A Cu2O/TiO2 heterojunction thin film cathode for photoelectrocatalysis

Withana Siripala; Anna Ivanovskaya; Thomas F. Jaramillo; Sung Hyeon Baeck; Eric W. McFarland

doi:10.1016/S0927-0248(02)00343-4

A Cu₂O/TiO₂ heterojunction thin film cathode for photoelectrocatalysis

Withana Siripala, Anna Ivanovskaya, Thomas F. Jaramillo, Sung Hyeon Baeck, Eric W. McFarland

University of California at Santa Barbara

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

444 Scopus citations

Abstract

A thin film heterojunction photocathode was developed consisting of 100 nm of n-type titanium dioxide (TiO₂) cathode surface deposited on p-type cuprous oxide (Cu₂O). The cuprous oxide was deposited electrochemically on Ti foil. A photocurrent of 0.7 mA/cm² (at-1 V bias) and an open circuit photovoltage of 460 mV were obtained under an illumination of 700 W/m². The photoresponse as a function of pH demonstrated that the TiO₂ film protected the Cu₂O underlayer against corrosion. These results suggest that using a simple and inexpensive heterostucture configuration, the corrosion limitations of Cu₂O alone may be overcome while maintaining a relatively high efficiency for photoelectrolysis.

Original language	English
Pages (from-to)	229-237
Number of pages	9
Journal	Solar Energy Materials and Solar Cells
Volume	77
Issue number	3
DOIs	https://doi.org/10.1016/S0927-0248(02)00343-4
State	Published - 30 May 2003
Externally published	Yes

Bibliographical note

Funding Information:
The research was supported by the Hydrogen Program of the Department of Energy (DOE, Grant No. DER-FC36-01G011092) and the NSF-MRSEC funded Materials Research Laboratory (UCSB).

Keywords

Heterojunction photocathode
Hydrogen
Photocatalyst
Photoelectrode

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/S0927-0248(02)00343-4

Cite this

@article{9d4eb5aa9e654de2986cbfa9d7d262c7,

title = "A Cu2O/TiO2 heterojunction thin film cathode for photoelectrocatalysis",

abstract = "A thin film heterojunction photocathode was developed consisting of 100 nm of n-type titanium dioxide (TiO2) cathode surface deposited on p-type cuprous oxide (Cu2O). The cuprous oxide was deposited electrochemically on Ti foil. A photocurrent of 0.7 mA/cm2 (at-1 V bias) and an open circuit photovoltage of 460 mV were obtained under an illumination of 700 W/m2. The photoresponse as a function of pH demonstrated that the TiO2 film protected the Cu2O underlayer against corrosion. These results suggest that using a simple and inexpensive heterostucture configuration, the corrosion limitations of Cu2O alone may be overcome while maintaining a relatively high efficiency for photoelectrolysis.",

keywords = "Heterojunction photocathode, Hydrogen, Photocatalyst, Photoelectrode",

author = "Withana Siripala and Anna Ivanovskaya and Jaramillo, \{Thomas F.\} and Baeck, \{Sung Hyeon\} and McFarland, \{Eric W.\}",

note = "Funding Information: The research was supported by the Hydrogen Program of the Department of Energy (DOE, Grant No. DER-FC36-01G011092) and the NSF-MRSEC funded Materials Research Laboratory (UCSB).",

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T1 - A Cu2O/TiO2 heterojunction thin film cathode for photoelectrocatalysis

AU - Siripala, Withana

AU - Ivanovskaya, Anna

AU - Jaramillo, Thomas F.

AU - Baeck, Sung Hyeon

AU - McFarland, Eric W.

N1 - Funding Information: The research was supported by the Hydrogen Program of the Department of Energy (DOE, Grant No. DER-FC36-01G011092) and the NSF-MRSEC funded Materials Research Laboratory (UCSB).

PY - 2003/5/30

Y1 - 2003/5/30

N2 - A thin film heterojunction photocathode was developed consisting of 100 nm of n-type titanium dioxide (TiO2) cathode surface deposited on p-type cuprous oxide (Cu2O). The cuprous oxide was deposited electrochemically on Ti foil. A photocurrent of 0.7 mA/cm2 (at-1 V bias) and an open circuit photovoltage of 460 mV were obtained under an illumination of 700 W/m2. The photoresponse as a function of pH demonstrated that the TiO2 film protected the Cu2O underlayer against corrosion. These results suggest that using a simple and inexpensive heterostucture configuration, the corrosion limitations of Cu2O alone may be overcome while maintaining a relatively high efficiency for photoelectrolysis.

AB - A thin film heterojunction photocathode was developed consisting of 100 nm of n-type titanium dioxide (TiO2) cathode surface deposited on p-type cuprous oxide (Cu2O). The cuprous oxide was deposited electrochemically on Ti foil. A photocurrent of 0.7 mA/cm2 (at-1 V bias) and an open circuit photovoltage of 460 mV were obtained under an illumination of 700 W/m2. The photoresponse as a function of pH demonstrated that the TiO2 film protected the Cu2O underlayer against corrosion. These results suggest that using a simple and inexpensive heterostucture configuration, the corrosion limitations of Cu2O alone may be overcome while maintaining a relatively high efficiency for photoelectrolysis.

KW - Heterojunction photocathode

KW - Hydrogen

KW - Photocatalyst

KW - Photoelectrode

UR - https://www.scopus.com/pages/publications/0037473597

U2 - 10.1016/S0927-0248(02)00343-4

DO - 10.1016/S0927-0248(02)00343-4

M3 - Article

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SN - 0927-0248

VL - 77

SP - 229

EP - 237

JO - Solar Energy Materials and Solar Cells

JF - Solar Energy Materials and Solar Cells

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ER -