Hierarchical robust textured structures for large scale self-cleaning black silicon solar cells

Liu, Yan; Das, Arnab; Lin, Ziyin; Cooper, Ian B.; Rohatgi, A.; Wong, C.P.

doi:10.1016/j.nanoen.2013.11.002

Cited by 72 publications

(36 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further control over the optical properties of these surfaces therefore requires a hierarchical approach that combines two or more different nano/microstructuring techniques. 7,26 Additionally, to provide meaningful differentiation among the performance levels of the various anti-reflective layers, it is important to provide an analysis that goes beyond a basic treatment of the total reflectance by measuring the constituent specular and diffuse reflectance components of the layers and their total transmittance; then, based on these values, the absorbance of the layers can be deduced over the entire relevant wavelength region (from visible to mid-infrared).…”

Section: Introductionmentioning

confidence: 99%

Anti-reflective surfaces: Cascading nano/microstructuring

Nishijima¹,

Komatsu²,

Ota³

et al. 2016

APL Photonics

View full text Add to dashboard Cite

The creation of anti-reflective surfaces is reliant on the engineering of the surface textures and patterns to enable efficient trapping or transmission of light. Here we demonstrate anti-reflective layers composed of hierarchical nano/microscale features that are prepared on Si using a combination of wet and dry etching processes, and which are both scalable and affordable. The performance of the structured surfaces was tested through optical measurements of the reflectance, transmittance, and scattering spectra from the visible to mid-infrared wavelength regions, and the results were verified using numerical simulations to identify the performance of the textured anti-reflective layers. The anti-reflective properties of the layers were shown to be dramatically improved by the composite nanostructured surfaces over a broad spectral range, which thus provides a basis for the design rules that are essential for the progress towards effective anti-reflector fabrication. At normal incidence, the hierarchical surfaces achieve reflectances that are 10–80 times lower than that of conventional single-etch nano-microstructures. Portions of the absorbed, transmitted, scattered, and reflected light in the visible-IR spectrum are presented to illustrate the results.

show abstract

Section: Introductionmentioning

confidence: 99%

Anti-reflective surfaces: Cascading nano/microstructuring

Nishijima¹,

Komatsu²,

Ota³

et al. 2016

APL Photonics

View full text Add to dashboard Cite

show abstract

“…under finger pressing. This implies that the hard surface enables us to handle the device easily and to blow the dust off by using an air duster, which is of great advantage compared with other ultra-low reflectance materials (such as VACNT black and NiP black surface), and the mechanical stability is comparable to that of hierarchically textured black Si [15]. This characteristic is mainly attributed to the rigidity of the microstructured substrate as well as the mechanical properties of the DLC layer [30].…”

Section: Analysis Of the Experimental Results By Using Theoretical Simentioning

confidence: 99%

“…Vertically aligned carbon nanotube (VACNT) black [8,[10][11][12][13], black Si [1,4,14,15], gold black [16], and laser-ablated metal surfaces [2,17] exhibit low reflectance around or below 1% in the visible to near infrared (mid or far infrared in some cases) range of wavelengths.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of hard-coated optical absorbers with microstructured surfaces using etched ion tracks: Toward broadband ultra-low reflectance

Amemiya

Koshikawa

Yamaki

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

“…Ultralow reflectivity Si surfaces called black Si have been produced by fabrication of nanostructures on Si surfaces, e.g., porous Si using electrochemical etching [4,5], stain etching [3][4][5][6], Si nanowire [7,8], etc. Deposition of metals such as silver (Ag) and platinum (Pt) on Si immersed in hydrogen peroxide (H 2 O 2 ) plus hydrofluoric acid (HF) solutions forms porous structure because metals greatly enhance Si dissolution resulting in cylindrical pores formed by movement of metals into Si, i.e., metal-assisted chemical etching [9][10][11][12][13][14][15][16][17]. Formation of the nanostructure can greatly decrease the reflectivity, but results in large surface area, leading to a high surface recombination rate.…”

Section: Introductionmentioning

confidence: 99%

Surface nanocrystalline Si structure and its surface passivation for highly efficient black Si solar cells

Imamura

Irishika

Kobayashi

2017

Progress in Photovoltaics

View full text Add to dashboard Cite

19.5% conversion efficiency crystalline silicon (Si) solar cells having simple structure without antireflection coating have been fabricated using the surface structure chemical transfer method which produces a nanocrystalline Si layer simply by contacting catalytic platinum with Si wafers in hydrogen peroxide plus hydrofluoric acid solutions. The reflectivity becomes less than 3% after the surface structure chemical transfer method due to formation of black Si. Deposition of phosphosilicate glass and heat treatment at 925 °C performed for formation of pn‐junction effectively passivate the nanocrystalline Si surface. With this phosphosilicate glass passivation plus the hydrogen treatment at 400 °C, the internal quantum efficiency is greatly improved and reaches 81% at a wavelength of 400 nm. Analysis of ellipsometry data shows that incident light with wavelength shorter than 400 nm is almost completely absorbed by the nanocrystalline Si layer. The high internal quantum efficiency for short wavelength light is attributed to effective surface passivation and the nanocrystalline Si layer band‐gap energy which decreases with the distance from the top of the network structure of the nanocrystalline Si layer. Copyright © 2017 John Wiley & Sons, Ltd.

show abstract

Hierarchical robust textured structures for large scale self-cleaning black silicon solar cells

Cited by 72 publications

References 29 publications

Anti-reflective surfaces: Cascading nano/microstructuring

Anti-reflective surfaces: Cascading nano/microstructuring

Fabrication of hard-coated optical absorbers with microstructured surfaces using etched ion tracks: Toward broadband ultra-low reflectance

Surface nanocrystalline Si structure and its surface passivation for highly efficient black Si solar cells

Contact Info

Product

Resources

About