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Kesterite Cu2ZnSnS4 thin films synthesized utilizing electrodeposition: Influence of metal doping on the properties
International Journal of Energy Research ( IF 4.6 ) Pub Date : 2020-09-21 , DOI: 10.1002/er.5873
Elmoiz M. Mkawi 1, 2
Affiliation  

In the present study, kesterite films were synthesized by sulfurization of co‐electrodeposited Cu2ZnSnS4 (CZTS) precursor, focusing on the effect of different metals (Li, Na, Sb, and Cr) on the CZTS thin films' properties. The structural, morphological, electrical and optical properties of the films were investigated. We demonstrated the deposition of four different metals using spin‐coating on co‐electrodeposited thin films. X‐ray diffraction (XRD) confirmed the kieserite phase with major intense peaks corresponding to the (112), (200), (312) and (332) planes with improvement in crystallinity after doping. Raman spectroscopy indicated the presence of a pure kesterite phase with a minor amount of impurities in the Na‐doped CZTS thin film. FE‐SEM analyses showed smooth, compact, and uniform surface morphology with fewer holes and cracks and well‐defined boundaries between the submicron particles and adherent layer cross section. An energy gap absorption edge ranging from 1.56 eV to 1.71 eV was calculated from the absorption measurements, while improvements in the energy gab were observed depending on the doping metal. The absorption coefficient was higher than 104 cm−1 in the visible spectrum of light. The performance of the solar cell with a device configuration of Glass/Mo/CZTS/CdS/i‐ZnO/ZnO: Al/Ag under simulated AM 1.5 was reported. The presence of different dopants increased the average efficiency from 1.74% ± 0.4 to 3.47% ± 0.3. Upon Na doping, solar cell device demonstrated as high‐performance efficiency as 3.47%, featuring opencircuit voltage Voc = 343 mV, short‐circuit current density Jsc =12.55 mA/cm2, and a fill factor FF = 69.1.

中文翻译:

电沉积合成的Kesterite Cu2ZnSnS4薄膜:金属掺杂对性能的影响

在本研究中,通过共电沉积的Cu 2 ZnSnS 4的硫化来合成镁橄榄石膜(CZTS)前体,重点研究不同金属(Li,Na,Sb和Cr)对CZTS薄膜性能的影响。研究了薄膜的结构,形态,电学和光学性质。我们通过在共电沉积的薄膜上进行旋涂演示了四种不同金属的沉积。X射线衍射(XRD)证实了硅藻土相具有主要的强峰,对应于(112),(200),(312)和(332)平面,掺杂后结晶度得到改善。拉曼光谱表明,在掺Na的CZTS薄膜中存在纯的钾长石相,其中含有少量杂质。FE‐SEM分析显示,表面形态光滑,致密且均匀,孔和裂纹更少,亚微米颗粒与粘附层横截面之间的边界清楚。从吸收测量值计算出1.56 eV至1.71 eV的能隙吸收边,同时根据掺杂金属观察到了能隙的改善。吸收系数大于10在可见光谱中为4 cm -1。报告了在模拟AM 1.5下具有Glass / Mo / CZTS / CdS / i-ZnO / ZnO:Al / Ag器件配置的太阳能电池的性能。不同掺杂剂的存在将平均效率从1.74%±0.4提高到3.47%±0.3。一旦钠掺杂,证明是高性能的效率为3.47%的太阳能电池装置,具有-电路电压的Voc = 343毫伏,短路电流密度Jsc =12.55毫安/厘米2,和填充因子FF = 69.1。
更新日期:2020-09-21
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