Comparison of optical properties of Si and ZnO/CdTe core/shell nanowire arrays

Michallon, Jérôme; Zanuccoli, Mauro; Kaminski‐Cachopo, Anne; Consonni, Vincent; Morand, Alain; Bucci, Davide; Emieux, Fabrice; Szambolics, Helga; Perraud, Simon; Semenikhin, I.

doi:10.1016/j.mseb.2012.10.037

Cited by 18 publications

(18 citation statements)

References 32 publications

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“…To improve J sc further, the light absorption should be optimized. Reflectance below 10% should be achieved by using SiNWs with a larger diameter and a smaller pitch, according to simulation studies . However the subsequent deposition of a‐Si:H and AZO layers must remain conformal.…”

Section: Discussionmentioning

confidence: 99%

Enhanced photovoltaic performance of vapor–liquid–solid grown silicon nanowire array with radial heterojunction

Kohen

Morin

Faucherand

et al. 2014

Physica Status Solidi (a)

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Section: Discussionmentioning

confidence: 99%

Enhanced photovoltaic performance of vapor–liquid–solid grown silicon nanowire array with radial heterojunction

Kohen

Morin

Faucherand

et al. 2014

Physica Status Solidi (a)

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“…The fabrication of core-shell nanowire heterostructures can obey several motivations: [155,156] or ZnO/CdTe [157][158][159][160].…”

Section: Radial (Core-shell) Nanowire Photodetectorsmentioning

confidence: 99%

Nanowire photodetectors based on wurtzite semiconductor heterostructures

Spies¹,

Monroy²

2019

Semicond. Sci. Technol.

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Using nanowires for photodetection constitutes an opportunity to enhance the absorption efficiency while reducing the electrical cross-section of the device. They present interesting features like compatibility with silicon substrates, which offers the possibility of integrating detector and readout circuitry, and facilitates their transfer to flexible substrates. Within a nanowire, it is possible to implement axial and radial (coreshell) heterostructures. These two types can be combined to obtain three-dimensional carrier confinement (dot-in-a-wire). The incorporation of heterostructures in nanowire photodetectors opens interesting opportunities of application and performance improvement. Heterojunctions or type-II heterostructures favor the separation of the photogenerated electrons and holes, and the implementation of quantum dots in a nanowire can be applied to the development of quantum photodetectors. This paper provides a general review of latest progresses in nanowire photodetectors, including single nanowires and heterostructured nanowires.

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“…Once the geometrical dimensions of ZnO/CdTe core shell NW arrays were optimized by varying D and the D/P ratio as seen in Fig. 2(a) [20], the physical mechanisms responsible for light absorption were investigated via an optical mode analysis. Three types of optical modes propagating along z occur in any waveguides such as optical fibre or NW arrays: guided, radiated and evanescent modes.…”

Section: Optical Mode Analysismentioning

confidence: 99%

“…Importantly, the light trapping and absorption properties are strongly dependent upon the geometrical dimensions of ZnO NW arrays covered with the semiconducting absorbing shell, which should therefore be controlled and optimized. It has been shown that 1 μm-long ZnO NW arrays covered with CdTe semiconducting absorbing shells more efficiently absorb light than both 1 μm-long Si NW arrays and ZnO/CdTe planar layers with the same amount of materials [20].…”

Section: Introductionmentioning

confidence: 99%

Light trapping in ZnO nanowire arrays covered with an absorbing shell for solar cells

Michallon¹,

Bucci²,

Morand³

et al. 2014

Opt. Express

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The absorption properties of ZnO nanowire arrays covered with a semiconducting absorbing shell for extremely thin absorber solar cells are theoretically investigated by optical computations of the ideal short-circuit current density with three-dimensional rigorous coupled wave analysis. The effects of nanowire geometrical dimensions on the light trapping and absorption properties are reported through a comprehensive optical mode analysis. It is shown that the high absorptance of these heterostructures is driven by two different regimes originating from the combination of individual nanowire effects and nanowire arrangement effects. In the short wavelength regime, the absorptance is likely dominated by optical modes efficiently coupled with the incident light and interacting with the nearby nanowires (i.e. diffraction), induced by the period of core shell ZnO nanowire arrays. In contrast, in the long wavelength regime, the absorptance is governed by key optically guided modes, related to the diameter of individual core shell ZnO nanowires.

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Comparison of optical properties of Si and ZnO/CdTe core/shell nanowire arrays

Cited by 18 publications

References 32 publications

Enhanced photovoltaic performance of vapor–liquid–solid grown silicon nanowire array with radial heterojunction

Enhanced photovoltaic performance of vapor–liquid–solid grown silicon nanowire array with radial heterojunction

Nanowire photodetectors based on wurtzite semiconductor heterostructures

Light trapping in ZnO nanowire arrays covered with an absorbing shell for solar cells

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