Anti-reflective structures for photovoltaics: Numerical and experimental design

Chee, Kuan W. A.; Tang, Zi‐Qiang; Lü, Hong; Huang, Fenglan

doi:10.1016/j.egyr.2018.02.002

Cited by 41 publications

(18 citation statements)

References 15 publications

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“…This could be realized by adjusting the peak positions and shapes by changing the thickness of the different AZO and Ag layers. Another approach is the tuning of the illuminating conditions or to apply anti reflection coatings [53,54]. By using structured surfaces, the angle distribution of the incoming light can be optimized with regard to the angular interval of ±50 • .…”

Section: Spectrally Selective Solar Cellsmentioning

confidence: 99%

Ultrathin Nano-Absorbers in Photovoltaics: Prospects and Innovative Applications

Götz¹,

Osterthun²,

Gehrke³

et al. 2020

Coatings

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Approaching the first terawatt of installations, photovoltaics (PV) are about to become the major source of electric power until the mid-century. The technology has proven to be long lasting and very versatile and today PV modules can be found in numerous applications. This is a great success of the entire community, but taking future growth for granted might be dangerous. Scientists have recently started to call for accelerated innovation and cost reduction. Here, we show how ultrathin absorber layers, only a few nanometers in thickness, together with strong light confinement can be used to address new applications for photovoltaics. We review the basics of this new type of solar cell and point out the requirements to the absorber layer material by optical simulation. Furthermore, we discuss innovative applications, which make use of the unique optical properties of the nano absorber solar cell architecture, such as spectrally selective PV and switchable photovoltaic windows.

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Section: Spectrally Selective Solar Cellsmentioning

confidence: 99%

Ultrathin Nano-Absorbers in Photovoltaics: Prospects and Innovative Applications

Götz¹,

Osterthun²,

Gehrke³

et al. 2020

Coatings

View full text Add to dashboard Cite

show abstract

“…While in the wavelength range of 1000-1200 nm, the overall differences of the quantum efficiency between each case begin to narrow slowly. Since the external quantum efficiency refers to the ratio of the available photocurrent (considering the internal recombination process) to the source photocurrent [23,27], namely:…”

Section: Effect Of Texture Shapes On Cell Performancementioning

confidence: 99%

Effect of front surface light trapping structures on the PERC solar cell

Zhou

Tan

Liu³

et al. 2020

SN Appl. Sci.

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Properties of the front textured surface shape and anti-reflection coating have a great impact on the performance of solar cells. In this paper, the simulation model of the minimum unit cell structure is established and validated, which is based on the framework of Silvaco software and basic parameters of the standard pyramid textures single crystalline silicon PERC solar cell. The effect of the front surface light trapping structures on cell performance is discussed. It is found that the slightly concave pyramid-like textures can improve the response for short wavelengths and the short-circuit current density of the cell is increased by 0.3 mA/cm 2 , which is improved by 0.80%. In addition, by properly controlling the preparation process of the anti-reflection coating, a gradient-index SiO x N y /Si 3 N 4 double-layer anti-reflection coating (DLARC) can be formed, which can significantly reduce the reflectivity for short wavelengths. And the short-circuit current density of the cell can be increased by 0.32 mA/cm 2 , which is improved by 0.86%. Finally, the optimized slightly concave pyramid-like textures and the SiO x N y /Si 3 N 4 DLARC can improve the photoelectric conversion efficiency of the PERC solar cell by 0.18% and 0.20%, respectively.

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“…The use of antireflection coating (ARC) is currently a most widely used method for reducing reflectivity of solar cells. The reflectivity reduction of most commercial silicon solar cells is based on single layer SiO 2 , S 3 N 4 and TiO 2 ARC [1]. The results published by G. Hashmi et al compare the influence of different ARC on the silicon reflectivity, from the above studies, the most significant reduction in reflectivity is observed for Si 3 N 4 ARC with a thickness of ∼ 74 nm.…”

Section: Introductionmentioning

confidence: 99%

Optical properties of electrochemically etched N-type silicon wafers for solar cell applications

Králik

Goraus

Pinčík

2020

Journal of Electrical Engineering

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The presented experiments and studies are intended for photovoltaic applications of crystalline silicon. This work deals with chemical treatment of the surface of n-type silicon wafers with different resistivity to reduce their reflectivity. Chemical surface treatment of silicon is an alternative method to using the antireflection layer. Optical losses caused by the reflection of light from the surface of the solar cells significantly reduce their efficiency. The investigated samples were prepared by the electrochemical etching method in the solution based on hydrofluoric acid and ethanol. The analysis of the prepared samples is divided into two parts, namely experimental measurements, and theoretical modeling. Experimental measurements are performed using UV-VIS spectroscopy, spectroscopic ellipsometry and SEM microscopy. Theoretical modeling is based on the construction and optimization of theoretical model of optical response (reflectivity and ellipsometric parameters) to determine the effective refractive index and thickness of formed structure. Effective refractive index of studied samples in theoretical model of optical response is based on Looyenga effective medium approximation and Tauc-Lorentz dispersion model.

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Anti-reflective structures for photovoltaics: Numerical and experimental design

Cited by 41 publications

References 15 publications

Ultrathin Nano-Absorbers in Photovoltaics: Prospects and Innovative Applications

Ultrathin Nano-Absorbers in Photovoltaics: Prospects and Innovative Applications

Effect of front surface light trapping structures on the PERC solar cell

Optical properties of electrochemically etched N-type silicon wafers for solar cell applications

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