Lithium-doped nickel oxide for p-type dye-sensitized solar cell applications

Vinod E. Sandana; David J. Rogers; Ferechteh H. Teherani; Philippe Bove; Ryan McClintock; Manijeh Razeghi

doi:10.1117/12.2263713

3 April 2017 Imprinting of nanoporosity in lithium-doped nickel oxide through the use of sacrificial zinc oxide nanotemplates

Vinod E. Sandana, David J. Rogers, Ferechteh H. Teherani, Philippe Bove, Ryan McClintock, Manijeh Razeghi

Author Affiliations +

Proceedings Volume 10105, Oxide-based Materials and Devices VIII; 101052C (2017) https://doi.org/10.1117/12.2263713
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

Methods for simultaneously increasing the conductivity and the porosity of NiO layers grown by pulsed laser deposition (PLD) were investigated in order to develop improved photocathodes for p-DSSC applications. NiO:Li (20at%) layers grown on c-Al₂O₃ by PLD showed a sharp drop in conductivity with increasing substrate temperature. Layers grown at room temperature were more than two orders of magnitude more conductive than undoped NiO layers but did not show evidence of any porosity in Scanning Electron Microscope (SEM) images. A new method for imposing a nanoporosity in NiO was developed based on a sacrificial template of nanostructured ZnO. SEM images and EDX spectroscopy showed that a nanoporous morphology had been imprinted in the NiO overlayer after preferential chemical etching away of the nanostructured ZnO underlayer. Beyond p-DSSC applications, this new process could represent a new paradigm for imprinting porosity in a whole range of materials.

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Vinod E. Sandana, David J. Rogers, Ferechteh H. Teherani, Philippe Bove, Ryan McClintock, and Manijeh Razeghi "Imprinting of nanoporosity in lithium-doped nickel oxide through the use of sacrificial zinc oxide nanotemplates", Proc. SPIE 10105, Oxide-based Materials and Devices VIII, 101052C (3 April 2017); https://doi.org/10.1117/12.2263713

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KEYWORDS

Zinc oxide

Scanning electron microscopy

Nickel

Wet etching

Glasses

Nanostructuring

Sapphire

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