Light scattering from black silicon surfaces and its benefits for encapsulated solar cells

Scheul, Tudor E.; Khorani, Edris; Rahman, Tasmiat; Charlton, Martin D. B.; Boden, Stuart A.

doi:10.1016/j.solmat.2021.111448

Cited by 12 publications

(4 citation statements)

References 21 publications

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“…This is believed to occur as a result of the different physical mechanisms of texture formation and how those textures scatter light. The metal assisted chemical texture, also known as black silicon, is a more statistical etching process (random process), with the resulting geometric shapes and reflection generally isotropic 9 . However, the alkaline texture used on the mono-crystalline wafers results in the formation of pyramidal shaped features.…”

Section: Discussionmentioning

confidence: 99%

Determining the optical properties of solar cells using low cost scanners

Juhl

Veettil

Scardera

et al. 2022

Sci Rep

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This paper investigates the use of consumer flatbed scanners for the use of monitoring solar cell precursors. Two types of scanners are investigated a contact image scanner and scanners with more conventional optical setups. The contact image sensor is found to be more suitable as it does not require additional flat field calibration. The scanners’ ability to monitor variation in sample texture was investigated by monitoring the reflection of multi-crystalline and mono-crystalline textured wafers. For a baseline, a comparison was made to a high-end tool used in industry. Both good qualitative agreement and statistical correlation were achieved between the scanner and industry tool for the isotropic multi-crystalline wafers.

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Section: Discussionmentioning

confidence: 99%

Determining the optical properties of solar cells using low cost scanners

Juhl

Veettil

Scardera

et al. 2022

Sci Rep

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“…This is a top-down process, which begins with nucleation at the surface using Ag nanoparticles, followed by etching with hydrofluoric acid. 37,38 This uses a solution of AgNO 3 and hydrofluoric (HF) acid and leaves grasslike nanowires, whereby the height is determined from the etch time and density from the AgNO 3 concentration. Post etching, the remaining Ag nanoparticles are removed using nitric acid.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Scalable Large-Area 2D-MoS₂/Silicon-Nanowire Heterostructures for Enhancing Energy Storage Applications

Zeimpekis,

Rahman,

Leung

et al. 2024

ACS Appl. Energy Mater.

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transition-metal dichalcogenides have shown great potential for energy storage applications owing to their interlayer spacing, large surface area-to-volume ratio, superior electrical properties, and chemical compatibility. Further, increasing the surface area of such materials can lead to enhanced electrical, chemical, and optical response for energy storage and generation applications. Vertical silicon nanowires (SiNWs), also known as black-Si, are an ideal substrate for 2D material growth to produce high surface-area heterostructures, owing to their ultrahigh aspect ratio. Achieving this using an industrially scalable method paves the way for next-generation energy storage devices, enabling them to enter commercialization. This work demonstrates large surface area, commercially scalable, hybrid MoS 2 /SiNW heterostructures, as confirmed by Raman spectroscopy, with high tunability of the MoS 2 layers down to the monolayer scale and conformal MoS 2 growth, parallel to the silicon nanowires, as verified by transmission electron microscopy (TEM). This has been achieved using a two-step atomic layer deposition (ALD) process, allowing MoS 2 to be grown directly onto the silicon nanowires without any damage to the substrate. The ALD cycle number accurately defines the layer number from monolayer to bulk. Introducing an ALD alumina (Al 2 O 3 ) interface at the MoS 2 / SiNW boundary results in enhanced MoS 2 quality and uniformity, demonstrated by an order of magnitude reduction in the B/A exciton photoluminescence (PL) intensity ratio to 0.3 and a reduction of the corresponding layer number. This high-quality layered growth on alumina can be utilized in applications such as for interfacial layers in high-capacity batteries or for photocathodes for water splitting. The alumina-free 100 ALD cycle heterostructures demonstrated no diminishing quality effects, lending themselves well to applications that require direct electrical contact with silicon and benefit from more layers, such as electrodes for highcapacity ion batteries.

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“…The ability to control relevant surface properties, such as cooling and light absorption, at the nanoscale level is essential for a wide variety of applications and fields, including thermodynamics, , energy development, , and materials science. − Evaporative cooling, also known as evaporative heat transfer, describes the natural process where a liquid changes its state to vapor, resulting in a local decrease in temperature. Hence, it plays a fundamental role in refrigeration and air conditioning systems, cooling towers for power plants, and thermal management of electronics .…”

Section: Introductionmentioning

confidence: 99%

High Aspect Ratio Nanoscale Pores through BCP-Based Metal Oxide Masks and Advanced Dry Etching

Esmeraldo Paiva,

Gerlt,

Läubli

et al. 2023

ACS Appl. Mater. Interfaces

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The reliable and regular modification of the surface properties of substrates plays a crucial role in material research and the development of functional surfaces. A key aspect of this is the development of the surface pores and topographies. These can confer specific advantages such as high surface area as well as specific functions such as hydrophobic properties. Here, we introduce a combination of nanoscale self-assembled block-copolymer-based metal oxide masks with optimized deep reactive ion etching (DRIE) of silicon to permit the fabrication of porous topographies with aspect ratios of up to 50. Following the evaluation of our procedure and involved parameters using various techniques, such as AFM or SEM, the suitability of our features for applications relying on high light absorption as well as efficient thermal management is explored and discussed in further detail.

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Light scattering from black silicon surfaces and its benefits for encapsulated solar cells

Cited by 12 publications

References 21 publications

Determining the optical properties of solar cells using low cost scanners

Determining the optical properties of solar cells using low cost scanners

Scalable Large-Area 2D-MoS₂/Silicon-Nanowire Heterostructures for Enhancing Energy Storage Applications

High Aspect Ratio Nanoscale Pores through BCP-Based Metal Oxide Masks and Advanced Dry Etching

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Light scattering from black silicon surfaces and its benefits for encapsulated solar cells

Cited by 12 publications

References 21 publications

Determining the optical properties of solar cells using low cost scanners

Determining the optical properties of solar cells using low cost scanners

Scalable Large-Area 2D-MoS2/Silicon-Nanowire Heterostructures for Enhancing Energy Storage Applications

High Aspect Ratio Nanoscale Pores through BCP-Based Metal Oxide Masks and Advanced Dry Etching

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Product

Resources

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Scalable Large-Area 2D-MoS₂/Silicon-Nanowire Heterostructures for Enhancing Energy Storage Applications