空气中旋涂热解快速制备高化学计量比SnS_2薄膜  

High Stoichiometric-ratio SnS_2 Thin Films Rapid Prepared by Spin Coating-pyrolysis Method in Air

作　　者：张正国[1] 王凯[1] 吴珊珊 孙治安 龚波林[1] 

机构地区：[1]北方民族大学化学与化学工程学院,银川750021

出　　处：《人工晶体学报》2017年第9期1846-1850,1857,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(21565001);国家民委化工重点实验室科研项目(2016HG02);北方民族大学科研项目(2016HG-KY05;2016HG-KY01;2015KJ30)

摘　　要：为快速制备高化学计量比的SnS_2薄膜,介绍了一种简单的旋涂热解法,以Sn Cl4·5H2O和硫脲分别为Sn源和S源,在空气中及热解温度分别为200℃、260℃和320℃时制备了系列SnS_2薄膜,这是首次使用旋涂热解法制备SnS_2薄膜的尝试。采用EDS、XRD、Raman、SEM、UV-Vis等手段研究了热解温度对SnS_2薄膜元素组成、晶相、形貌、光学吸收等的影响,在热解温度为260℃且仅需热解2 min条件下,获得了Sn/S原子比为1/1.98的高化学计量比SnS_2薄膜,该薄膜直接禁带宽度为2.50 e V,非常适合作为太阳能电池窗口层。To prepare high stoichiometric-ratio SnS2 thin films rapidly,a facial spin coating-pyrolysis method was introduced and a serials SnS2 thin films were prepared at 200 ℃,260 ℃ and 320 ℃ in air using SnCl4·5H2O and thiourea. To the best of our knowledge,the spin coating-pyrolysis method was the first time using to prepare SnS2 thin films. Energy spectrum analysis（ EDS）,X-ray diffraction（ XRD）,Raman scattering analysis,scanning electron microscopy（ SEM） and ultraviolet-visible spectro photometer（ UV-Vis） were used to investigate the elementary compositions, crystalline phases,morphology and optical absorption of SnS2 thin films. The SnS2 thin film with the high Sn/S stoichiometric-ratio of 1/1. 98 and a direct corresponding ban gap of 2. 50 e V was prepared at 260 ℃ just for 2 min,which was very suitable for the window layer in thin film solar cells.

关 键 词：SnS2薄膜 旋涂热解 化学计量比 拉曼光谱 光学吸收 

分 类 号：TN304[电子电信—物理电子学] O484[理学—固体物理]