研究目的
Investigating the germanium substitution effect on the property and performance of Cu2ZnSnSe4 thin films and its solar cell having absorber layer made by sputtering with single metallic target plus selenization.
研究成果
The Ge substitution improved the grain growth and densification of CZTSe, increased the optical band gap, shifted XRD peak to higher angle, and lowered the Sn content. The solar cell demonstrated enhancements in their device efficiencies with the highest efficiency of 7.23% achieved by incorporating a NaF layer.
研究不足
The study did not utilize MgF2 reflection coating, KCN etching solution, or strong acids like sulfuric acid for the absorbers, which might limit the comparison with other studies that used these treatments.
1：Experimental Design and Method Selection:
The study involved synthesizing Cu2Zn(Sn1-xGex)Se films with varying Ge content through sputtering with a single metallic target followed by selenization. The structural, electrical, and optical properties were measured to study defect chemistry.
2：Sample Selection and Data Sources:
Films were prepared with [Ge]/([Ge] + [Sn]) percentages of 0%, 5%, 10%, 15%, and 20%. The composition and growth morphology were characterized using FE-SEM and EDS.
3：0%. The composition and growth morphology were characterized using FE-SEM and EDS.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment included FE-SEM (JSM 6500F, JEOL, Japan), XRD (Bruker D2), Raman spectroscopy, XPS (VG ESCA), UV–vis spectrometer (V-670, Jasco), and Hall measurement system (HMS 2000 ECOPIA, Korea). Materials included Cu, Zn, Sn, and Ge powders for target preparation.
4：Experimental Procedures and Operational Workflow:
Metallic targets were prepared by mixing powders, hot pressed, and sputtered onto Mo/glass substrates. Films were selenized, and CdS buffer layers were deposited via chemical-bath deposition. ZnO and ITO layers were sputtered, and silver paste was used for electrode contact.
5：Data Analysis Methods:
Structural properties were analyzed via XRD and Raman spectroscopy. Electrical properties were measured using the van der Pauw method. Optical properties were assessed through UV–vis spectroscopy.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
