Earth-abundant and visible light sensitive Cu₂FeSnS₄ layer is decorated on Ni-TiO₂ nanorods (CFTS/Ni-TiO₂ NRs) using wet chemical approach. First, Ni doping is performed on hydrothermally grown TiO₂ nanorods to achieve Ni on the surface of TiO₂. After surface doping of Ni, the bandgap of TiO₂ nanorod films changes from 3.0 eV to 2.79 eV. Once the layer of Cu₂FeSnS₄ is decorated on the Ni doped TiO₂ nanorods the absorption edge of the photoanode further shifted toward lower energy. Mott-Schottky analysis revealed more than 3-fold increase in photogenerated charge carrier density in CFTS/Ni-TiO₂ NRs. This heterostructured photoanodes demonstrated a significant increase in photocurrent from 0.730 mA/cm² to 2.09 mA/cm² (at 1.23 V vs RHE). The lifetime of photo-generated charge carriers also improves from 10.87 s to 15.36 s for CFTS/Ni-TiO₂ NRs as compared to TiO₂ NRs. The CFTS/Ni-TiO₂ NRs exhibit excellent photoelectrochemical properties with high stability, hence this heterostructure can be a potential candidate for solar energy device applications.

使用湿化学方法在Ni-TiO ₂纳米棒（CFTS / Ni-TiO ₂ NRs）上装饰对地球敏感的可见光的Cu ₂ FeSnS ₄层。首先，镍掺杂于水热生长的TiO进行₂纳米棒来实现的Ni TiO 2的表面上的₂。Ni的表面掺杂后，TiO ₂纳米棒薄膜的带隙从3.0 eV变为2.79 eV。一旦在Ni掺杂的TiO ₂上装饰了Cu ₂ FeSnS ₄层纳米棒进一步将光阳极的吸收边缘移向较低的能量。Mott-Schottky分析显示CFTS / Ni-TiO ₂ NRs中光生载流子密度增加了3倍以上。这种异质结构的光阳极显示出光电流从0.730 mA / cm ²显着增加到2.09 mA / cm ²（在相对于RHE的1.23 V下）。光生载流子的寿命也从10.87小号提高到15.36 S代表CFTS /镍的TiO _2个卢比相比的TiO ₂卢比。CFTS / Ni-TiO ₂ NRs具有出色的光电化学性能和高稳定性，因此这种异质结构可以成为太阳能设备应用的潜在候选者。