Surface-area-tuned, quantum-dot-sensitized heterostructured nanoarchitectures for highly efficient photoelectrodes

Sangbaek Park; Donghoe Kim; Chan Woo Lee; Seong Deok Seo; Hae Jin Kim; Hyun Soo Han; Kug Sun Hong; Dong Wan Kim

doi:10.1007/s12274-013-0381-z

Surface-area-tuned, quantum-dot-sensitized heterostructured nanoarchitectures for highly efficient photoelectrodes

Sangbaek Park, Donghoe Kim, Chan Woo Lee, Seong Deok Seo, Hae Jin Kim, Hyun Soo Han, Kug Sun Hong, Dong Wan Kim

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

26 Citations (Scopus)

Abstract

Harvesting solar energy to produce clean hydrogen from photoelectrolysis of water presents a valuable opportunity to find alternatives for fossil fuels. Three-dimensional nanoarchitecturing techniques can afford enhanced photoelectrochemical properties by improving geometrical and structural effects. Here, we report quantum-dot sensitized TiO₂-Sb:SnO₂ heterostructures as a model electrode to enable the optimization of the structural effects through the creation of a highly conductive pathway using a transparent conducting oxide (TCO), coupled with a high surface area, by introducing branching and low interfacial resistance via an epitaxial relationship. An examination of various morphologies (dot, rod, and lamella shape) of TiO₂ reveals that the rod-shaped TiO₂-Sb:SnO₂ is a more effective structure than the others. A photoelectrode fabricated using optimized CdS-TiO₂-Sb:SnO₂ produces a photocurrent density of 7.75 mA/cm² at 0.4 V versus a reversible hydrogen electrode. These results demonstrate that constructing a branched heterostructure based on TCO can realize highperformance photoelectrochemical devices. [Figure not available: see fulltext.]

Original language	English
Pages (from-to)	144-153
Number of pages	10
Journal	Nano Research
Volume	7
Issue number	1
DOIs	https://doi.org/10.1007/s12274-013-0381-z
Publication status	Published - 2014 Jan
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation (NRF) grant funded by the Republic of Korea government (MEST) (2012-0008669 (RIAM), 2012R1A2A2A01045382, and 2009-0094046). This work was also supported by the Global Frontier R&D Program on Center for Multiscale Energy System funded by the National Research Foundation under the Ministry of Education, Science and Technology, Republic of Korea (0420-20110156).

Keywords

antimony-doped tin oxide
hydrogen evolution
photoelectrochemical
quantum dot

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1007/s12274-013-0381-z

Cite this

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title = "Surface-area-tuned, quantum-dot-sensitized heterostructured nanoarchitectures for highly efficient photoelectrodes",

abstract = "Harvesting solar energy to produce clean hydrogen from photoelectrolysis of water presents a valuable opportunity to find alternatives for fossil fuels. Three-dimensional nanoarchitecturing techniques can afford enhanced photoelectrochemical properties by improving geometrical and structural effects. Here, we report quantum-dot sensitized TiO2-Sb:SnO2 heterostructures as a model electrode to enable the optimization of the structural effects through the creation of a highly conductive pathway using a transparent conducting oxide (TCO), coupled with a high surface area, by introducing branching and low interfacial resistance via an epitaxial relationship. An examination of various morphologies (dot, rod, and lamella shape) of TiO2 reveals that the rod-shaped TiO2-Sb:SnO2 is a more effective structure than the others. A photoelectrode fabricated using optimized CdS-TiO2-Sb:SnO2 produces a photocurrent density of 7.75 mA/cm2 at 0.4 V versus a reversible hydrogen electrode. These results demonstrate that constructing a branched heterostructure based on TCO can realize highperformance photoelectrochemical devices. [Figure not available: see fulltext.]",

keywords = "antimony-doped tin oxide, hydrogen evolution, photoelectrochemical, quantum dot",

author = "Sangbaek Park and Donghoe Kim and Lee, {Chan Woo} and Seo, {Seong Deok} and Kim, {Hae Jin} and Han, {Hyun Soo} and Hong, {Kug Sun} and Kim, {Dong Wan}",

note = "Funding Information: This work was supported by the National Research Foundation (NRF) grant funded by the Republic of Korea government (MEST) (2012-0008669 (RIAM), 2012R1A2A2A01045382, and 2009-0094046). This work was also supported by the Global Frontier R&D Program on Center for Multiscale Energy System funded by the National Research Foundation under the Ministry of Education, Science and Technology, Republic of Korea (0420-20110156).",

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doi = "10.1007/s12274-013-0381-z",

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AU - Park, Sangbaek

AU - Kim, Donghoe

AU - Lee, Chan Woo

AU - Seo, Seong Deok

AU - Kim, Hae Jin

AU - Han, Hyun Soo

AU - Hong, Kug Sun

AU - Kim, Dong Wan

N1 - Funding Information: This work was supported by the National Research Foundation (NRF) grant funded by the Republic of Korea government (MEST) (2012-0008669 (RIAM), 2012R1A2A2A01045382, and 2009-0094046). This work was also supported by the Global Frontier R&D Program on Center for Multiscale Energy System funded by the National Research Foundation under the Ministry of Education, Science and Technology, Republic of Korea (0420-20110156).

PY - 2014/1

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N2 - Harvesting solar energy to produce clean hydrogen from photoelectrolysis of water presents a valuable opportunity to find alternatives for fossil fuels. Three-dimensional nanoarchitecturing techniques can afford enhanced photoelectrochemical properties by improving geometrical and structural effects. Here, we report quantum-dot sensitized TiO2-Sb:SnO2 heterostructures as a model electrode to enable the optimization of the structural effects through the creation of a highly conductive pathway using a transparent conducting oxide (TCO), coupled with a high surface area, by introducing branching and low interfacial resistance via an epitaxial relationship. An examination of various morphologies (dot, rod, and lamella shape) of TiO2 reveals that the rod-shaped TiO2-Sb:SnO2 is a more effective structure than the others. A photoelectrode fabricated using optimized CdS-TiO2-Sb:SnO2 produces a photocurrent density of 7.75 mA/cm2 at 0.4 V versus a reversible hydrogen electrode. These results demonstrate that constructing a branched heterostructure based on TCO can realize highperformance photoelectrochemical devices. [Figure not available: see fulltext.]

AB - Harvesting solar energy to produce clean hydrogen from photoelectrolysis of water presents a valuable opportunity to find alternatives for fossil fuels. Three-dimensional nanoarchitecturing techniques can afford enhanced photoelectrochemical properties by improving geometrical and structural effects. Here, we report quantum-dot sensitized TiO2-Sb:SnO2 heterostructures as a model electrode to enable the optimization of the structural effects through the creation of a highly conductive pathway using a transparent conducting oxide (TCO), coupled with a high surface area, by introducing branching and low interfacial resistance via an epitaxial relationship. An examination of various morphologies (dot, rod, and lamella shape) of TiO2 reveals that the rod-shaped TiO2-Sb:SnO2 is a more effective structure than the others. A photoelectrode fabricated using optimized CdS-TiO2-Sb:SnO2 produces a photocurrent density of 7.75 mA/cm2 at 0.4 V versus a reversible hydrogen electrode. These results demonstrate that constructing a branched heterostructure based on TCO can realize highperformance photoelectrochemical devices. [Figure not available: see fulltext.]

KW - antimony-doped tin oxide

KW - hydrogen evolution

KW - photoelectrochemical

KW - quantum dot

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Surface-area-tuned, quantum-dot-sensitized heterostructured nanoarchitectures for highly efficient photoelectrodes

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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