Photoelectrochemical Decomposition of Water Using Modified Monolithic Tandem Cells

Xiaoping Gao; Shyam Kocha; Arthur J. Frank; John A. Turner

doi:10.1016/S0360-3199(98)00052-4

Photoelectrochemical Decomposition of Water Using Modified Monolithic Tandem Cells

Xiaoping Gao, Shyam Kocha, Arthur J. Frank, John A. Turner

Chemistry and Nanoscience

Research output: Contribution to journal › Article › peer-review

35 Scopus Citations

Abstract

Photovoltaic tandem cells, consisting of a gallium indium phosphide (GaInP₂) homojunction grown epitaxially on a gallium arsenide (GaAs) homojunction with a GaAs tunnel diode interconnect, were modified with an additional top p-layer of GalnP₂. These cells were used as electrodes to photoelectrochemically decompose water into hydrogen and oxygen in 1 M, 5 M and 11 M KOH electrolyte solutions. The hydrogen reaction was catalyzed at the semiconductor surface with a photoelectrochemically deposited thin layer of platinum and ruthenium. Gas chromatography and electrochemical experiments demonstrate that the modified tandem cells produce hydrogen and oxygen with a light-to-hydrogen conversion efficiency of up to 6%. Both the efficiency and the stability of these cells are discussed.

Original language	American English
Pages (from-to)	319-325
Number of pages	7
Journal	International Journal of Hydrogen Energy
Volume	24
Issue number	4
DOIs	https://doi.org/10.1016/S0360-3199(98)00052-4 https://doi.org/10.1016/S0360-3199(98)00052-4
State	Published - 1999

NREL Publication Number

NREL/JA-590-24212

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title = "Photoelectrochemical Decomposition of Water Using Modified Monolithic Tandem Cells",

abstract = "Photovoltaic tandem cells, consisting of a gallium indium phosphide (GaInP2) homojunction grown epitaxially on a gallium arsenide (GaAs) homojunction with a GaAs tunnel diode interconnect, were modified with an additional top p-layer of GalnP2. These cells were used as electrodes to photoelectrochemically decompose water into hydrogen and oxygen in 1 M, 5 M and 11 M KOH electrolyte solutions. The hydrogen reaction was catalyzed at the semiconductor surface with a photoelectrochemically deposited thin layer of platinum and ruthenium. Gas chromatography and electrochemical experiments demonstrate that the modified tandem cells produce hydrogen and oxygen with a light-to-hydrogen conversion efficiency of up to 6%. Both the efficiency and the stability of these cells are discussed.",

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AU - Gao, Xiaoping

AU - Kocha, Shyam

AU - Frank, Arthur J.

AU - Turner, John A.

PY - 1999

Y1 - 1999

N2 - Photovoltaic tandem cells, consisting of a gallium indium phosphide (GaInP2) homojunction grown epitaxially on a gallium arsenide (GaAs) homojunction with a GaAs tunnel diode interconnect, were modified with an additional top p-layer of GalnP2. These cells were used as electrodes to photoelectrochemically decompose water into hydrogen and oxygen in 1 M, 5 M and 11 M KOH electrolyte solutions. The hydrogen reaction was catalyzed at the semiconductor surface with a photoelectrochemically deposited thin layer of platinum and ruthenium. Gas chromatography and electrochemical experiments demonstrate that the modified tandem cells produce hydrogen and oxygen with a light-to-hydrogen conversion efficiency of up to 6%. Both the efficiency and the stability of these cells are discussed.

AB - Photovoltaic tandem cells, consisting of a gallium indium phosphide (GaInP2) homojunction grown epitaxially on a gallium arsenide (GaAs) homojunction with a GaAs tunnel diode interconnect, were modified with an additional top p-layer of GalnP2. These cells were used as electrodes to photoelectrochemically decompose water into hydrogen and oxygen in 1 M, 5 M and 11 M KOH electrolyte solutions. The hydrogen reaction was catalyzed at the semiconductor surface with a photoelectrochemically deposited thin layer of platinum and ruthenium. Gas chromatography and electrochemical experiments demonstrate that the modified tandem cells produce hydrogen and oxygen with a light-to-hydrogen conversion efficiency of up to 6%. Both the efficiency and the stability of these cells are discussed.

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EP - 325

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 4

ER -

Photoelectrochemical Decomposition of Water Using Modified Monolithic Tandem Cells

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