Morphology controllable Cu₂ZnSnSe₄ (CZTSe) nanoparticles (NPs) were successfully synthesized through hot injection method using oleic acid as solvent. The crystalline phase of the as-synthesized CZTSe NPs was confirmed with powder X-ray diffraction (XRD) and Raman results. The optical absorption spectra of CZTSe NPs exhibit a band gap of 1.21 eV. SEM analysis showed interconnected nanoflake-like morphology with higher surface area. The solid-state ligand exchanged CZTSe thin film without any toxic selenization process was used as counter electrode (CE) in dye-sensitized solar cells (DSSCs). The electrocatalytic activity of the CZTSe thin film for the reduction of iodide (I₃⁻/I⁻) electrolyte was studied through cyclic voltammetry (CV) measurements. The DSSCs with ligand exchanged CZTSe CE exhibit an efficiency of 3.9% under 1 sun illumination, which is found to be higher than the Pt-based DSSC (3.5%) prepared in the same lab.

以油酸为溶剂，通过热注射法成功地合成了形貌可控的Cu ₂ ZnSnSe ₄（CZTSe）纳米粒子。合成的CZTSe NP的结晶相通过粉末X射线衍射（XRD）和拉曼光谱得到证实。CZTSe NP的光吸收光谱显示带隙为1.21 eV。扫描电镜分析表明相互连接的纳米片状形态具有较高的表面积。没有任何有毒硒化过程的固态配体交换CZTSe薄膜被用作染料敏化太阳能电池（DSSC）中的对电极（CE）。所述CZTSe薄膜的碘化物（I还原的电催化活性₃ ^- / I ^-通过循环伏安法（CV）测量研究了电解液。具有配体交换的CZTSe CE的DSSC在1个阳光照射下显示出3.9％的效率，该效率高于在同一实验室中制备的基于Pt的DSSC（3.5％）。