Formation of micrometer-sized electrical contacts on light-emitting porous silicon films

Huang, Yuan Ming; Zhou, Fengling; Zhai, Bao-gai; Chen, Lanli

doi:10.1016/j.ssi.2008.02.040

Cited by 21 publications

(18 citation statements)

References 12 publications

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“…On the basis of above discussions, we can understand why the PL of liquid crystal infiltrated porous silicon can be tunable within the entire visible spectral region. As reported in the literature, both doping with metallic ions and irradiation with energetic particles can severely decrease the PL of porous silicon [3,5,26,27]. Our repeated tests have revealed that the liquid crystal infiltration did not degrade the PL of porous silicon.…”

Section: Resultssupporting

confidence: 77%

“…In order to understand the origin of the 430 nm luminescent band we studied our porous silicon samples by Fourier transform infrared spectroscopy, and our results indicated that the porous silicon samples had been partially oxidized [26,27]. The additional luminescence band at about 430 nm can be attributed to the thin oxide layer because this luminescence band disappeared after the silicon oxide layer was removed with dilute hydrofluoric acid solution.…”

Section: Resultsmentioning

confidence: 96%

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Tunable photoluminescence of porous silicon by liquid crystal infiltration

Xiong

Huang

2011

Journal of Luminescence

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Section: Resultssupporting

confidence: 77%

Section: Resultsmentioning

confidence: 96%

Tunable photoluminescence of porous silicon by liquid crystal infiltration

Xiong

Huang

2011

Journal of Luminescence

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“…Therefore, it will be worthwhile to investigate the fractal features of a whole silica network by directly following the definition. The fractal dimension is a measure of the irregularity of the boundary of the object, and box-counting method is often employed to calculate the fractal dimension [9][10][11]. Fractal dimension, D, is defined as…”

Section: Resultsmentioning

confidence: 99%

Crack networks developed in thin films of silica-based photonic crystals

2008

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Submicrometer-sized silica spheres were synthesized by hydrolyzing and condensing tetraethyl orthosilicate in ethyl alcohol. If the resultant silica spheres were sticky, densely distributed cracks were developed in the silica-based thin films when sticky silica spheres were cast onto silicon wafers and then dried in oven at about 40 o C. If the resultant silica spheres were non-sticky, crack-free photonic crystals could be obtained when non-sticky silica spheres were cast onto glass substrates and then slowly dried in air. Characterized with the scanning electron microscopy and computer simulation, the characteristics of the cracks were analyzed and their fractal dimensions were calculated to be in the range of 2.4-2.7. Our results demonstrated that crack-free silica-based photonic crystals could be obtained by minimizing residual stresses in the thin films. The formation mechanisms of the cracks were discussed for the case of our silicabased thin films.

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“…The reason to incorporate thin layers can be manifold, for example, down-scaling [ 14 ], introducing novel technologies [ 15 ], increasing performance and stability. Another important feature when using thin polymer films is the ability to incorporate a huge variety of functional molecules which allow electrical [ 16 , 17 , 18 ], magnetic [ 19 ] or even color-like [ 20 ] like features in the thin layer. Performance and stability of these thin layers will be determined by their final structure and underlying physical processes.…”

Section: Introductionmentioning

confidence: 99%

NMR Profiling of Reaction and Transport in Thin Layers: A Review

et al. 2022

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Reaction and transport processes in thin layers of between 10 and 1000 µm are important factors in determining their performance, stability and degradation. In this review, we discuss the potential of high-gradient Nuclear Magnetic Resonance (NMR) as a tool to study both reactions and transport in these layers spatially and temporally resolved. As the NMR resolution depends on gradient strength, the high spatial resolution required in submillimeter layers can only be achieved with specially designed high-gradient setups. Three different high-gradient setups exist: STRAFI (STRay FIeld), GARField (Gradient-At-Right-angles-to-Field) and MOUSE (MObile Universal Surface Explorer). The aim of this review is to provide a detailed overview of the three techniques and their ability to visualize reactions and transport processes using physical observable properties such as hydrogen density, diffusion, T1- and T2-relaxation. Finally, different examples from literature will be presented to illustrate the wide variety of applications that can be studied and the corresponding value of the techniques.

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Formation of micrometer-sized electrical contacts on light-emitting porous silicon films

Cited by 21 publications

References 12 publications

Tunable photoluminescence of porous silicon by liquid crystal infiltration

Tunable photoluminescence of porous silicon by liquid crystal infiltration

Crack networks developed in thin films of silica-based photonic crystals

NMR Profiling of Reaction and Transport in Thin Layers: A Review

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