排序方式: 共有23条查询结果,搜索用时 8 毫秒
11.
12.
Highly crystalline and transparent cadmium sulphide(CdS) films were deposited on glass substrate by electron beam evaporation technique.The structural and optical properties of the films were investigated.The X-ray diffraction analysis revealed that the CdS films have a hexagonal structure and exhibit preferred orientation along the(002) plane.Meanwhile,the crystalline quality of samples increased first and then decreased as the substrate temperature improved,which is attributed to the variation in film thickness.UV-vis spectra of CdS films indicate that the absorption edge becomes steeper and the band gap present fluctuation changes in the range of 2.389-2.448 eV as the substrate temperature increased.The photoluminescence peak of the CdS films was found to be broadened seriously and there only emerges a red emission band at 1.60 eV.The above results were analyzed and discussed. 相似文献
13.
14.
15.
16.
17.
18.
采用电子束蒸发法制备了PbI2多晶薄膜,研究制备条件对薄膜光电性质的影响。结果表明,不同条件下制备的样品呈现不同的择优取向生长特征,但均属于六方相多晶结构。随着衬底温度的升高,PbI2薄膜的紫外-可见透过谱透过性能提高,光学带隙由室温时的2.33 eV增大到200℃时的2.44 eV。同时发现,不同源-衬间距制备样品的光谱透过性能和光学带隙基本相同。光致发光谱(PL)测试表明,薄膜的发光可能源自禁带中的缺陷能级跃迁,其PL发光峰的强度和展宽随源-衬间距的增大有明显变化。论文最后测试了PbI2薄膜在绿光LED照射下的光电导响应,发现制备样品的光电导响应性能与薄膜的沉积温度和源-衬间距有密切关系,光电导率的数量级约在10-8~10-9Ω-1.cm-1之间。 相似文献
19.
电子束蒸发制备CdS多晶薄膜及性质研究 总被引:1,自引:0,他引:1
采用电子束蒸发工艺在普通玻璃衬底上制备了硫化镉(CdS)多晶薄膜,研究了不同衬底温度对薄膜结构、表面形貌及光透过率的影响.测试结果显示:(1)不同衬底温度下沉积的CdS薄膜均呈现了〈002〉晶向的高度优势生长,属于六方相结构.随着衬底温度的升高,还逐渐出现了〈103〉、〈004〉、〈105〉等六方晶向;(2)CdS多晶薄膜表面连续,致密性好,且晶粒大小随着衬底温度的升高而增大;(3)低温下制备CdS薄膜吸收谱有较宽的吸收边,随着衬底温度的升高,吸收曲线趋于陡直.制备样品在550nm波段后的平均透过率都超过70%,符合作为CdTe太阳电池的窗口层. 相似文献
20.
采用电子束蒸发法在玻璃衬底上制备MoO3薄膜.X射线衍射谱表明制备样品属于正交晶系,沿<010>晶向择优取向生长.随着衬底温度的升高,样品的晶粒尺寸先增大后减小,退火后又增大.此外,样品的(040)衍射峰随衬底温度升高单调向低衍射角方向移动.扫描电镜照片显示制备样品具有针状晶粒特征,退火后晶粒大小的分布趋于均匀.紫外-... 相似文献