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Nanoscale photon management in silicon solar cells
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10.1116/1.4759260
/content/avs/journal/jvsta/30/6/10.1116/1.4759260
http://aip.metastore.ingenta.com/content/avs/journal/jvsta/30/6/10.1116/1.4759260
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Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Schematics of nanostructures with effective refractive index profile. (b) and (c) Optical abosprtion data. Measured absorption data of 1 μm thick amorphous Si with three different structures as a function of (b) wavelength and (c) incident angle. (d) Calculated absorption data of crystalline Si nancones with different thickness of substrates and crystalline Si planar structures with and without antireflction coating layers. Figures reproduced with permission: (a)–(c) from Zhu et al., Nano Lett. 9, 279 (2009). Copyright © 2009 by American Chemical Society; (d) from Jeong et al., Nano Lett. 12, 2971 (2012). Copyright © 2012 by American Chemical Society.

Image of FIG. 2.
FIG. 2.

(Color online) (a) and (b) Cross-sectional SEM images of (a) 2 μm long and (b) 5 μm long Si nanowires fabricated from 7.5 μm thick Si membrannes. (c) The characteristics of Si nanowire array solar cells fabricated from an 8 μm thick Si layer with three different roughness factors (RF) comapred to a planar structure (RF = 1). Figures reproduced with permission from Garnett and Yang, Nano Lett. 10, 1082 (2010). Copyright © 2010 by American Chemical Society.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Calculated absorption 2D contour of 700 nm wavelength light. Inset is a schematic of ordered nanowells with 2 μm depth. (b)and (c) Diffraction pattrens of (b) 1 μm and (c) 700 nm nanowell arrays generated by 650 nm diode laser. Figures reproduced with permission from Leung et al., Nano Lett. 12, 3682 (2012). Copyright © 2012 by American Chemical Society.

Image of FIG. 4.
FIG. 4.

(Color online) (a)–(c) Calculated Jsc of nanocone structures with different sizes. The total thickness of the structures is (a) 500 μm, (b) 50 μm, and (c) 10 μm. (d) Transmission data of the three nanocone structures studied in (b). Figures reproduced with permission from Jeong et al., Nano Lett. 12, 2971 (2012). Copyright © 2012 by American Chemical Society.

Image of FIG. 5.
FIG. 5.

(Color online) (a)–(c) Schematics and calculated optical absorption data of thin Si substrates with (a) double-sided grating, (b) top-only grating, and (c) bottom-only grating. (d) Schematic and calculated optical absorption data of a planar thin Si substrate. The unit of numbers in all the schematics is nm. The green and red lines in the absorption data represent the single-pass absorption and the Yablonovitch limit of 2 μm thick film, and the thin and thick black lines represent the absorption data from the structures and the running averages of the absorption, respectively. Figures reproduced with permission from Wang et al., Nano Lett. 12, 1616 (2012). Copyright © 2012 by American Chemical Society.

Image of FIG. 6.
FIG. 6.

(Color online) Simulated electric fields in a periodic nanodome structure of the a-Si:H solar cell for different wavelengths. Figure reproduced with permission from Zhu et al., Nano Lett. 10, 1979 (2010). Copyright © 2010 by American Chemical Society.

Image of FIG. 7.
FIG. 7.

(Color online) (a) Cross-sectional SEM image of a monolayer of Si spherical nanoshells. Scale bar is 300 nm. (b) Simulated electric fields in the nanoshell structure. (c) Measured optical absorption data of the nanoshells (red line) and a planar control sample (black line). (d) Electric fields coupled with a single Si nanoshell (inner radius Rin = 175 nm, outer radius Rout = 225 nm). The resonance wavelengths are 986 nm (second order), 796 nm (third order), and 685 nm (fourth order). Figures reproduced with permission from Yao et al., Nat. Commun. 3, 664 (2012). Copyright © 2012 by Nature Publishing Group.

Image of FIG. 8.
FIG. 8.

(Color online) (a)–(c) Cross-sectional SEM image of the a-Si:H solar cells fabricated on (a) a periodic nanocavity structure, (b) a random pyramid structure, and (c) a planar structure. (d) The external quantum efficiency and reflectance of the three devices plotted as a function of wavelength. Figures reproduced with permission from Battaglia et al., ACS Nano 6, 2790 (2012). Copyright © 2012 by American Chemical Society.

Image of FIG. 9.
FIG. 9.

(Color online) Schematics of colloidal lithography for making arrays of (a) nanowires, (b) nanocones, (c) nanowells, and (d) nanoshells.

Image of FIG. 10.
FIG. 10.

(Color online) (a) Schematics and corresponding cross-sectional SEM images of the oxidation process of Sn in a nitrogen gas environment with less than 100 ppm oxygen concentration. All scale bars are 100 nm. (b) Transmission measurement data of bare glass and glass with SnOx nanocones. (c) Absorption measurement data of polycrystalline Si substrates with and without SnOx nanocones. All the nanocones were fabricated from 50 nm thick Sn film. Figures reproduced with permission from Jeong et al., ACS Nano 5, 5800 (2011). Copyright © 2011 by American Chemical Society.

Image of FIG. 11.
FIG. 11.

(Color online) (a)–(c) Schematics and cross-sectional SEM images of a-Si:H solar cells on three different nanostructures: (a) nanopillar, (b) nanodomes, and (c) nanoconese. (d) The current density—voltage (J-V) characterstics of the three devices in (a)–(c). Figures reproduced with permission from Hsu et al., Adv. Energy Mater. 2, 628 (2012). Copyright © 2012 by John Wiley & Sons.

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2012-11-01
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Nanoscale photon management in silicon solar cells
http://aip.metastore.ingenta.com/content/avs/journal/jvsta/30/6/10.1116/1.4759260
10.1116/1.4759260
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