Kesterite CZTS nanocrystals: PH-dependent synthesis

Mahesh Suryawanshi, Seung Wook Shin, Woo Ri Bae, Kishor Gurav, Myun Gil Kang, Ganesh Agawane, Pramod Patil, Jae Ho Yun, Jeong Yong Lee, Annasaheb Moholkar, Jin Hyeok Kim

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18 Scopus citations


The kesterite Cu 2 ZnSnS 4 (CZTS) nanocrystals (NCs) were successfully synthesized using a relatively simple and one-step hydrothermal route. The structural, compositional, and optical properties of the kesterite CZTS NCs have been studied in detail. The pH-dependent CZTS phase formation has been elucidated for the first time. The X-ray diffraction and Raman spectroscopy confirmed the formation of a main phase kesterite CZTS structure only at pH 7. However, for pH values (4.3, 5, and 9), the formation of CZTS alongwith few secondary phases like Cu 2 SnS 3 (CTS), Cu 2-x S, and SnS 2 /Sn 2 S 3 have been detected. CZTS NCs of size 10-100nm were obtained at 200°C and pH 7. The synthesized NCs showed a pH-dependent variation in optical band gap values from 1.15 to 1.44eV, which is near optimum value for low cost thin film solar cells.

Original languageEnglish (US)
Pages (from-to)1531-1534
Number of pages4
JournalPhysica Status Solidi (A) Applications and Materials Science
Issue number7
StatePublished - Jul 2014


  • hydrothermal synthesis
  • solar cells
  • thin films


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