Relation of defects and grain boundaries to transport and photo-transport: Solved and unsolved problems in microcrystalline silicon

Kočka, J.

doi:10.1016/j.jnoncrysol.2011.09.033

Cited by 8 publications

(2 citation statements)

References 59 publications

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“…Hydrogenated microcrystalline silicon ( c-Si:H) is a promising material for high efficiency thin-film solar cells due to its advantages of reduced light-induced degradation and a lower bandgap, which lead to a higher photocurrent compared to hydrogenated amorphous silicon [1][2][3][4][5][6]. However, the superstrate p-i-n c-Si:H solar cells are usually prepared by exposing the textured transparent conductive oxide (TCO) substrate to strongly hydrogen-diluted silane plasma.…”

Section: Introductionmentioning

confidence: 99%

Effect of TCO/μc-Si:H Interface Modification on Hydrogenated Microcrystalline Silicon Thin-Film Solar Cells

Liang

Hsu

Tsai

2013

International Journal of Photoenergy

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The effects of H2plasma exposure on optical, electrical, and structural properties of fluorine-doped tin oxide (FTO) and AZO/FTO substrates have been investigated. With increasing the time of H2-plasma exposure, the hydrogen radical and ions penetrated through the FTO surface to form more suboxides such as SnO and metallic Sn, which was confirmed by the XPS analysis. The Sn reduction on the FTO surface can be effectively eliminated by capping the FTO with a very thin layer of sputtered aluminum-doped zinc oxide (AZO), as confirmed by the XPS analysis. By using the AZO/FTO as front TCO with the subsequent annealing, the p-i-nμc-Si:H cell exhibited a significantly enhancedJSCfrom 15.97 to 19.40 mA/cm2and an increased conversion efficiency from 5.69% to 7.09%. This significant enhancement was ascribed to the effective elimination of the Sn reduction on the FTO surface by the thin AZO layer during the Si-based thin-film deposition with hydrogen-rich plasma exposure. Moreover, the subsequent annealing of the sputtered AZO could lead to less defects as well as a better interface of AZO/FTO.

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Section: Introductionmentioning

confidence: 99%

Effect of TCO/μc-Si:H Interface Modification on Hydrogenated Microcrystalline Silicon Thin-Film Solar Cells

Liang

Hsu

Tsai

2013

International Journal of Photoenergy

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“…Previous research on nc-Si:H has indicated that the inhomogeneity feature can form localized states within the energy gap. 6 Defects and grain boundaries play a crucial role in the transport of carries, which is important for most of the practical applications. Furthermore, when nc-Si:H films are used as a window layer or tunnel junction in a-Si based solar cells, 7 incorporation of oxygen into the nc-Si:H films can lower the optical absorption.…”

Section: Introductionmentioning

confidence: 99%

Relationship of microstructure properties to oxygen impurities in nanocrystalline silicon photovoltaic materials

Wen

Liu

et al. 2013

Journal of Applied Physics

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We have fully investigated the correlation of microstructure properties and oxygen impurities in hydrogenated nanocrystalline silicon photovoltaic films. The achievement has been realized through a series of different hydrogen dilution ratio treatment by plasma enhanced chemical vapor deposition system. Raman scattering, x-ray diffraction, and ultraviolet-visible transmission techniques have been employed to characterize the physical structural characterization and to elucidate the structure evolution. The bonding configuration of the oxygen impurities was investigated by x-ray photoelectron spectroscopy and the Si-O stretching mode of infrared-transmission, indicating that the films were well oxidized in SiO 2 form. Based on the consistence between the proposed structure factor and the oxygen content, we have demonstrated that there are two dominant disordered structure regions closely related to the post-oxidation contamination: plate-like configuration and clustered microvoids. V

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2D Oxide Nanomaterials to Address the Energy Transition and Catalysis

et al. 2018

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2D oxide nanomaterials constitute a broad range of materials, with a wide array of current and potential applications, particularly in the fields of energy storage and catalysis for sustainable energy production. Despite the many similarities in structure, composition, and synthetic methods and uses, the current literature on layered oxides is diverse and disconnected. A number of reviews can be found in the literature, but they are mostly focused on one of the particular subclasses of 2D oxides. This review attempts to bridge the knowledge gap between individual layered oxide types by summarizing recent developments in all important 2D oxide systems including supported ultrathin oxide films, layered clays and double hydroxides, layered perovskites, and novel 2D-zeolite-based materials. Particular attention is paid to the underlying similarities and differences between the various materials, and the subsequent challenges faced by each research community. The potential of layered oxides toward future applications is critically evaluated, especially in the areas of electrocatalysis and photocatalysis, biomass conversion, and fine chemical synthesis. Attention is also paid to corresponding novel 3D materials that can be obtained via sophisticated engineering of 2D oxides.

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Relation of defects and grain boundaries to transport and photo-transport: Solved and unsolved problems in microcrystalline silicon

Cited by 8 publications

References 59 publications

Effect of TCO/μc-Si:H Interface Modification on Hydrogenated Microcrystalline Silicon Thin-Film Solar Cells

Effect of TCO/μc-Si:H Interface Modification on Hydrogenated Microcrystalline Silicon Thin-Film Solar Cells

Relationship of microstructure properties to oxygen impurities in nanocrystalline silicon photovoltaic materials

2D Oxide Nanomaterials to Address the Energy Transition and Catalysis

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