Fabrication of functional nanosized patterns with UV-curable polysilsesquioxane on photovoltaic protective glass substrates using hybrid nano-imprint lithography

Shin, Ju Hyeon; Go, Bit Na; Choi, Hak Jong; Cho, Joong Yeon; Lee, Albert S.; Hwang, Seung Sang; Jin, Hyuk; Lee, Heon

doi:10.1039/c4tc00101j

Cited by 17 publications

(11 citation statements)

References 27 publications

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“…At non-oblique angles the SWG AR surfaces show increases in power production of 3.8% over bare coverglass and 1.8% over the conventional ARC; at 80 • the conical and paraboloidal SWG AR surfaces show respective increases of 45.6% and 22.5% over bare coverglass and 35.1% and 12.0% over the conventional ARC. These calculated results are consistent with the experimental results of groups who have studied SWG AR surfaces for terrestrial applications [13][14][15]. The curves presented in Fig.…”

Section: Effects On Power Productionsupporting

confidence: 94%

“…These calculations are consistent with the experimental results of previous groups that have focused on the application of SWGs to improve power generation in terrestrial passive solar cells [13,15], however the use of SWGs to address power generation challenges for body mounted cells on board satellites has not yet been explored-despite the high degree of similarity between the two problems.…”

Section: Effects On Power Productionsupporting

confidence: 91%

“…It has been demonstrated that treating both sides of the coverglass with an SWG AR surface will effectively double the effect of a single SWG AR surface at the foremost interface [15]. The work by Shin et al therefore raises the tantalizing possibility that even greater increases in power production than we have calculated may be achieved, as this paper considers only the foremost interface and not the effect of incorporating a backward-facing SWG.…”

Section: Effects On Power Productionmentioning

confidence: 89%

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Increasing solar cell power production on micro and nano satellites using sub-wavelength gratings

Podmore

Lee

2015

2015 IEEE Aerospace Conference

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The application of 2-dimensional periodic arrays of sub-wavelength structures as anti-reflection surfaces at the interface between a vacuum and commercial solar cell coverglass is investigated. It is determined that compared to commercial anti-reflective coatings a single anti-reflective sub-wavelength grating will yield 3.7 to 7.1% total increase in power production during a 24 hour orbital period for a typical earth observing 3-U CubeSat. Sub-wavelength gratings are approximated as a many layered stack of thin films with refractive indices defined by their vertical position in the array and the grating fill factor at that position. The transmission of light between wavelengths of 350nm and 1800nm and incident angles 0-90 degrees is calculated by the transfer matrix method. The optimal periodicity, profile and height of the features for an antireflective sub-wavelength grating applied to a commercial triple junction solar cell in Air Mass 0 are explored by analysis of the transmission coefficient surfaces for various gratings, and two sub-wavelength grating surfaces are benchmarked against the performance of a MgF 2 thin film anti reflective coating, as well as uncoated cover glass. The AM0 solar spectrum is propagated through the transmission coefficients of the SWG surface as well as a model for the external quantum efficiency and heat loss of commercially available Triangular Advanced Solar Cells. The amount of light reaching the cells is then applied to the photo response of each sub cell to determine the expected increase in solar cell power production at incident angles from 0-90 degrees. The incident angles for solar panels mounted on 3-U CubeSats in typical earth observation orbits are determined and used to calculate the expected increase in average power production over orbit which is found to be between 3.7 and 7.1% of the total.

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Section: Effects On Power Productionsupporting

confidence: 94%

Section: Effects On Power Productionsupporting

confidence: 91%

Section: Effects On Power Productionmentioning

confidence: 89%

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Increasing solar cell power production on micro and nano satellites using sub-wavelength gratings

Podmore

Lee

2015

2015 IEEE Aerospace Conference

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“…However, as discussed by Turi (1981), CBD as a chemical deposition method is of greater commercial value than either thermal evaporation or sputtering due to its simplicity, convenience, low cost and low temperature. Recently, as described by Shin et al (2014), CBD is capable to produce thin films with good quality into surface of substrate materials that is performed through control of precipitation of the compounds from the solution. In addition, CBD has flexibility to control factors which can affect growth of thin films; some of these factors are thickness of film, rate of deposition and quality of crystallites, temperature, and concentration of film.…”

