Abstract The un- and manganese (Mn)-doped Cu3Se2 nanosheets were prepared by the electrodeposition method. X-ray diffraction (XRD) patterns revealed that polycrystalline Cu3Se2 nanostructures were at the tetragonal phase. Field emission scanning electron microscopy (FESEM) images showed that all samples had a sheet-like structure. The photoluminescence (PL) spectra showed that the un- and Mn-doped Cu3Se2 nanosheets had three emission bands in violet, green, and red regions. The absorption spectra also demonstrated that the band gap energy of the Mn-doped samples was increased relative to the un-doped sample. Solar cell evaluation showed that addition of Mn dopant was effective on increasing the solar cell efficiency. Further investigations indicated that these changes were close to different physical properties such as increase in the surface-to-volume ratio, absorption intensity, and carrier concentration with the lowest value of strain.

中文翻译：

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Mn掺杂的Cu3Se2纳米片：物理特性对光伏性能的影响

摘要 采用电沉积法制备了未掺杂和锰(Mn)掺杂的Cu3Se2纳米片。X 射线衍射 (XRD) 图案显示多晶 Cu3Se2 纳米结构处于四方相。场发射扫描电子显微镜 (FESEM) 图像显示所有样品均具有片状结构。光致发光 (PL) 光谱表明未掺杂和掺杂 Mn 的 Cu3Se2 纳米片在紫色、绿色和红色区域具有三个发射带。吸收光谱还表明，Mn 掺杂样品的带隙能量相对于未掺杂样品增加。太阳能电池评估表明，添加Mn掺杂剂可有效提高太阳能电池效率。