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Core−Shell Nanorods for Efficient Photoelectrochemical Hydrogen Production

Z. G. Yu,*^† C. E. Pryor,^‡ W. H. Lau,^§ M. A. Berding,^† and D. B. MacQueen^†

SRI International, 333 Ravenswood Avenue, Menlo Park, California 94025, Optical Science and Technology Center and Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa 52242, and Center for Spintronics and Quantum Computation and Department of Physics, University of California, Santa Barbara, California 93106

J. Phys. Chem. B, 2005, 109 (48), pp 22913–22919

DOI: 10.1021/jp055205e

Publication Date (Web): November 12, 2005

To whom correspondence should be addressed. E-mail: zhi-gang.yu@sri.com.

†

SRI International.

‡

University of Iowa.

University of California, Santa Barbara.

Abstract

We propose core−shell InP−CdS and InP−ZnTe nanorods as photoelectrodes in the efficient photoelectrochemical hydrogen production. On the basis of our systematic study using strain-dependent k.p theory, we find that in these heterostructures both energies and wave function distributions of electrons and holes can be favorably tailored to a considerable extent by exploiting the interplay between quantum confinement and strain. Consequently, these core−shell nanorods with proper dimensions (height, core radius, and shell thickness) can simultaneously satisfy all criteria for effective photoelectrodes in solar-based hydrogen production.

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Published In Issue December 08, 2005
Received September 14, 2005
Revised October 13, 2005

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Article

Core−Shell Nanorods for Efficient Photoelectrochemical Hydrogen Production