Section: Conventional Methodsmentioning

confidence: 99%

Application of polymers for coating of proppant in hydraulic fracturing of subterraneous formations: A comprehensive review

Zoveidavianpoor

Gharibi

2015

Journal of Natural Gas Science and Engineering

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“…Therefore, extensive efforts have been made to upgrade the performances of solar cover glass since the commercialization of silicon solar cell. At the first generation, extra white cover glasses with low iron oxide were typically used in solar panel to ensure the high solar energy transmittance . Low reflection was considered to be another essential criterion for the cover glasses.…”

Section: Introductionmentioning

confidence: 99%

Zeolite Crystals Embedded Nanotextured Coating with Hydrophobic Surface: An Innovation Toward Next Generation Solar Cover Glass for Efficient Light‐Harvesting

Das

2016

Adv Materials Inter

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the cover glasses. Therefore, the second generation was referred to the glasses with antirefl ective (AR) coatings. However, the normal AR coatings based on optical interference design (by controlling thickness and refractive index) are thin, possess low hardness, and fail to transmit sunlight with high percentage in the wide region of wavelength (400-2000 nm). [ 7,8,11 ] Furthermore, due to the comparatively smooth surface of conventional AR coating, the less favorable fl at angle radiations of sunlight cannot be captured as well as solar module suffers from the effi ciency loss by the overheating during constant exposure under sun. As an alternative to these AR coatings, millimeterscale textured cover glasses came into the market and being used at present as the third generation cover glass. Keeping in view the specifi c requirements of the optical performances, the structure of those millimeterscale textured cover glasses were found to be different with the variation of geometrical architecture of the patterns such as abrupt-shaped triangular form, smoothed-shaped sinusoidal form, grooves, direct pyramids, and inverse pyramids. [ 12,13 ] Except reduction of refl ection loss at the glass-air interface by light-trapping, [ 12,14 ] the third generation cover glasses have additional advantages of antidazzle and positive temperature effects. But fabrication of such textured cover glasses in large scale is time consuming, expensive, complicated process and needs a completely methodical controlled engineering or software based program. [ 13 ] Further, due to the extensive light scattering from such highly textured surface, this glass suffers from very poor visual transparency [ 15,16 ] to the normal human eyes which limits their additional outdoor applications. This millimeterscale textured surface also deteriorates further transparency due to easy deposition of dust particles. It is noteworthy here that the nanoscale architectures are promising to reduce light-refl ection with an enormous enlargement of the light-active surface area by lighttrapping and absorbing the maximum radiation of sunlight in solar cells. [1][2][3][4][5][6][17][18][19][20][21][22][23][24][25][26][27] Therefore, fabrication of a nanoscale textured coating on any low iron borosilicate glass with suffi cient transparency, hardness, and hydrophobicity could fulfi ll all the requirements of an effective solar cover glass useful for multiple solar functions. Moreover, it is expected that such nanoscale surface structure on the glass with increased surface area will allow a large area for heat exchange to keep the temperature of A zeolite crystals embedded nanotextured hard coating with hydrophobic surface is fabricated on low iron borosilicate glass to enhance the effi ciency of photovoltaic systems through advance light-trapping. The surface roughness generated from embedding 3D nanocrystals enhances absorption of sunlight by reducing refl ection loss, and capturing maximum incident light to construct higher electricity and passive solar gain. Fur...

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Fabrication of functional nanosized patterns with UV-curable polysilsesquioxane on photovoltaic protective glass substrates using hybrid nano-imprint lithography

Abstract: We fabricated moth-eye structures on photovoltaic (PV) protective glass, a hybrid nano-imprint lithography technique. The efficiency of the PV module with PV protective glass patterned on both sides was enhanced.

Cited by 17 publications

References 27 publications

Increasing solar cell power production on micro and nano satellites using sub-wavelength gratings

Increasing solar cell power production on micro and nano satellites using sub-wavelength gratings

Application of polymers for coating of proppant in hydraulic fracturing of subterraneous formations: A comprehensive review

Zeolite Crystals Embedded Nanotextured Coating with Hydrophobic Surface: An Innovation Toward Next Generation Solar Cover Glass for Efficient Light‐Harvesting

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