: Resultsmentioning

confidence: 98%

Effect of Electrochemical Reaction Enviroment on the Surface Morphology and Photoluminescence of Porous Silicon

Syari’ati

Suendo

2013

MSF

View full text Add to dashboard Cite

Porous silicon (p-Si) is a well-known silicon based material that can emit visible light at room temperature. The radiative recombination that originated from quantum confinement effect shows photoluminescence (PL) in red, while the defect on silicon oxide at the surface of p-Si shows in blue-green region. Porous silicon can be synthesized through two methods; wet-etching and electrochemical anodization using hydrofluoric acid as the main electrolyte. The electrochemical anodization is more favorable due to faster etching rate at the surface than the conventional wet-etching method. The objective of this research is to show that both of porous silicons can be synthesized using the same main electrolyte but by varying the reaction environment during anodization/etching process. Here, we shows the wet-etching method that enhanced by polarization concentration will produce porous silicon with silicon oxide defects by means blue-green emission, while direct electrochemical anodization will produce samples that emit red PL signal. The effect of introducing KOH into the electrolyte was also studied in the case of enhanced-wet-etching method. Surface morphology of porous silicon and their photoluminescence were observed by Scanning Electron Microscope and PL spectroscopy, respectively.

show abstract

Effect of Etching Time on Optical and Thermal Properties of p-Type Porous Silicon Prepared by Electrical Anodisation Method

Cited by 11 publications

References 34 publications

Fabrication of uniform-macroporous silicon and its possible application in hybrid solar cell

Fabrication of uniform-macroporous silicon and its possible application in hybrid solar cell

Porous Silicon: Volume-Specific Surface Area Determination from AFM Measurement Data

Effect of Electrochemical Reaction Enviroment on the Surface Morphology and Photoluminescence of Porous Silicon

Contact Info

Product

Resources

About