Nanowelded Carbon-Nanotube-Based Solar Microcells

Published:2012-10-23 20:11:00 From:Editor hits：

Photovoltaic (PV) cells are of immense interest due to their vast application potential in the fields of energy and communication.[1–3] The adoption of ideal photoactive material and the design of optimum device structure are critical to achieving low-cost, high-efficiency PV cells. The semiconducting single-walled carbon nanotubes (SWNTs) are potentially an attractive material for PV applications due to their many unique structural and electrical properties. They are almost defect free to greatly decrease carrier recombination, bear a wide range of direct bandgaps matching the solar spectrum,[4–6] and show strong photoabsorption[7–10] and photoresponse[11–15] from ultraviolet to infrared, and exhibit high carrier mobility [16] and reduced carrier transport scattering.[17,18] Indeed, previous studies had attempted to fabricate SWNT films into photoelectrochemical solar cells.[19] However, due to the inefficient separation and collection of photoexcited carriers and large intertube interaction, the maximum monochromatic incident photo-to-current conversion efficiency (IPCE) obtained for the cell is only 0.15%.

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Advanced Materials & New Energy & New Culture

Nanowelded Carbon-Nanotube-Based Solar Microcells