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HomeMaterials Science ForumMaterials Science Forum Vol. 1016Non-Vacuum Fabrication of Bandgap-Controlled CZTGS...

Non-Vacuum Fabrication of Bandgap-Controlled CZTGS Alloy Films Using CZTS+CZGS Mixed Nanoparticle Inks

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Abstract:

Semiconductor alloy films of Cu₂ZnSn_1-xGe_xS₄ (CZTGS) were prepared by deposition and sintering of mixed nanoparticle suspensions composed of Cu₂ZnSnS₄ (CZTS) and Cu₂ZnGeS₄ (CZGS) nanoparticles with 1-dodecanethiol surfactant. Colloidal CZTS and CZGS nanoparticles were synthesized via the liquid-phase route and used without post-processing treatment. The CZTGS films are crystallized in the form of kesterite structures and form an alloy of CZTS and CZGS without an apparent phase separation. The Sn/Ge ratios in the alloy films were finely controlled by tuning a mixing ratio between CZTS and CZGS nanoparticles. The bandgap energy of the CZTGS film systematically increased from 1.6 to 2.1 eV as the Ge-substitution for Sn in the films proceeded, which indicates the potential of the fabrication method in the manufacture of bandgap-tuned multinary semiconductor thin films.

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THERMEC 2021

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Periodical:

Materials Science Forum (Volume 1016)

Pages:

509-515

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.1016.509

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Online since:

January 2021

Authors:

Yasushi Hamanaka*, Kojiro Matsumoto

Keywords:

Bandgap Tuning, CZTS, Nanoparticle Ink, Photovoltaic Material, Semiconductor Alloy

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© 2021 Trans Tech Publications Ltd. All Rights Reserved

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