Tuning electronic and photocatalytic properties in pulsed light synthesis of Cu2ZnSnS4 films from CuS-ZnS-SnS nanoparticles

Hyun Jun Hwang, Cheng Zeng, Changqing Pan, Michael Dexter, Rajiv Malhotra, Chih hung Chang

Research output: Contribution to journalArticle

Abstract

We investigate rapid in-situ synthesis of Cu2ZnSnS4 (CZTS) thin films via Intense Pulsed Light (IPL) irradiation of solution-deposited and mixed binary CuS, ZnS, SnS nanoparticles (NPs) in ambient conditions. The film phase, composition, morphology, electrical properties, optical properties and photocatalytic activity are characterized as a function of the optical fluence. Crystalline pure-phase kesterite CZTS films with high p-type conductivity of 51 S/cm and optical band gap 1.42 eV are synthesized within 15 s. Surprisingly, using supra-optimal IPL fluence (in 19 s) yields films with a composite CZTS-SnO2/SnS2 composition that exhibits about 20% higher photocatalytic efficiency and higher carrier mobility (≈ 120 cm2/Vs) than pure-phase kesterite films. The reaction pathways during IPL irradiation and the resulting film composition are used to understand the enhanced photocatalysis for the supra-optimal fluence. This work will create new avenues for scalable IPL-based bottom-up synthesis of new multinary chalcogenide composites from their binary NPs.

Original languageEnglish (US)
Article number110645
JournalMaterials Research Bulletin
Volume122
DOIs
StatePublished - Feb 2020

Fingerprint

Semiconducting films
semiconducting films
Zinc sulfide
zinc sulfides
Composite films
Photocatalysts
Energy gap
Optical properties
Tuning
tuning
Irradiation
Nanoparticles
optical properties
Thin films
nanoparticles
irradiation
synthesis
thin films
fluence
electronics

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Keywords

  • Binary nanoparticles
  • CuZnSnS
  • Intense pulsed light synthesis
  • Photocatalyst

Cite this

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title = "Tuning electronic and photocatalytic properties in pulsed light synthesis of Cu2ZnSnS4 films from CuS-ZnS-SnS nanoparticles",
abstract = "We investigate rapid in-situ synthesis of Cu2ZnSnS4 (CZTS) thin films via Intense Pulsed Light (IPL) irradiation of solution-deposited and mixed binary CuS, ZnS, SnS nanoparticles (NPs) in ambient conditions. The film phase, composition, morphology, electrical properties, optical properties and photocatalytic activity are characterized as a function of the optical fluence. Crystalline pure-phase kesterite CZTS films with high p-type conductivity of 51 S/cm and optical band gap 1.42 eV are synthesized within 15 s. Surprisingly, using supra-optimal IPL fluence (in 19 s) yields films with a composite CZTS-SnO2/SnS2 composition that exhibits about 20{\%} higher photocatalytic efficiency and higher carrier mobility (≈ 120 cm2/Vs) than pure-phase kesterite films. The reaction pathways during IPL irradiation and the resulting film composition are used to understand the enhanced photocatalysis for the supra-optimal fluence. This work will create new avenues for scalable IPL-based bottom-up synthesis of new multinary chalcogenide composites from their binary NPs.",
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Tuning electronic and photocatalytic properties in pulsed light synthesis of Cu2ZnSnS4 films from CuS-ZnS-SnS nanoparticles. / Hwang, Hyun Jun; Zeng, Cheng; Pan, Changqing; Dexter, Michael; Malhotra, Rajiv; Chang, Chih hung.

In: Materials Research Bulletin, Vol. 122, 110645, 02.2020.

Research output: Contribution to journalArticle

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T1 - Tuning electronic and photocatalytic properties in pulsed light synthesis of Cu2ZnSnS4 films from CuS-ZnS-SnS nanoparticles

AU - Hwang, Hyun Jun

AU - Zeng, Cheng

AU - Pan, Changqing

AU - Dexter, Michael

AU - Malhotra, Rajiv

AU - Chang, Chih hung

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