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Growth of the next generation promising Cu2 Fe1-xCoxSnS4 thin films and efficient p-CCTS/n-In2S3/n-SnO2F heterojunction for optoelectronic applications
Materials Research Bulletin ( IF 5.4 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.materresbull.2020.111028
Chayma Nefzi , Mehdi Souli , J.L. Costa-Krämer , Jorge M. García , Najoua Kamoun-Turki

Abstract In this paper, we have elaborated Cu2Fe1-x CoxSnS4 (CFCTS) thin films (x = 0%, 25%, 50%, 75% and 100%) by spray pyrolysis technique on glass substrates. The effect of varying (Fe/Co) ratio on chemical composition, morphological, structural, optical and electrical properties has been investigated using energy dispersive X-ray spectrometry (EDX), scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, spectrophotometer and Hall Effect measurements respectively. XRD results have shown that the change in (Fe/Co) ratio leads to the transformation of stannite CFTS (x = 0%) to stannite CCTS (x = 100%) with the same preferred orientation (112) plan. CFTS and CCTS phases have been confirmed by Raman peaks located respectively at 318 and 325 cm-1. A uniform and dense distribution of CCTS thin film were observed by scanning electron microscopy (SEM). Estimated band gap values of CFTS and CCTS thin films were equal to 1.46 eV and 1.32 eV respectively. Electrical resistivity value was decreased from 5.82 10-3 Ω.cm for CFTS thin film to 5 10-3 Ω.cm for CCTS thin film. These experimental results allow us to consider CFTS and CCTS as good candidates to be used as absorber materials in solar cell devices. Photocatalytic activities of CCTS thin film, CCTS/SnO2:F, CCTS/In2S3 and CCTS/In2S3/SnO2:F heterojunctions have been investigated under sun light irradiation using methylene blue (MB) as representative pollutant dye. It was found that the photodegradation rate was near to 86% in the presence of CCTS /In2S3 / SnO2:F heterojunction after 4 hours which leads to considering it as a good candidate to implement eco-friendly, sun-powered devices for removing organic pollution in waste water. for photocatalysis applications.

中文翻译:

用于光电应用的下一代有前途的 Cu2 Fe1-xCoxSnS4 薄膜和高效 p-CCTS/n-In2S3/n-SnO2F 异质结的生长

摘要 在本文中,我们通过喷雾热解技术在玻璃基板上制备了 Cu2Fe1-x CoxSnS4 (CFCTS) 薄膜(x = 0%、25%、50%、75% 和 100%)。使用能量色散 X 射线光谱 (EDX)、扫描电子显微镜 (SEM)、X 射线衍射 (XRD) 研究了不同 (Fe/Co) 比对化学成分、形态、结构、光学和电学性质的影响、拉曼光谱、分光光度计和霍尔效应测量分别。XRD 结果表明,(Fe/Co) 比的变化导致亚锡石 CFTS (x = 0%) 转变为具有相同优选取向 (112) 平面的亚锡石 CCTS (x = 100%)。CFTS 和 CCTS 相已通过分别位于 318 和 325 cm-1 的拉曼峰得到证实。通过扫描电子显微镜 (SEM) 观察到 CCTS 薄膜均匀且致密的分布。CFTS 和 CCTS 薄膜的估计带隙值分别等于 1.46 eV 和 1.32 eV。电阻率值从 CFTS 薄膜的 5.82 10-3 Ω.cm 降低到 CCTS 薄膜的 5 10-3 Ω.cm。这些实验结果使我们能够将 CFTS 和 CCTS 视为在太阳能电池器件中用作吸收材料的良好候选材料。CCTS 薄膜、CCTS/SnO2:F、CCTS/In2S3 和 CCTS/In2S3/SnO2:F 异质结的光催化活性在阳光照射下使用亚甲蓝 (MB) 作为代表性污染物染料进行了研究。发现在 CCTS /In2S3 / SnO2 存在下光降解率接近 86%:4 小时后 F 异质结,这导致将其视为实施环保、太阳能设备以去除废水中的有机污染的良好候选者。用于光催化应用。
更新日期:2021-01-01
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