共查询到18条相似文献,搜索用时 109 毫秒
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硫化时间对电沉积制备FeS2薄膜组织与结构的影响 总被引:2,自引:0,他引:2
利用电沉积及热硫化法制备了FeS2 多晶薄膜,研究了不同硫化时间对FeS2 薄膜形成过程的影响。结果表明采用Na2S2O3 和FeSO4 水溶液电沉积和150~ 200℃处理可以制备多孔Fe3O4 薄膜,再经400℃、80kPa硫化处理,Fe3O4 可转变成FeS2 多晶薄膜。随硫化时间延长到10h,FeS2 的晶格常数减小而晶粒粗化,再继续延长硫化时间,FeS2 的晶格常数增大而晶粒尺寸下降。可以用点缺陷浓度、相变应力及亚晶界运动等因素分析Fe3O4 向FeS2 转变过程中的微观组织参数变化规律。 相似文献
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利用X射线衍射方法分析了电沉积铜薄膜的内应力及其织构特征.结果表明,随薄膜厚度的增加,薄膜内应力增大.电沉积铜薄膜具有较强的(220)丝织构,随着铜薄膜内应力的增加,(220)丝织构增强,同时叠加有板织构的特征. 相似文献
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FeS2薄膜是极具研究价值的光电转换材料,改善光电转换效率是主要研究方向,而进一步阐明电传导规律和机制是探索改善FeS2薄膜光电转换效率有效途径的前提之一。本文概述了FeS2薄膜电学性能的研究进展,分析了硫化制备工艺及掺杂效应对FeS2薄膜电学性能的影响,介绍了晶界势垒模型、跳跃传导模型及晶体点缺陷理论等FeS2薄膜电传导相关机制,讨论了FeS2薄膜存在的问题及发展方向。 相似文献
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离子束辅助沉积制备TaN薄膜的X射线衍射分析 总被引:4,自引:0,他引:4
利用离子束辅助沉积技术制备TaN薄膜,并对其进行X射线衍射分析,掠入射的X射线衍射分析得出:离子束辅助沉积制备的TaN薄膜胆面心立方结构,晶格常数α为0.4405nm。根据X射线衍射分析,用屈服强度表征有TaN薄膜的显微硬度为16-20GPa,与文献上报道的显微硬度值接近。 相似文献
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纳米FeS比表面积大且还原性强,对Cr(Ⅵ)吸附性能优异,但不稳定、易团聚,为解决这一问题,本文以油菜花粉为生物模板,通过共沉淀-焙烧法制得仿生FeS复合材料(bioFeS)。通过SEM、XRD及XPS等方法对bioFeS复合材料的表面微观形态和结构进行了表征。以Cr(Ⅵ)为目标污染物,分别考察了吸附剂用量、反应时间、反应温度、初始Cr(Ⅵ)浓度和pH对bioFeS复合材料吸附Cr(Ⅵ)性能的影响,探究了反应机制。结果表明:油菜花粉生物模板成功分散了FeS,制得的bioFeS复合材料比表面积大,在反应时间为120 min、pH值为1、吸附剂投加量为0.2 g·L-1、反应温度为25℃的条件下,bioFeS复合材料对Cr(Ⅵ)的吸附量可达88.95 mg·g-1;该吸附过程符合准二级动力学和Langmuir等温吸附模型;共存离子NO3-和SO42-会抑制Cr(Ⅵ)的去除。结合吸附动力学、热力学及XPS表面元素分析可知bioFeS复合材料除铬机制主要是吸附及化... 相似文献
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利用离子束辅助沉积技术制备TaN薄膜,并对其进行X射线衍射分析。掠入射的X射线衍射分析得出:离子束辅助沉积制备的TaN薄膜是面心立方结构,晶格常数a为0.4405nm。根据X射线衍射分析,用屈服强度表征的TaN薄膜的显微硬度为16~20GPa,与文献上报道的显微硬度值接近。离子束辅助沉积制备的TaN薄膜宏观内应力较小,且都为压应力。晶粒尺寸大约在10nm左右,随着注入离子能量的增加,薄膜晶粒尺寸有长大的趋势。 相似文献
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《Materials Letters》2005,59(19-20):2398-2402
The electrodeposition of iron disulfide pyrite (FeS2) thin films on indium–tin oxide (ITO) substrate in aqueous solution containing Na2S2O3·5H2O, FeCl2·4H2O reagents was investigated. The deposited material is successively annealed in sulfur atmosphere. In this way, we successfully obtained pyrite thin films with good quality. The structure, optical and electrical property analysis for the resulted films was carried out and some special results have been concluded. 相似文献
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The optical absorption in electron-beam-evaporated AgInTe2 thin films was studied in the energy range 0.5–2 eV. AgInTe2 was found to be a direct gap semiconductor with a room temperature gap of 1.03±0.01 eV. Another direct transition observed at 1.04±0.01 eV was ascribed to an optical transition from the crystal-field-split valence band to the conduction band minimum. A third direct allowed transition from the spin-orbit-split valence band to the conduction band was identified at 1.77±0.03 eV. An estimate of the p-d hybridization of the uppermost valence bands yields a value of about 15%. 相似文献
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H. Neumann W. Hörig V. Savelev J. Lagzdonis B. Schumann G. Kühn 《Thin solid films》1981,79(2):167-171
The optical absorption in flash-evaporated CuInS2 thin films was studied in the photon energy range from 0.5 to about 4.2 eV. CuInS2 was found to be a direct gap semiconductor with a gap energy of 1.524±0.005 eV at room temperature. The ground state energy of the free exciton was found to be about 8 meV. An indirect allowed transition was observed at 1.565±0.005 eV and was ascribed to an optical transition from the valence band maxima at the boundary of the Brillouin zone to the lowest conduction band minimum at the zone centre. Three further optical transitions which were probably due to the copper d states in the valence band were found at energies well above the fundamental edge. 相似文献
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Fangyang LiuJia Yang Jiaolian ZhouYanqing Lai Ming JiaJie Li Yexiang Liu 《Thin solid films》2012,520(7):2781-2784
CuGaSe2 thin films have been prepared by one-step electrodeposition and rapid thermal annealing process. According to composition and morphology analysis, deposition potential of − 0.6 V vs. SCE is considered to be optimum for electrodeposition. From the X-ray diffraction and Raman studies, the as-deposited film exhibits poor crystallinity without the evidence of CuGaSe2 or other Ga-containing phases, while the rapid thermal annealing-treated film shows chalcopyrite structure CuGaSe2 phase containing MoSe2 phase between the Mo substrate and the absorber and minor second phase Cu2 − xSe. The obtained CuGaSe2 thin film has a band gap of about 1.68 eV and p-type conductivity. 相似文献
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CoSnS2薄膜的制备及性能研究 总被引:1,自引:0,他引:1
采用两种方法制备了CoSnS2薄膜。在两步电沉积法中,先沉积SnS薄膜,再在其上制备CoS沉积薄膜,最后进行退火处理形成厚度约为1250nm的CoSnS2薄膜。在三元共沉积法中,加入EDTA(乙二胺四乙酸二钠)配合剂来调整Sn、Co、S的沉积电势以实现这三种元素的共沉积,从而一步形成厚约620nm的CoSnS2薄膜。探讨了薄膜的制备机理和制备条件对薄膜结构特性和光学特性的影响。得到的薄膜为多晶γ-Co6S2(立方晶系)和SnS(斜方晶系)结构,其直接光学带隙和间接光学带隙分别在1.05~1.25eV和0.11~0.71eV之间可调。 相似文献