Ultrathin amorphous silicon thin-film solar cells by magnetic plasmonic metamaterial absorbers

Tang, Chaojun; Yan, Zhendong; Wang, Qiugu; Chen, Jing; Zhu, Mingwei; Liu, Bo; Liu, Fanxin; Sui, Chenghua

doi:10.1039/c5ra15177e

Cited by 23 publications

(13 citation statements)

References 61 publications

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“…One of the important applications is to design perfect metamaterial absorbers (MMAs), which can achieve near unity absorption by adjusting the geometric parameters of the MM’s unit-cell structure [ 5 , 6 ]. MMAs are considered to be a branch of MMs, since this has been demonstrated experimentally in the seminal work of Landy et al that recently provoked extensive interest due to its potential application in thermal emission, solar cells, imaging and sensing [ 5 , 6 , 7 , 8 , 9 , 10 , 11 ]. Since then, various MMA structures, such as split-ring and its derivative structure [ 12 , 13 , 14 , 15 ], cut-wire [ 16 , 17 ], ring-shape [ 18 , 19 , 20 ], and cross-shape [ 21 , 22 , 23 ] have been proposed intensively for the production of near perfect absorption with dual-/triple-/multi-/broad-band in a wide EM-spectrum range.…”

Section: Introductionmentioning

confidence: 99%

Ultra-Thin Multi-Band Polarization-Insensitive Microwave Metamaterial Absorber Based on Multiple-Order Responses Using a Single Resonator Structure

Cheng

Mao

et al. 2017

Materials

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We design an ultra-thin multi-band polarization-insensitive metamaterial absorber (MMA) using a single circular sector resonator (CSR) structure in the microwave region. Simulated results show that the proposed MMA has three distinctive absorption peaks at 3.35 GHz, 8.65 GHz, and 12.44 GHz, with absorbance of 98.8%, 99.7%, and 98.3%, respectively, which agree well with an experiment. Simulated surface current distributions of the unit-cell structure reveal that the triple-band absorption mainly originates from multiple-harmonic magnetic resonance. The proposed triple-band MMA can remain at a high absorption level for all polarization of both transverse-electric (TE) and transverse-magnetic (TM) modes under normal incidence. Moreover, by further optimizing the geometric parameters of the CSRs, four-band and five-band MMAs can also be obtained. Thus, our design will have potential application in detection, sensing, and stealth technology.

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Section: Introductionmentioning

confidence: 99%

Ultra-Thin Multi-Band Polarization-Insensitive Microwave Metamaterial Absorber Based on Multiple-Order Responses Using a Single Resonator Structure

Cheng

Mao

et al. 2017

Materials

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“…3(c) and (d) ). Such a field distribution is closely related to the excitation of a magnetic dipole 65 – 67 . To further demonstrate that the broad reflection dip is closely related to the excitation of a magnetic dipolar mode, we have also calculated the radiated power from electric dipolar moment I p , magnetic dipolar moment I m , electric quadrupole dipolar moment I EQ , and magnetic quadrupole dipolar moment I MQ , by using the equations of conventional multipole expansion 68 .…”

Section: Discussionmentioning

confidence: 99%

Electrically Tunable Fano Resonance from the Coupling between Interband Transition in Monolayer Graphene and Magnetic Dipole in Metamaterials

Liu

Tang

Chen

et al. 2017

Sci Rep

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Fano resonance modulated effectively by external perturbations can find more flexible and important applications in practice. We theoretically study electrically tunable Fano resonance with asymmetric line shape over an extremely narrow frequency range in the reflection spectra of metamaterials. The metamaterials are composed of a metal nanodisk array on graphene, a dielectric spacer, and a metal substrate. The near-field plasmon hybridization between individual metal nanodisks and the metal substrate results into the excitation of a broad magnetic dipole. There exists a narrow interband transition dependent of Fermi energy E f, which manifests itself as a sharp spectral feature in the effective permittivity ε g of graphene. The coupling of the narrow interband transition to the broad magnetic dipole leads to the appearance of Fano resonance, which can be electrically tuned by applying a bias voltage to graphene to change E f. The Fano resonance will shift obviously and its asymmetric line shape will become more pronounced, when E f is changed for the narrow interband transition to progressively approach the broad magnetic dipole.

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“…1 to 100 nm) the physical and chemical properties of the surface and interfaces are strongly enhanced compared to the bulk materials. In these systems, the phenomena such as quantum size effect and/or tunnelling effect for electron transfer [11] and shorter diffusion length for carriers [12], changes in transition temperature [13], crystallization [14], anisotropy of thermal conductivity [15] can occur. These properties are, in turn, strictly related to the crystal structure and chemical composition of ultrathin-film materials.…”

Section: Introductionmentioning

confidence: 99%

Infrared Absorption Study of Zn–S Hybrid and ZnS Ultrathin Films Deposited on Porous AAO Ceramic Support

2020

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Infrared (IR) spectroscopy is a powerful technique to characterize the chemical structure and dynamics of various types of samples. However, the signal-to-noise-ratio drops rapidly when the sample thickness gets much smaller than penetration depth, which is proportional to wavelength. This poses serious problems in analysis of thin films. In this work, an approach is demonstrated to overcome these problems. It is shown that a standard IR spectroscopy can be successfully employed to study the structure and composition of films as thin as 20 nm, when the layers were grown on porous substrates with a well-developed surface area. In contrast to IR spectra of the films deposited on flat Si substrates, the IR spectra of the same films but deposited on porous ceramic support show distinct bands that enabled reliable chemical analysis. The analysis of Zn-S ultrathin films synthesized by atomic layer deposition (ALD) from diethylzinc (DEZ) and 1,5-pentanedithiol (PDT) as precursors of Zn and S, respectively, served as proof of concept. However, the approach presented in this study can be applied to analysis of any ultrathin film deposited on target substrate and simultaneously on porous support, where the latter sample would be a reference sample dedicated for IR analysis of this film.

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Ultrathin amorphous silicon thin-film solar cells by magnetic plasmonic metamaterial absorbers

Abstract: Energy harvesting in metamaterial-based solar cells containing an ultrathin α-Si film sandwiched between a silver (Ag) substrate and a square array of Ag nanodisks and combined with an indium tin oxide (ITO) anti-reflection layer is investigated.

Cited by 23 publications

References 61 publications

Ultra-Thin Multi-Band Polarization-Insensitive Microwave Metamaterial Absorber Based on Multiple-Order Responses Using a Single Resonator Structure

Ultra-Thin Multi-Band Polarization-Insensitive Microwave Metamaterial Absorber Based on Multiple-Order Responses Using a Single Resonator Structure

Electrically Tunable Fano Resonance from the Coupling between Interband Transition in Monolayer Graphene and Magnetic Dipole in Metamaterials

Infrared Absorption Study of Zn–S Hybrid and ZnS Ultrathin Films Deposited on Porous AAO Ceramic Support

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