Broadening of Light Coupling to Waveguide Modes in Solar Cells by Disordered Grating Textures

Bittkau, Karsten; Hoffmann, André; Paetzold, Ulrich W.; Carius, R.

doi:10.3390/app7070725

Cited by 3 publications

(1 citation statement)

References 12 publications

(15 reference statements)

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“…The influence of the texturing scheme on light in-coupling, out-coupling, and trapping in different types of solar cell materials has been calculated and discussed extensively in the literature. ,,− The method with which light interacts with a surface and its geometry will impact how and where it is subsequently absorbed/re-emitted. Total internal reflection and light trapping are two parameters that can be manipulated on the basis of the surface geometrical configuration, which we find is exaggerated with larger pyramid sizes.…”

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confidence: 99%

Multimodal Microscale Imaging of Textured Perovskite–Silicon Tandem Solar Cells

et al. 2021

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Halide perovskite/crystalline silicon (c-Si) tandem solar cells promise power conversion efficiencies beyond the limits of single-junction cells. However, the local light-matter interactions of the perovskite material embedded in this pyramidal multijunction configuration, and the effect on device performance, are not well understood. Here, we characterize the microscale optoelectronic properties of the perovskite semiconductor deposited on different c-Si texturing schemes. We find a strong spatial and spectral dependence of the photoluminescence (PL) on the geometrical surface constructs, which dominates the underlying grain-to-grain PL variation found in halide perovskite films. The PL response is dependent upon the texturing design, with larger pyramids inducing distinct PL spectra for valleys and pyramids, an effect which is mitigated with small pyramids. Further, optimized quasi-Fermi level splittings and PL quantum efficiencies occur when the c-Si large pyramids have had a secondary smoothing etch. Our results suggest that a holistic optimization of the texturing is required to maximize light in- and out-coupling of both absorber layers and there is a fine balance between the optimal geometrical configuration and optoelectronic performance that will guide future device designs.

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confidence: 99%

Multimodal Microscale Imaging of Textured Perovskite–Silicon Tandem Solar Cells

et al. 2021

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Non-resonant dielectric metamaterials

Sprafke

Schilling

2020

Dielectric Metamaterials

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Effective light trapping in c-Si thin-film solar cells with a dual-layer split grating

Chen

Zheng

et al. 2021

Appl. Opt.

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We propose a dual-layer split nanograting structure in crystalline silicon thin-film solar cells (TFSCs). The split nanograting is designed by introducing two partitioning factors and split times. By employing the finite-difference time-domain method, the light trapping performance and relevant parameters of TFSCs are analyzed and optimized. Numerical computation of optical and electrical simulation shows that the optimal dual-layer split nanograting structure has demonstrated great enhanced light absorption compared with the planar structure. Enhancement of the light trapping effect is associated with light coupling to waveguide modes. The short-circuit current density is reached at 21.66 m A / c m 2 with an improvement of 54.6% over the planar structure. All results provide a parting thought for the design of TFSC grating structures.

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Broadening of Light Coupling to Waveguide Modes in Solar Cells by Disordered Grating Textures

Cited by 3 publications

References 12 publications

Multimodal Microscale Imaging of Textured Perovskite–Silicon Tandem Solar Cells

Multimodal Microscale Imaging of Textured Perovskite–Silicon Tandem Solar Cells

Non-resonant dielectric metamaterials

Effective light trapping in c-Si thin-film solar cells with a dual-layer split grating

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