Porous Cu2BaSn(S,Se)4 Film as a Photocathode Using Non-Toxic Solvent and a Ball-Milling Approach

Song, Jiwoo; Teymur, Betul; Zhou, Yihao; Ngaboyamahina, Edgard; Mitzi, David B.

doi:10.1021/acsaem.0c01892

Title: Porous Cu₂BaSn(S,Se)₄ Film as a Photocathode Using Non-Toxic Solvent and a Ball-Milling Approach

Abstract

Cu₂BaSn(S,Se)₄ (CBTSSe) has been proposed as an alternative to Cu₂ZnSn(S,Se)₄ (CZTSSe) for solar absorbers due to its reduced propensity for antisite disorder and band tailing, while maintaining the desirable characteristics of band gap tunability, earth-abundance, and low toxicity constituent metals. However, current film deposition methods require high-vacuum conditions or toxic solvents, less desirable features for prospective large-scale production. Here, ball milling is demonstrated as a route towards a scalable processing method for CBTSSe, using a precursor ink consisting of common elements Cu₂S, BaS, Sn, and S in low-toxicity ethanol. A final film with a thickness and average grain size on the order of 1 µm was synthesized with a band gap of 1.56 eV, corresponding to a Cu₂BaSnS_4-xSe_x (x ≈ 3) stoichiometry. A porous CBTSSe photocathode with Pt/TiO₂/CdS overlayers was fabricated to demonstrate the photocurrent-generating capabilities of the film, yielding current densities of as high as 5.54 mA/cm² at 0 V versus a reversible hydrogen electrode (V/RHE) .

Authors:

Song, Jiwoo ^[1]; Teymur, Betul ^[1]; Zhou, Yihao ^[1]; Ngaboyamahina, Edgard ^[1];

^[1]

Duke Univ., Durham, NC (United States)

Publication Date:: Thu Jan 07 00:00:00 EST 2021

Research Org.:: Duke Univ., Durham, NC (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

OSTI Identifier:: 1783205

Grant/Contract Number:: SC0020061; ECCS-1542015

Resource Type:: Accepted Manuscript

Journal Name:: ACS Applied Energy Materials

Additional Journal Information:: Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2574-0962

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: English

Subject:: 14 SOLAR ENERGY; 36 MATERIALS SCIENCE; Photoelectrochemical; Milling; Porous; CBTS; CBTSSe; Cu2BaSn(S,Se)4

Citation Formats


                    Song, Jiwoo, Teymur, Betul, Zhou, Yihao, Ngaboyamahina, Edgard, and Mitzi, David B. Porous Cu2BaSn(S,Se)4 Film as a Photocathode Using Non-Toxic Solvent and a Ball-Milling Approach.  United States: N. p., 2021. 
Web.  doi:10.1021/acsaem.0c01892.

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                    Song, Jiwoo, Teymur, Betul, Zhou, Yihao, Ngaboyamahina, Edgard, & Mitzi, David B. Porous Cu2BaSn(S,Se)4 Film as a Photocathode Using Non-Toxic Solvent and a Ball-Milling Approach.  United States.  https://doi.org/10.1021/acsaem.0c01892

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                    Song, Jiwoo, Teymur, Betul, Zhou, Yihao, Ngaboyamahina, Edgard, and Mitzi, David B. Thu .  
"Porous Cu2BaSn(S,Se)4 Film as a Photocathode Using Non-Toxic Solvent and a Ball-Milling Approach".  United States.  https://doi.org/10.1021/acsaem.0c01892.  https://www.osti.gov/servlets/purl/1783205.

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@article{osti_1783205,

  title        = {Porous Cu2BaSn(S,Se)4 Film as a Photocathode Using Non-Toxic Solvent and a Ball-Milling Approach},

  author       = {Song, Jiwoo and Teymur, Betul and Zhou, Yihao and Ngaboyamahina, Edgard and Mitzi, David B.},

  abstractNote = {Cu2BaSn(S,Se)4 (CBTSSe) has been proposed as an alternative to Cu2ZnSn(S,Se)4 (CZTSSe) for solar absorbers due to its reduced propensity for antisite disorder and band tailing, while maintaining the desirable characteristics of band gap tunability, earth-abundance, and low toxicity constituent metals. However, current film deposition methods require high-vacuum conditions or toxic solvents, less desirable features for prospective large-scale production. Here, ball milling is demonstrated as a route towards a scalable processing method for CBTSSe, using a precursor ink consisting of common elements Cu2S, BaS, Sn, and S in low-toxicity ethanol. A final film with a thickness and average grain size on the order of 1 µm was synthesized with a band gap of 1.56 eV, corresponding to a Cu2BaSnS4-xSex (x ≈ 3) stoichiometry. A porous CBTSSe photocathode with Pt/TiO2/CdS overlayers was fabricated to demonstrate the photocurrent-generating capabilities of the film, yielding current densities of as high as 5.54 mA/cm2 at 0 V versus a reversible hydrogen electrode (V/RHE) .},

  doi          = {10.1021/acsaem.0c01892},

  journal      = {ACS Applied Energy Materials},

  number       = 1,

  volume       = 4,

  place        = {United States},

  year         = {Thu Jan 07 00:00:00 EST 2021},

  month        = {Thu Jan 07 00:00:00 EST 2021}

}

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Abstract

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