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Effect of Nanotube Film Thickness on the Performance of Nanotube-Silicon Hybrid Solar Cells

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ABSTRACT

The results of measurements on solar cells made from randomly aligned thin films of single walled carbon nanotubes (SWCNTs) on n-type monocrystalline silicon are presented. The films are made by vacuum filtration from aqueous TritonX-100 suspensions of large diameter arc-discharge SWCNTs. The dependence of the solar cell performance on the thickness of the SWCNT film is shown in detail, as is the variation in performance due to doping of the SWCNT film with SOCl2.

No MeSH data available.


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(a) Dependence of the SWCNT films’ average optical depth on the volume of SWCNT suspension used per square centimeter of filtration membrane. The different symbols represent different treatments and show very that there is very little effect on the baseline visible absorption; (b) Variation of the sheet resistance with film transmission for as prepared (♦), HCl treated (●), SOCl2 treated (■) and HCl retreated (▲) devices. Inset shows the two regions of differing resistance for the doped films and the threshold transmittance (Tth) and corresponding sheet resistance (Rth).
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nanomaterials-03-00655-f002: (a) Dependence of the SWCNT films’ average optical depth on the volume of SWCNT suspension used per square centimeter of filtration membrane. The different symbols represent different treatments and show very that there is very little effect on the baseline visible absorption; (b) Variation of the sheet resistance with film transmission for as prepared (♦), HCl treated (●), SOCl2 treated (■) and HCl retreated (▲) devices. Inset shows the two regions of differing resistance for the doped films and the threshold transmittance (Tth) and corresponding sheet resistance (Rth).

Mentions: The linear relationship between absorbance and volume of SWCNT suspension shown in Figure 2a is expected from Beer’s law where the absorbance A is proportional to N, the number of absorbing units [36]. Although there is a logarithmic relationship between absorbance and transmittance, Tav is in the range of relative linearity (99% > T > 40%) with N. The very small difference between average absorbance before and after the various treatments is an indicator of the efficacy of the averaging process in removing the effect of the absorption peaks.


Effect of Nanotube Film Thickness on the Performance of Nanotube-Silicon Hybrid Solar Cells
(a) Dependence of the SWCNT films’ average optical depth on the volume of SWCNT suspension used per square centimeter of filtration membrane. The different symbols represent different treatments and show very that there is very little effect on the baseline visible absorption; (b) Variation of the sheet resistance with film transmission for as prepared (♦), HCl treated (●), SOCl2 treated (■) and HCl retreated (▲) devices. Inset shows the two regions of differing resistance for the doped films and the threshold transmittance (Tth) and corresponding sheet resistance (Rth).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5304592&req=5

nanomaterials-03-00655-f002: (a) Dependence of the SWCNT films’ average optical depth on the volume of SWCNT suspension used per square centimeter of filtration membrane. The different symbols represent different treatments and show very that there is very little effect on the baseline visible absorption; (b) Variation of the sheet resistance with film transmission for as prepared (♦), HCl treated (●), SOCl2 treated (■) and HCl retreated (▲) devices. Inset shows the two regions of differing resistance for the doped films and the threshold transmittance (Tth) and corresponding sheet resistance (Rth).
Mentions: The linear relationship between absorbance and volume of SWCNT suspension shown in Figure 2a is expected from Beer’s law where the absorbance A is proportional to N, the number of absorbing units [36]. Although there is a logarithmic relationship between absorbance and transmittance, Tav is in the range of relative linearity (99% > T > 40%) with N. The very small difference between average absorbance before and after the various treatments is an indicator of the efficacy of the averaging process in removing the effect of the absorption peaks.

View Article: PubMed Central - PubMed

ABSTRACT

The results of measurements on solar cells made from randomly aligned thin films of single walled carbon nanotubes (SWCNTs) on n-type monocrystalline silicon are presented. The films are made by vacuum filtration from aqueous TritonX-100 suspensions of large diameter arc-discharge SWCNTs. The dependence of the solar cell performance on the thickness of the SWCNT film is shown in detail, as is the variation in performance due to doping of the SWCNT film with SOCl2.

No MeSH data available.


Related in: MedlinePlus