Absorption enhancement in thin-film silicon solar cells with a Fourier-series based periodic array

Guo, Xiaowei; Wang, Dashuai; Xu, Wenlong; Li, Shaorong; Pu-ying, Tang

doi:10.1364/ome.7.000793

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…Surface modification is commonly made on silicon substrates by plasma etching [ 23 , 24 ]. The structures used to enhance light absorption include nanowires [ 25 ], cones [ 26 , 27 ], pyramids [ 28 ], cosine surface arrays [ 29 ], and Fourier-series-based periodic arrays [ 30 ]. Another scheme to increase light absorption by thin films is reported in [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Optical Absorption Enhancement in CdTe Thin Films by Microstructuration of the Silicon Substrate

Rangel-Cárdenas

Sobral

2017

Materials

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In this work, the reflectance, optical absorption, and band gap have been determined for CdTe thin films grown on planar and microstructured substrates. The treated surface was prepared by laser ablation of a silicon wafer, forming holes in a periodic arrangement. Thin films were grown by pulsed laser ablation on silicon samples kept at 200 °C inside a vacuum chamber. The presence of CdTe was verified with X-ray diffraction and Raman spectroscopy indicating a nanocrystalline zinc blended structure. The optical absorption of thin films was calculated by using the Fresnel laws and the experimental reflectance spectrum. Results show that reflectance of 245 nm films deposited on modified substrates is reduced by up to a factor of two than the obtained on unchanged silicon and the optical absorption is 16% higher at ~456 nm. Additionally, it was determined that the band gap energy for planar and microstructured films is about 1.44 eV for both cases.

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Section: Introductionmentioning

confidence: 99%

Optical Absorption Enhancement in CdTe Thin Films by Microstructuration of the Silicon Substrate

Rangel-Cárdenas

Sobral

2017

Materials

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Effect of water flow in a solar still using novel materials

Suresh

Shanmugan

2019

J Therm Anal Calorim

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Subwavelength Periodic Structures Design and its Role in Photon Control of Thin Film Solar Cells

Wang

Shen

Wang

et al. 2020

NANO

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A subtle modification of the device surface is able to reduce optical loss and to further achieve high photoelectric conversion efficiency for thin film solar cells. This work shows the manipulation properties of subwavelength periodic structures on incident light at air/glass surface. In order to explore the mechanisms of optical loss, the spectral response and energy distribution of light are investigated by using rigorous coupled wave analysis and finite difference time domain methods. Calculation results show that the diffraction scattering and gradient refraction index play a significant role for better photon harvesting. With an optimized design of [Formula: see text][Formula: see text]nm, [Formula: see text], and hemispherical shape structure, obvious improvement in transmittance, external quantum efficiency and photo-generated current is achieved. The photoelectric conversion efficiencies of amorphous silicon thin film cells with an absorbing layer thickness of 400[Formula: see text]nm is 8.04%, improved by 5.9% compared with the flat cell of equivalent size.

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Absorption enhancement in thin-film silicon solar cells with a Fourier-series based periodic array

Cited by 4 publications

References 14 publications

Optical Absorption Enhancement in CdTe Thin Films by Microstructuration of the Silicon Substrate

Optical Absorption Enhancement in CdTe Thin Films by Microstructuration of the Silicon Substrate

Effect of water flow in a solar still using novel materials

Subwavelength Periodic Structures Design and its Role in Photon Control of Thin Film Solar Cells

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