Comparison of optical absorption in Si nanowire and nanoporous Si structures for photovoltaic applications

Xiong, Zhaoming; Zhao, Fangyuan; Yang, Jiong; Hu, Xinhua

doi:10.1063/1.3427407

Cited by 54 publications

(26 citation statements)

References 24 publications

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“…For the optical characterization, Absorption and reflection spectra analysis are studied based on the effective medium theory [14]. According to this theory, to calculate the absorption and reflection spectra of the Si and Ge thin films, equation (1) to (3) …”

Section: Resultsmentioning

confidence: 99%

Theoretical limits of the multistacked 1D and 2D microstructured inorganic solar cells

et al. 2015

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Recent studies in monocrystalline semiconductor solar cells are focused on mechanically stacking multiple cells from different materials to increase the power conversion efficiency. Although, the results show promising increase in the device performance, the cost remains as the main drawback. In this study, we calculated the theoretical limits of multistacked 1D and 2D microstructered inorganic monocrstalline solar cells. This system is studied for Si and Ge material pair. The results show promising improvements in the surface reflection due to enhanced light trapping caused by photon-microstructures interactions. The theoretical results are also supported with surface reflection and angular dependent power conversion efficiency measurements of 2D axial microwall solar cells. We address the challenge of cost reduction by proposing to use our recently reported mass-manufacturable fracture-transfer-printing method which enables the use of a monocrystalline substrate wafer for repeated fabrication of devices by consuming only few microns of materials in each layer of devices. We calculated thickness dependent power conversion efficiencies of multistacked Si/Ge microstructured solar cells and found the power conversion efficiency to saturate at %26 with a combined device thickness of 30 μm. Besides having benefits of fabricating low-cost, light weight, flexible, semi-transparent, and highly efficient devices, the proposed fabrication method is applicable for other III-V materials and compounds to further increase the power conversion efficiency above 35% range.

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Section: Resultsmentioning

confidence: 99%

Theoretical limits of the multistacked 1D and 2D microstructured inorganic solar cells

et al. 2015

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“…The structures are impinged normally by a plane wave of light with wavelength of λ. When the wavelength is much larger than the structural period, the Si rod array and holey Si film can be viewed as homogeneous media with the effective dielectric constant given by [20][21][22][23] …”

Section: Resultsmentioning

confidence: 99%

“…(3) may be not accurate, when the Si rods or air holes are close to each other, or the period is comparable with the wavelength in silicon. Therefore, we apply a scattering-matrix method (SMM) 23,24 to accurately calculate the transmission T for different filling ratios f s . 121 plane waves have been used in the SMM simulations.…”

Section: Aip Advances 8 055328 (2018)mentioning

confidence: 99%

Design and fabrication of low-loss antireflection structures for Si windows in 10–30 THz

et al. 2018

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We report on the design, fabrication, and characterization of low-loss antireflection (AR) structures for Si windows in 10–30 THz. Based on scattering-matrix simulations and effective medium theory, optimal Si filling ratios are presented for AR structures composed of Si-rod arrays and holey-Si films with different periods. To reduce the difficulties in fabrications, we fabricated Si rod arrays with optimal AR parameters. Experiments show that by using a single layer of AR structure, the transmission of Si wafer can be enhanced by 38% at 20 THz, agreeing well with numerical simulations.

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“…Among the candidate materials, porous silicon (PSi) has attracted an increasing research interest, apart from its obvious potentially straightforward integration with standard Si technologies, thanks to its unique properties, and its present applications span from biomedicine (Anglin et al 2008) to biosensing, from photonics (Huy et al 2009) to photovoltaic devices (Xiong et al 2010). After its discovery (Uhlir 1956), porous silicon hasn't attracted much attention until the discovery of its room temperature luminescence properties (Canham 1990).…”

Section: Introductionmentioning

confidence: 99%

Porous Silicon-based Electrochemical Biosensors

Setzu¹,

Monduzzi²,

Mula³

et al. 2011

Biosensors - Emerging Materials and Applications

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Comparison of optical absorption in Si nanowire and nanoporous Si structures for photovoltaic applications

Cited by 54 publications

References 24 publications

Theoretical limits of the multistacked 1D and 2D microstructured inorganic solar cells

Theoretical limits of the multistacked 1D and 2D microstructured inorganic solar cells

Design and fabrication of low-loss antireflection structures for Si windows in 10–30 THz

Porous Silicon-based Electrochemical Biosensors

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