Nano-textured polysilicon solar absorption films

Shih, Hsiao-Ku; Jiang, Yeu–Long

doi:10.1080/15435075.2016.1206015

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…There are two typical methods for wet etching to produce the texture structure on the surface of poly-Si. In our previous work [5], potassium hydroxide (KOH) had been used to form the nano-porous structure. However, it was found that on increasing the etching time, the width of the pore also increased along with the depth.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Nano-Porous Polysilicon Solar Absorption Films Prepared by Silver-Induced Etching

Jiang

Shih

2018

Crystals

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Nano-porous polysilicon high-temperature resistant solar absorption films were prepared by a thin layer of silver nanoparticles catalytic chemical etching. The polysilicon films with average tiny grain size of approximately 30 nm were obtained by high-temperature 800 °C furnace annealing of hydrogenated amorphous silicon films that were deposited on stainless substrate by plasma-enhanced chemical vapor deposition. The uniformly distributed 19 nm sized silver nanoparticles with 8 nm interspacing deposited on poly-Si film, were controlled by thin 4 nm thickness and very slow deposition rate 0.4 nm/min of thermal evaporation. Small silver nanoparticles with short spacing catalyzes the detouring etching process inducing the nano-porous textured surface with deep threaded pores. The etching follows the trail of the grain boundaries, and takes a highly curved thread like structure. The etching stops after reaching a depth of around 1100 nm, and the rest of the bulk thickness of the film remains mostly unaffected. The structure consists of three crystal orientations (111), (220), and (331) close to the surface. This crystalline nature diminishes gradually in the bulk of the film. High absorbance of 95% was obtained due to efficient light-trapping. Hence, preparation of nano-porous polysilicon films by this simple method can effectively increase solar absorption for the receiver of the solar thermal electricity Stirling Engine.

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Section: Introductionmentioning

confidence: 99%

Highly Efficient Nano-Porous Polysilicon Solar Absorption Films Prepared by Silver-Induced Etching

Jiang

Shih

2018

Crystals

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“…Polycrystalline silicon is among the materials that have a very important part in the industry, particularly for the manufacture of electronic components, integrated circuits and solar cells [1][2][3][4][5][6]. However, this material is characterised by a low photovoltaic efficiency in comparison with mono-crystalline silicon, due to the presence of grain boundaries.…”

Section: Introductionmentioning

confidence: 99%

Investigation of hydrogen effect on phosphorus-doped polysilicon thin films

Mekhalfa

Zaidi

Hadjoudja

et al. 2018

Surface Engineering

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Polycrystalline silicon is widely used in microelectronic and photovoltaic applications. The main problem of this material is the recombination of charge carriers at the grain boundaries which affects the efficiency of the polycrystalline silicon solar cells. In order to improve the crystalline quality and the electrical properties of phosphorus-doped poly-silicon thin films, heat treatments under hydrogen were carried out. This allowed the occupation of the dangling bonds at the grain boundaries and made them inactive, which resulted in improved optoelectronic properties of the treated samples. It has been shown that the effect of hydrogen on the electrical characteristics is more pronounced for low doping concentrations where a 20% improvement of the free carrier concentration was obtained. In addition, the results have shown that the introduction of hydrogen in poly-silicon thin films reduces the density of trap states at the grain boundaries.

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Nano-textured polysilicon solar absorption films

Cited by 2 publications

References 9 publications

Highly Efficient Nano-Porous Polysilicon Solar Absorption Films Prepared by Silver-Induced Etching

Highly Efficient Nano-Porous Polysilicon Solar Absorption Films Prepared by Silver-Induced Etching

Investigation of hydrogen effect on phosphorus-doped polysilicon thin films

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