Microwave-assisted rapid synthesis of tetragonal Cu2SnS3 nanoparticles for solar photovoltaics

Devendra Tiwari, Tapas K. Chaudhuri, T. Shripathi, U. Deshpande, V. G. Sathe

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

A simple and rapid process for the synthesis of Cu2SnS3 (CTS) nanoparticles by microwave heating of metal–organic precursor solution is described. X-ray diffraction and Raman spectroscopy confirm the formation of tetragonal CTS. X-ray photoelectron spectroscopy indicates the presence of Cu, Sn, S in +1, +4, −2 oxidation states, respectively. Transmission electron microscopy divulges the formation of crystalline tetragonal CTS nanoparticles with sizes ranging 2–25 nm. Diffuse reflectance spectroscopy in the 300–2,400 nm wavelength range suggests a band gap of 1.1 eV. Pellets of CTS nanoparticles show p-type conduction and the carrier transport in temperature range of 250–425 K is thermally activated with activation energy of 0.16 eV. Thin film solar cell (TFSC) with architecture: graphite/Cu2SnS3/ZnO/ITO/SLG is fabricated by drop-casting dispersion of CTS nanoparticles which delivered a power conversion efficiency of 0.135 % with open circuit voltage, short circuit current and fill factor of 220 mV, 1.54 mA cm−2, 0.40, respectively.
Original languageEnglish
Pages (from-to)1139-1146
JournalApplied Physics
Volume117
Issue number3
Early online date26 May 2014
DOIs
Publication statusPublished - 1 Nov 2014
Externally publishedYes

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