Absorption improvement of a-Si/c-Si rectangular nanowire arrays in ultrathin solar cells

Mortazavifar, Seyedeh Leila; Salehi, Mohammad Reza; Shahraki, Mojtaba; Abiri, Ebrahim

doi:10.1117/1.jpe.11.014502

Cited by 5 publications

(3 citation statements)

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“…The initial population for x,L,d parameters is produced randomly according to following constraints. (The best value of h is considered to be 200 nm according to similar articles and for the purpose of comparison 42 , 47 . 0<L<600 nm, 0<x<600 nm, 0<d<100 nm…”

Section: Pso Algorithmmentioning

confidence: 99%

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Light absorption enhancement of silicon solar cell based on horizontal nanowire arrays

et al. 2023

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.The effects of geometry and horizontal positioning of ultrathin triangular silicon nanowires (SiNWs) on the function of solar cells (SCs) have been investigated. Two differentiated methods have been presented to improve the current density of SiNW-SCs. First, a semiperiodic array is used for better utilization of the optical antenna effect. In the second method, several NWs with different geometries are used to achieve broadband absorption. The key to increase absorption is irregularity. Therefore, maximum light absorption is achieved by introducing irregular NWs. A set of optimized irregular NWs have better properties compared to other broadband structures. Using irregular NW arrays, the increase in the absorption of SCs can be improved without applying more absorbent materials. Optimization processes are used to obtain the maximum current density of SCs.

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Section: Pso Algorithmmentioning

confidence: 99%

“…Most of the studies on NWSCs are based on single NWs 44 – 47 Although single NWs can provide high absorption efficiency, this method is not feasible in practical applications. In a SC, a set of NWs are needed to increase absorption.…”

Section: Introductionmentioning

confidence: 99%

Light absorption enhancement of silicon solar cell based on horizontal nanowire arrays

et al. 2023

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“…Such features highlight the need for further NW cavity design and synthesis that could improve absorption efficiency and short-circuit current density (J SC ); and exceed conventional limits. Subsequently, a more innovative approach has come to the fore of attention, where, for example, a dielectric core-shell structure can balance the anti-reflection effect of dielectric materials and the enhancement of absorption induced by leaky mode resonances [17][18][19]. Moreover, tests in a different direction have been conducted to manipulate wire array configurations such as square, triangular, Penrose, and random structures [20].…”

Section: Introductionmentioning

confidence: 99%

Ultra-thin broadband solar absorber based on stadium-shaped silicon nanowire arrays

Mortazavifar

Salehi

Shahraki

et al. 2022

Front. Optoelectron.

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This paper investigates how the dimensions and arrangements of stadium silicon nanowires (NWs) affect their absorption properties. Compared to other NWs, the structure proposed here has a simple geometry, while its absorption rate is comparable to that of very complex structures. It is shown that changing the cross-section of NW from circular (or rectangular) to a stadium shape leads to change in the position and the number of absorption modes of the NW. In a special case, these modes result in the maximum absorption inside NWs. Another method used in this paper to attain broadband absorption is utilization of multiple NWs which have different geometries. However, the maximum enhancement is achieved using non-close packed NW. These structures can support more cavity modes, while NW scattering leads to broadening of the absorption spectra. All the structures are optimized using particle swarm optimizations. Using these optimized structures, it is viable to enhance the absorption by solar cells without introducing more absorbent materials. Graphical Abstract

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Design and optimization of hexagonal tungsten ring metasurface perfect absorbers with circuit model

Sarikhani,

Salehi,

Mortazavifar

et al. 2024

Surface & Interface Analysis

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In this paper, a perfect absorber (PA) based on tungsten is proposed to include hexagonal‐shaped metasurface absorbers with varying hole sizes ranging from quadrangular to circular, allowing them to cover a wide wavelength spectrum. The study investigates the effects of various parameters, including the number of sides of the inner hole, on the absorber's performance and identifies the most suitable absorber by introducing an equivalent circuit. The outcomes of full‐wave numerical simulations primarily based on the finite element method (FEM) highly correspond to the final results of the circuit model. Additionally, the circuit model significantly reduces computation time and requires less storage compared with full‐wave simulations. The results show that the hexagonal‐square metasurface absorber achieves exceptional absorption rates, with an average of 99.9% in the 431 to 532 nm wavelength range and over 90% in the 300 to 915 nm range. The hexagonal‐hexagonal metasurface absorber also exhibits high absorption rates, with an average of over 99% in the 431 to 518 nm and 700 to 780 nm ranges, and over 90% in the 300 to 940 nm range. The absorption performance of the proposed hexagonal‐circle metasurface absorber is also remarkable, with an absorption value of over 99% in the 670 to 771 nm range and above 90% in the 365 to 991 nm range. These models can be utilized to design and simulate other subwavelength absorbers in a broad frequency range, including terahertz and visible light, making them suitable for various applications.

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Absorption improvement of a-Si/c-Si rectangular nanowire arrays in ultrathin solar cells

Cited by 5 publications

References 0 publications

Light absorption enhancement of silicon solar cell based on horizontal nanowire arrays

Light absorption enhancement of silicon solar cell based on horizontal nanowire arrays

Ultra-thin broadband solar absorber based on stadium-shaped silicon nanowire arrays

Design and optimization of hexagonal tungsten ring metasurface perfect absorbers with circuit model

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