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Radial junction silicon wire array solar cells fabricated by gold-catalyzed vapor-liquid-solid growth
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View: Figures


Image of FIG. 1.
FIG. 1.

Low magnification SEM image of an array of Si wires grown from a pattern with diameter pores with pitch, producing diameter wires. The size of the image is . Shown in the inset is a higher magnification image of the Si wires; the scale bar represents .

Image of FIG. 2.
FIG. 2.

SEM images of the Si wire tip: (a) after growth and cool-down showing the Au catalyst; (b) after removal of the Au catalyst showing the residue on the top of the Si wire; (c) after one oxidation and etch step which exposes Au particles; (d) after two successive oxidation and etch steps showing the complete removal of Au; (e) TEM image; and (f) EDS data from the residue on the top of wires confirming the presence of Au precipitates. The scale bars represent unless specified.

Image of FIG. 3.
FIG. 3.

(a) Semilog plot of the dark I-V data obtained from radial junction Si wire array solar cells. Devices fabricated after the Au etch step only (dashed line) result in nonrectifying behavior while an improvement in the diode characteristics is obtained following the oxidation and stripping process (solid line). The diode ideality factor is 3.4 and . (b) Light J-V characteristics obtained using a class A solar simulator for a radial junction solar cell fabricated using a Si wire array fabricated with wires in diameter, long, and a filling ratio of 10% with a total active array area of . The solar cell produced a of 0.5 V, of , FF of 57% and an efficiency of 2.3%.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Radial junction silicon wire array solar cells fabricated by gold-catalyzed vapor-liquid-solid growth