Journal
NANO ENERGY
Volume 1, Issue 5, Pages 696-705Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2012.07.002
Keywords
Electrodeposition; Atomic layer deposition; Polystyrene lithography; Urchin-like ZnO; Light scattering; Extremely thin absorber solar cells
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Funding
- SFOE (Swiss Federal Office for Energy) ETA Solar Cell project, Switzerland [103296]
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High surface area nanowire based architectures have been identified as important components for future optoelectronic nanodevices, solar cells, wettability coatings, gas sensors, and biofuel cells. Here we report a novel urchin-inspired nanowire architecture: its interwoven threedimensional, high-surface-area nanowire arrangement can be precisely controlled by using a combination of nanosphere lithography, low-temperature atomic layer deposition, and electrodeposition. The performance of monolayer arrays of urchin-inspired ZnO nanowire building blocks competes to that of planar nanowire carpets. We illustrate this capability by fabricating fully-inorganic extremely thin absorber solar cells using CdSe as absorber layer and CuSCN as hole-collector material. The light diffusion of the urchin-inspired nanowire arrays was varied from 15% to 35%. Homogenous absorption in the wavelength range 400-800 nm of up to 90% was obtained. Solar conversion efficiencies of similar to 1.33% were achieved. (C) 2012 Elsevier Ltd. All rights reserved.
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