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<p>Nanorods (NRs) have gained prominence in technological development based on the surface area and composition due to tunable physical and chemical properties. In this paper, the kesterite phase of CZTS nanorods has been synthesized for photo-electrochemical application. CZTS is low cost, earth abundant, environmental friendly, and non-toxic material. X-ray diffraction (XRD) pattern and Raman spectra confirm the presence of stable Kesterite phase without any secondary/ternary phases.&#xa0;Field emission scanning electron microscopy (FESEM) revealed that the CZTS nanorods were 138–200 nm long and 27–50 nm in diameter. Energy-dispersive spectroscopy (EDS) showed their elemental ratio to be Cu:Zn:Sn:S = 1.80 : 0.90 : 0.85 : 3.65. Photocurrent density of 1.01&#xa0;mA/cm<sup>2</sup> at 0&#xa0;V vs. RHE (Reversible hydrogen electrode) under light illumination was observed when used as photoelectrode in PEC cell. The prepared photoelectrode provides acceptor carrier concentration around N<sub>a</sub> = 7.48 X10<sup>20</sup> cm<sup>−3</sup> with flat band potential 0.74&#xa0;V from Mott–Schottky response and overall superior electrochemical catalytic ability from impedance analysis. The prepared NRs are quantitatively more efficient for PEC applications than previously reported nanostructures of CZTS.</p>

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Single-phase CZTS nanorods for photoelectrochemical application

  • 期刊论文

  • 发表日期：

    2025年12月17日

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  • Navnita Kumari,
  • Nishant Saini,
  • Sandip Paul Choudhury

摘要

Nanorods (NRs) have gained prominence in technological development based on the surface area and composition due to tunable physical and chemical properties. In this paper, the kesterite phase of CZTS nanorods has been synthesized for photo-electrochemical application. CZTS is low cost, earth abundant, environmental friendly, and non-toxic material. X-ray diffraction (XRD) pattern and Raman spectra confirm the presence of stable Kesterite phase without any secondary/ternary phases. Field emission scanning electron microscopy (FESEM) revealed that the CZTS nanorods were 138–200 nm long and 27–50 nm in diameter. Energy-dispersive spectroscopy (EDS) showed their elemental ratio to be Cu:Zn:Sn:S = 1.80 : 0.90 : 0.85 : 3.65. Photocurrent density of 1.01 mA/cm2 at 0 V vs. RHE (Reversible hydrogen electrode) under light illumination was observed when used as photoelectrode in PEC cell. The prepared photoelectrode provides acceptor carrier concentration around Na = 7.48 X1020 cm−3 with flat band potential 0.74 V from Mott–Schottky response and overall superior electrochemical catalytic ability from impedance analysis. The prepared NRs are quantitatively more efficient for PEC applications than previously reported nanostructures of CZTS.