Angle-dependent reflectance measurements on photovoltaic materials and solar cells

Parretta, A.; Sarno, A.; Tortora, P.; Yakubu, Haruna; Maddalena, P.; Zhao, Jianhua; Wang, Aihua

doi:10.1016/s0030-4018(99)00561-1

Cited by 86 publications

(45 citation statements)

References 6 publications

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“…The simulated and measured curves match in the case of untextured Si, whereas a slight incongruity is seen for the 1.3 μm inverted-pyramid texture; this deviation is possibly due to our theoretical assumption of a square grid arrangement of inverted pyramids, whereas the laboratory sample had skewed alignment of adjacent rows due to the limited control available in the motion stages. The average specular reflectance over 280 nm-1000 nm for the AR coated (70 nm thick SiN x deposited by PECVD) texture with 1.13 μm inverted-pyramids lies below 2% for incidence angles of 8 • to 40 • and rapidly increases to 3%, 4.6% and 7.9% for incident angles of 48 • , 56 • and 64 • , respectively, indicating better optical performance when compared with the grid-less PERL-cell [19] that is also plotted in Figure 4b for comparison.…”

Section: Optical Performancementioning

confidence: 99%

Ultrafast laser direct hard-mask writing for high efficiency c-Si texture designs

et al. 2013

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This study reports a high-resolution hard-mask laser writing technique to facilitate the selective etching of crystalline silicon (c-Si) into an inverted-pyramidal texture with feature size and periodicity on the order of the wavelength which, thus, provides for both anti-reflection and effective light-trapping of infrared and visible light. The process also enables engineered positional placement of the invertedpyramid thereby providing another parameter for optimal design of an optically efficient pattern. The proposed technique, a non-cleanroom process, is scalable for large area micro-fabrication of high-efficiency thin c-Si photovoltaics. Optical wave simulations suggest the fabricated textured surface with 1.3 μm inverted-pyramids and a single anti-reflective coating increases the relative energy conversion efficiency by 11% compared to the PERL-cell texture with 9 μm inverted pyramids on a 400 μm thick wafer. This efficiency gain is anticipated to improve further for thinner wafers due to enhanced diffractive light trapping effects.

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Section: Optical Performancementioning

confidence: 99%

Ultrafast laser direct hard-mask writing for high efficiency c-Si texture designs

et al. 2013

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“…If the incidence angle is zero, the angle between the surface of the module and the direct component of radiation is 90 • . The reflectance at 633 nm of a polycrystalline silicon (p-Si) PV module is a function of the incidence angle as seen below in Figure 2 developed by Parretta et al [8]. This reflectance as a function of incidence angle was to determine how much of the direct insolation in the visible spectrum would be reflected off of the PV module and thus reach the observer.…”

Section: Pvmentioning

confidence: 99%

A Study of the Hazardous Glare Potential to Aviators from Utility-Scale Flat-Plate Photovoltaic Systems

Riley¹,

Olson²

2011

ISRN Renewable Energy

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The potential flash glare a pilot could experience from a proposed 25-degree fixed-tilt flat-plate polycrystalline PV system located outside of Las Vegas, Nevada, was modeled for the purpose of hazard quantification. Hourly insolation data measured via satellite for the years 1998 to 2004 was used to perform the modeling. The theoretical glare was estimated using published ocular safety metrics which quantify the potential for a postflash glare after-image. This was then compared to the postflash glare after-image potential caused by smooth water. The results show that the potential for hazardous glare from flat-plate PV systems is similar to that of smooth water and not expected to be a hazard to air navigation.

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“…Nanoscale texturing of silicon (Si) surfaces has been shown [1,2,3,4,5,6,7] to reduce the total weighted average optical reflectance to well below 1 % over a broad range of wavelengths and incident angles. Compared to the typical front surface reflectance of ∼ 2 and ∼ 8 %, from conventionally textured mono- [8] 5 and multi-crystalline [9] Si solar cells, respectively, nanoscale texturing such as described in [10,11,12] offers a potential of improved power conversion efficiency for Si solar cells due to reduced reflectance loss.…”

Section: Introductionmentioning

confidence: 99%

Black silicon laser-doped selective emitter solar cell with 18.1% efficiency

Davidsen

et al. 2016

Solar Energy Materials and Solar Cells

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We report fabrication of nanostructured, laser-doped selective emitter (LDSE) silicon solar cells with power conversion efficiency of 18.1 % and a fill factor (FF) of 80.1 %. The nanostructured solar cells were realized through a single step, mask-less, scalable reactive ion etch (RIE) texturing of the surface. The selective emitter was formed by means of laser doping using a continuous wave (CW) laser and subsequent contact formation using light-induced plating of Ni and Cu. The combination of RIE-texturing and a LDSE cell design has to our knowledge not been demonstrated previously. The resulting efficiency indicates a promising potential, especially considering that the cell reported in this work is the first proof-of-concept and that the fabricated cell is not fully optimized in terms of plating, emitter sheet resistance and surface passivation. Due to the scalable nature and simplicity of RIE-texturing as well as the LDSE process, we consider this specific combination a promising candidate for a cost-efficient process for future Si solar cells.

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Angle-dependent reflectance measurements on photovoltaic materials and solar cells

Cited by 86 publications

References 6 publications

Ultrafast laser direct hard-mask writing for high efficiency c-Si texture designs

Ultrafast laser direct hard-mask writing for high efficiency c-Si texture designs

A Study of the Hazardous Glare Potential to Aviators from Utility-Scale Flat-Plate Photovoltaic Systems

Black silicon laser-doped selective emitter solar cell with 18.1% efficiency

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