Optical properties of silicon-based materials: A comparison of porous and spark-processed silicon

Luminescence properties of spark-processed SiC

“…Sp-Si predominantly consists of amorphous SiO 2 , amorphous Si, nanocrystalline Si and Si oxy-nitrides, according to the report of Ludwig [20]. It should be pointed out here that the nanocrystallites did not generally present an orderly system, and their shape and sizes were distributed with a wide range.…”

“…A small atomic concentration of N of about 1.3 at.% is observed for the spark-processed 6H SiC. Spark-processed Si also displays a small incorporation of nitrogen in damaged region [20]. Relatively high amount of oxygen (over 42 at.%) is detected on the spark-processed SiC.…”

The effects of ZnO coating on the photoluminescence properties of porous silicon for the advanced optoelectronic devices

“…The discovery of strong visible photoluminescence (PL) at room temperature from electrochemically etched porous silicon (PS) has resulted in a great deal of attention because of the potential applications in Si-based optoelectronic devices especially blue and UV luminescence devices [1][2][3][4]. Even though the quantum confinement effect can explain the PL photon energy in the visible spectral region and has been widely recognized, serious contradictions exist between its predictions and a number of experimental results.…”

“…Even though the quantum confinement effect can explain the PL photon energy in the visible spectral region and has been widely recognized, serious contradictions exist between its predictions and a number of experimental results. In addition, different surface chemical species have been suggested to be the light emitting center for the visible PL, such as siloxene, hydride species or polysilanes or hydrogenated amorphous silicon [1][2][3][4]. Each model has its advantage in some specific cases, but meets difficulties in other cases.…”

n-PS/a-Si:H heterojunction for device application

“…Porous silicon (PS) consists of a complicated network of Si nanocrystallites (SiNCs) with nano/micro pores which shows interesting properties for both optical and electronic applications [1][2][3]. Particularly, its high surface to volume ratio and its high reactive surface strongly influences the gas sensing properties.…”