Enhancement of antireflection property of silicon using nanostructured surface combined with a polymer deposition

Ha, Ji Soo; Yoo, Sung Ho; Cho, Jong Hoi; Cho, Yong-Hoon; Cho, Sung Oh

doi:10.1186/1556-276x-9-9

Cited by 19 publications

(9 citation statements)

References 28 publications

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“…For a solar module with an efficiency of 20%, 1% improvement on efficiency can correspond to 5% reduction in cost. Surface structures [ 1 – 3 ] and passivation [ 4 – 7 ] can be utilized to improve the efficiency. Passivation of bare Si surfaces can be easily achieved with hydrogen termination, alkylation, and so on, but the effect may deteriorate in a certain time [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Passivation ability of graphene oxide demonstrated by two-different-metal solar cells

et al. 2014

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The study on graphene oxide (GO) grows rapidly in recent years. We find that graphene oxide could act as the passivation material in photovoltaic applications. Graphene oxide has been applied on Si two-different-metal solar cells. The suitable introduction of graphene oxide could result in obvious enhancement on the efficiency. The simple chemical process to deposit graphene oxide makes low thermal budget, large-area deposition, and fast production of surface passivation possible. The different procedures to incorporate graphene oxide in Si two-different-metal solar cells are compared, and 21% enhancement on the efficiency is possible with a suitable deposition method.

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Section: Introductionmentioning

confidence: 99%

Passivation ability of graphene oxide demonstrated by two-different-metal solar cells

et al. 2014

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“…These materials have been featured with unparalleled structural amenability, exceptionally high specific surface area 11 , unusual size-dependent effects 12 , and excellent mechanical and electrical properties 13 14 . Therefore, there have been many attempts to take advantage of various 2D nanomaterials as delivery platforms, diagnostic agents, therapeutic nanodrugs, and tissue engineering scaffolds 15 16 17 18 19 20 21 .…”

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confidence: 99%

Robust Denaturation of Villin Headpiece by MoS2 Nanosheet: Potential Molecular Origin of the Nanotoxicity

Yang

Kang

et al. 2016

Sci Rep

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MoS2 nanosheet, a new two-dimensional transition metal dichalcogenides nanomaterial, has attracted significant attentions lately due to many potential promising biomedical applications. Meanwhile, there is also a growing concern on its biocompatibility, with little known on its interactions with various biomolecules such as proteins. In this study, we use all-atom molecular dynamics simulations to investigate the interaction of a MoS2 nanosheet with Villin Headpiece (HP35), a model protein widely used in protein folding studies. We find that MoS2 exhibits robust denaturing capability to HP35, with its secondary structures severely destroyed within hundreds of nanosecond simulations. Both aromatic and basic residues are critical for the protein anchoring onto MoS2 surface, which then triggers the successive protein unfolding process. The main driving force behind the adsorption process is the dispersion interaction between protein and MoS2 monolayer. Moreover, water molecules at the interface between some key hydrophobic residues (e.g. Trp-64) and MoS2 surface also help to accelerate the process driven by nanoscale drying, which provides a strong hydrophobic force. These findings might have shed new light on the potential nanotoxicity of MoS2 to proteins with atomic details, which should be helpful in guiding future biomedical applications of MoS2 with its nanotoxicity mitigated.

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“…The increased roughness results in reduced reflectance (Fig. 4 (c)) and enhanced FOMs ( Similar mechanism has been utilized for enhanced absorption in solar cells, for example, by creating 'black Si' using anisotropic etching of surface [22], hydrogen etching [54], or mechanical grinding [23,55]. Furthermore, random roughness helps scatter light more efficiently than periodic structure due to a break in mirror symmetries (i.e.…”

Section: Light Absorbing Coating Structure Modificationmentioning

confidence: 87%

Black oxide nanoparticles as durable solar absorbing material for high-temperature concentrating solar power system

Moon

Kim

VanSaders

et al. 2015

Solar Energy Materials and Solar Cells

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Concentrating solar power is becoming an increasingly important part of the renewable energy portfolio. However, further cost reduction is desired to make CSP competitive with traditional energy technologies. Higher operating temperature is considered an attractive avenue leading to higher power conversion efficiency and lower cost, but tremendous technical challenges exist with higher temperature operation of CSP, with one of the main issues being the lack of a high-performance solar absorbing material that is durable at 750 o C or above. In this work, a black oxide material, made of cobalt oxide nanoparticles, is synthesized and utilized as a high-temperature solar absorbing material. The nanoparticles are embedded in a dielectric matrix through a scalable spray coating process. The top layer of the coating is further improved with light-trapping structures using sacrificial fillers introduced from the same coating process. After the surface modification of cobalt oxide coating, we achieved a high thermal efficiency of 88.2%. More importantly, the coating shows no degradation after 1,000-hour annealing at 750 o C in air, while the existing commercial light absorbing coating was reported to degrade by long-term exposure at high temperature. Our findings © 2015. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ 2 suggest that the materials and processes developed here are promising for solar absorbing coating for future high-temperature CSP systems.

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Enhancement of antireflection property of silicon using nanostructured surface combined with a polymer deposition

Cited by 19 publications

References 28 publications

Passivation ability of graphene oxide demonstrated by two-different-metal solar cells

Passivation ability of graphene oxide demonstrated by two-different-metal solar cells

Robust Denaturation of Villin Headpiece by MoS2 Nanosheet: Potential Molecular Origin of the Nanotoxicity

Black oxide nanoparticles as durable solar absorbing material for high-temperature concentrating solar power system

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