Electronic band structures and photovoltaic properties of MWO4 (M=Zn, Mg, Ca, Sr) compounds

Dong Wook Kim; In Sun Cho; Seong Sik Shin; Sangwook Lee; Tae Hoon Noh; Dong Hoe Kim; Hyun Suk Jung; Kug Sun Hong

doi:10.1016/j.jssc.2011.06.005

Electronic band structures and photovoltaic properties of MWO₄ (M=Zn, Mg, Ca, Sr) compounds

Dong Wook Kim, In Sun Cho, Seong Sik Shin, Sangwook Lee, Tae Hoon Noh, Dong Hoe Kim, Hyun Suk Jung, Kug Sun Hong

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

82 Citations (Scopus)

Abstract

Divalent metal tungstates, MWO₄, with wolframite (M=Zn and Mg) and scheelite (M=Ca and Sr) structures were prepared using a conventional solid state reaction method. Their electronic band structures were investigated by a combination of electronic band structure calculations and electrochemical measurements. From these investigations, it was found that the band structures (i.e. band positions and band gaps) of the divalent metal tungstates were significantly influenced by their crystal structural environments, such as the WO bond length. Their photovoltaic properties were evaluated by applying to the working electrodes for dye-sensitized solar cells. The dye-sensitized solar cells employing the wolframite-structured metal tungstates (ZnWO₄ and MgWO₄) exhibited better performance than those using the scheelite-structured metal tungstates (CaWO₄ and SrWO₄), which was attributed to their enhanced electron transfer resulting from their appropriate band positions.

Original language	English
Pages (from-to)	2103-2107
Number of pages	5
Journal	Journal of Solid State Chemistry
Volume	184
Issue number	8
DOIs	https://doi.org/10.1016/j.jssc.2011.06.005
Publication status	Published - 2011 Aug
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MEST) ( 2009-0092779 ) and this work was also supported by the Nano R&D program through the National Research Foundation of Korea funded by MEST ( 2009-0082659 ) and the research program 2009 of the Kookmin University in Korea.

Keywords

Divalent metal tungstate
Dye-sensitized solar cell
Electronic band structure

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

UN SDGs

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

Access to Document

10.1016/j.jssc.2011.06.005

Cite this

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title = "Electronic band structures and photovoltaic properties of MWO4 (M=Zn, Mg, Ca, Sr) compounds",

abstract = "Divalent metal tungstates, MWO4, with wolframite (M=Zn and Mg) and scheelite (M=Ca and Sr) structures were prepared using a conventional solid state reaction method. Their electronic band structures were investigated by a combination of electronic band structure calculations and electrochemical measurements. From these investigations, it was found that the band structures (i.e. band positions and band gaps) of the divalent metal tungstates were significantly influenced by their crystal structural environments, such as the WO bond length. Their photovoltaic properties were evaluated by applying to the working electrodes for dye-sensitized solar cells. The dye-sensitized solar cells employing the wolframite-structured metal tungstates (ZnWO4 and MgWO4) exhibited better performance than those using the scheelite-structured metal tungstates (CaWO4 and SrWO4), which was attributed to their enhanced electron transfer resulting from their appropriate band positions.",

keywords = "Divalent metal tungstate, Dye-sensitized solar cell, Electronic band structure",

author = "Kim, {Dong Wook} and Cho, {In Sun} and Shin, {Seong Sik} and Sangwook Lee and Noh, {Tae Hoon} and Kim, {Dong Hoe} and Jung, {Hyun Suk} and Hong, {Kug Sun}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MEST) ( 2009-0092779 ) and this work was also supported by the Nano R&D program through the National Research Foundation of Korea funded by MEST ( 2009-0082659 ) and the research program 2009 of the Kookmin University in Korea.",

year = "2011",

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doi = "10.1016/j.jssc.2011.06.005",

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journal = "Journal of Solid State Chemistry",

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AU - Noh, Tae Hoon

AU - Kim, Dong Hoe

AU - Jung, Hyun Suk

AU - Hong, Kug Sun

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MEST) ( 2009-0092779 ) and this work was also supported by the Nano R&D program through the National Research Foundation of Korea funded by MEST ( 2009-0082659 ) and the research program 2009 of the Kookmin University in Korea.

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N2 - Divalent metal tungstates, MWO4, with wolframite (M=Zn and Mg) and scheelite (M=Ca and Sr) structures were prepared using a conventional solid state reaction method. Their electronic band structures were investigated by a combination of electronic band structure calculations and electrochemical measurements. From these investigations, it was found that the band structures (i.e. band positions and band gaps) of the divalent metal tungstates were significantly influenced by their crystal structural environments, such as the WO bond length. Their photovoltaic properties were evaluated by applying to the working electrodes for dye-sensitized solar cells. The dye-sensitized solar cells employing the wolframite-structured metal tungstates (ZnWO4 and MgWO4) exhibited better performance than those using the scheelite-structured metal tungstates (CaWO4 and SrWO4), which was attributed to their enhanced electron transfer resulting from their appropriate band positions.

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