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Title: Nanoporous Delafossite CuAlO 2 from Inorganic/Polymer Double Gels: A Desirable High-Surface-Area p-Type Transparent Electrode Material

Abstract

Nanoporous structures of a p-type semiconductor, delafossite CuAlO 2, with a high crystallinity have been fabricated through an inorganic/polymer double-gel process and characterized for the first time via Mott–Schottky measurements. The effect of the precursor concentration, calcination temperature, and atmosphere were examined to achieve high crystallinity and photoelectrochemical properties while maximizing the porosity. The optical properties of the nanoporous CuAlO 2 are in good agreement with the literature with an optical band gap of 3.9 eV, and the observed high electrical conductivity and hole concentrations conform to highly crystalline and well-sintered nanoparticles observed in the product. The Mott–Schottky plot from the electrochemical impedance spectroscopy studies indicates a flat-band potential of 0.49 V versus Ag/AgCl. It is concluded that CuAlO 2 exhibits band energies very close to those of NiO but with electrical properties very desirable in the fabrication of photoelectrochemical devices including dye-sensitized solar cells.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Center for Bio-Inspired Solar Fuel Production (BISfuel)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1370502
DOE Contract Number:
SC0001016
Resource Type:
Journal Article
Resource Relation:
Journal Name: Inorganic Chemistry; Journal Volume: 54; Journal Issue: 3; Related Information: BISfuel partners with Arizona State University.
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; catalysis (homogeneous), catalysis (heterogeneous), solar (fuels), photosynthesis (natural and artificial), bio-inspired, hydrogen and fuel cells, electrodes - solar, charge transport, materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly)

Citation Formats

Das, Barun, Renaud, Adèle, Volosin, Alex M., Yu, Lei, Newman, Nathan, and Seo, Dong-Kyun. Nanoporous Delafossite CuAlO 2 from Inorganic/Polymer Double Gels: A Desirable High-Surface-Area p-Type Transparent Electrode Material. United States: N. p., 2015. Web. doi:10.1021/ic5023906.
Das, Barun, Renaud, Adèle, Volosin, Alex M., Yu, Lei, Newman, Nathan, & Seo, Dong-Kyun. Nanoporous Delafossite CuAlO 2 from Inorganic/Polymer Double Gels: A Desirable High-Surface-Area p-Type Transparent Electrode Material. United States. doi:10.1021/ic5023906.
Das, Barun, Renaud, Adèle, Volosin, Alex M., Yu, Lei, Newman, Nathan, and Seo, Dong-Kyun. Mon . "Nanoporous Delafossite CuAlO 2 from Inorganic/Polymer Double Gels: A Desirable High-Surface-Area p-Type Transparent Electrode Material". United States. doi:10.1021/ic5023906.
@article{osti_1370502,
title = {Nanoporous Delafossite CuAlO 2 from Inorganic/Polymer Double Gels: A Desirable High-Surface-Area p-Type Transparent Electrode Material},
author = {Das, Barun and Renaud, Adèle and Volosin, Alex M. and Yu, Lei and Newman, Nathan and Seo, Dong-Kyun},
abstractNote = {Nanoporous structures of a p-type semiconductor, delafossite CuAlO2, with a high crystallinity have been fabricated through an inorganic/polymer double-gel process and characterized for the first time via Mott–Schottky measurements. The effect of the precursor concentration, calcination temperature, and atmosphere were examined to achieve high crystallinity and photoelectrochemical properties while maximizing the porosity. The optical properties of the nanoporous CuAlO2 are in good agreement with the literature with an optical band gap of 3.9 eV, and the observed high electrical conductivity and hole concentrations conform to highly crystalline and well-sintered nanoparticles observed in the product. The Mott–Schottky plot from the electrochemical impedance spectroscopy studies indicates a flat-band potential of 0.49 V versus Ag/AgCl. It is concluded that CuAlO2 exhibits band energies very close to those of NiO but with electrical properties very desirable in the fabrication of photoelectrochemical devices including dye-sensitized solar cells.},
doi = {10.1021/ic5023906},
journal = {Inorganic Chemistry},
number = 3,
volume = 54,
place = {United States},
year = {Mon Feb 02 00:00:00 EST 2015},
month = {Mon Feb 02 00:00:00 EST 2015}
}