Electrochemical synthesis of nanostructured Se-doped SnS: Effect of Se-dopant on surface characterizations
Electrochemical synthesis of nanostructured Se-doped SnS: Effect of Se-dopant on surface characterizations
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DOI：
10.1016/j.apsusc.2017.03.062
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发表时间：
2017-07-15
影响因子：
6.7
通讯作者：
Balak, Zohre
中科院分区：
文献类型：
--
作者：
Kafashan, Hosein;Azizieh, Mandi;Balak, Zohre
采用阴极电沉积技术在氟掺杂氧化锡（FTO）衬底上沉积了不同硒掺杂浓度的SnS1-xSex纳米结构。pH、温度、外加电位(E)和沉积时间分别为2.1、60℃、-1V和30 min。采用x射线衍射（XRD）、场发射扫描电镜（FESEM）、能量色散x射线能谱（EDX）、室温光致发光（PL）和紫外-可见光谱对SnS1-xSex纳米结构进行了表征。XRD分析表明，SnS1-xSex纳米结构为多晶正交结构。由于硒的掺杂，FESEM显示SnS1-xSex纳米结构具有多种形态。利用PL和UV-vis光谱对SnS1-xSex薄膜的光学性能进行了评价。SnS1-xSex纳米结构的PL光谱显示出蓝色、绿色、橙色和红色四个发射峰。紫外可见光谱显示，由于硒掺杂，SnS1-xSex纳米结构的光学带隙能（E-g）在1.22 ~ 1.65 eV之间变化。(C) 2017 Elsevier B.V.版权所有
SnS1-xSex nanostructures with different Se-dopant concentrations were deposited on fluorine doped tin oxide (FTO) substrate through cathodic electrodeposition technique. The pH, temperature, applied potential (E), and deposition time remained were 2.1, 60 degrees C, -1V, and 30 min, respectively. SnS1-xSex nanostructures were characterized using X-ray diffraction (XRD), field emission scanning electron microcopy (FESEM), energy dispersive X-ray spectroscopy (EDX), room temperature photoluminescence (PL), and UV-vis spectroscopy. The XRD patterns revealed that the SnS1-xSex nanostructures were polycrystalline with orthorhombic structure. FESEM showed various kinds of morphologies in SnS1-xSex nanostructures due to Se-doping. PL and UV-vis spectroscopy were used to evaluate the optical properties of SnS1-xSex thin films. The PL spectra of SnS1-xSex nanostructures displayed four emission peaks, those are a blue, a green, an orange, and a red emission. UV-vis spectra showed that the optical band gap energy (E-g) of SnS1-xSex nanostructures varied between 1.22-1.65 eV, due to Se-doping. (C) 2017 Elsevier B.V. All rights reserved.