Enhancement in photocurrent by dual-interface period-mismatched rotating rectangle grating-based c-Si solar cells

Chen, Ke; Wu, Shun; Yu, Yingchun; Zheng, Nianhong; Wu, Rui Yuan; Zheng, Hongmei

doi:10.1364/ao.423690

Cited by 1 publication

(4 citation statements)

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“…This may back to the small geometry of the active material, besides the light doping of the large core region ( ) as reported in Ref. 71 . Moreover, the highly doped thickness of the studied designs thickness are small and therefore the diffusion length exceed the active material thickness 71 .…”

Section: Resultsmentioning

confidence: 71%

“…Auger recombination (AR) plays a main process for TF Si SCs in high quality c-Si when the doping exceeds as reported in 71 . It depends only on the carrier density or heavy doping different from other recombination processes.…”

Section: Resultsmentioning

confidence: 96%

“… 71 . Moreover, the highly doped thickness of the studied designs thickness are small and therefore the diffusion length exceed the active material thickness 71 . For the axial junction (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…This may back to the increased n-doping shell volume for the proposed crescent NW design compared to in the conventional NW design at the core–shell junction. The Auger lifetime is decreased with the doping concentration and hence the Auger recombination rate is increased 71 . On the other hand, the proposed structure in the axial junction ( Fig.…”

Section: Resultsmentioning

confidence: 99%

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Electrical performance of efficient quad-crescent-shaped Si nanowire solar cell

El-Bashar

Hussein

Hegazy

et al. 2022

Sci Rep

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The electrical characteristics of quad-crescent-shaped silicon nanowire (NW) solar cells (SCs) are numerically analyzed and as a result their performance optimized. The structure discussed consists of four crescents, forming a cavity that permits multiple light scattering with high trapping between the NWs. Additionally, new modes strongly coupled to the incident light are generated along the NWs. As a result, the optical absorption has been increased over a large portion of light wavelengths and hence the power conversion efficiency (PCE) has been improved. The electron–hole (e–h) generation rate in the design reported has been calculated using the 3D finite difference time domain method. Further, the electrical performance of the SC reported has been investigated through the finite element method, using the Lumerical charge software package. In this investigation, the axial and core–shell junctions were analyzed looking at the reported crescent and, as well, conventional NW designs. Additionally, the doping concentration and NW-junction position were studied in this design proposed, as well as the carrier-recombination-and-lifetime effects. This study has revealed that the high back surface field layer used improves the conversion efficiency by $$\sim$$ ∼ 80%. Moreover, conserving the NW radial shell as a low thickness layer can efficiently reduce the NW sidewall recombination effect. The PCE and short circuit current were determined to be equal to 18.5% and 33.8 mA$$/\hbox {cm}^2$$ / cm 2 for the axial junction proposed. However, the core–shell junction shows figures of 19% and 34.9 mA$$/\hbox {cm}^2$$ / cm 2 . The suggested crescent design offers an enhancement of 23% compared to the conventional NW, for both junctions. For a practical surface recombination velocity of $$10^{2}$$ 10 2 cm/s, the PCE of the proposed design, in the axial junction, has been reduced to 16.6%, with a reduction of 11%. However, the core–shell junction achieves PCE of 18.7%, with a slight reduction of 1.6%. Therefore, the optoelectronic performance of the core–shell junction was marginally affected by the NW surface recombination, compared to the axial junction.

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