稀土Eu^(3+)掺杂对SnO_(2)薄膜光学和电学性质的影响

基于旋涂法制备了Eu^(3+)掺杂的SnO_(2)薄膜,并通过紫外-可见分光光度计(UV-Vis)、电流-电压测试和原子力显微镜(AFM)等对样品的光学性质、电学性质和表面形貌进行了表征。研究发现,在200nm~380nm的波长范围内,掺杂15at%Eu^(3+)的SnO_(2)薄膜光吸收率最高;在380nm~700nm的可见光范围内,掺杂15at%Eu^(3+)的SnO_(2)薄膜光透射率较强,掺杂20at%Eu^(3+)的SnO_(2)薄膜光吸收率最强。随着Eu3+掺杂浓度的增加,SnO_(2)薄膜的电阻增加,表面的平均粗糙度显著降低。

掺杂SnO_2透明导电薄膜电学及光学性能研究

通过实验测量 ｓｏｌ－ｇｅｌ工艺制备的 Ｓｂ掺杂 ＳｎＯ２薄膜载流子浓度、迁移率、电阻率、膜厚，紫外－可见光区透射率、反射率等性质，详细研究了Ｓｂ掺杂ＳｎＯ２薄膜电学与光学性能．实验发现，薄膜具有良好的透光性和较高导电性，膜内载流子浓度高达１０２０ｃｍ－３，电阻率～１０－２Ω·ｃｍ，透光率高达 ９０％，ＳｎＯ２膜禁带宽度 Ｅｇ＝３７～３．８０ｅＶ．

SnO_2∶Sb∶Ni低温气敏薄膜的制备及性能研究

以无机盐SnCl4 ·5H2 O ,SbCl5,NiCl2 ·6H2 O为原料 ,采用溶胶 凝胶工艺制备了Sb2 O3 和NiO掺杂的SnO2 薄膜 .研究了SnO2 ∶Sb∶Ni薄膜的电学和气敏性能 .实验研究表明 ,由于锑的掺杂 ,所制得的SnO2 ∶Sb∶Ni薄膜电阻较低 ,室温下其电阻只有 1 2 0kΩ/□ .而NiO作为催化剂 ,使其对NOx 气体具有较高的灵敏度和良好的选择性 .与SnO2 ∶Sb薄膜相比 ,其工作温度大大降低 ,在常温下对NOx 气体 (主要成分是NO)也具有一定的灵敏度 ;并且水汽不影响其对NOx 气体的灵敏度 .SnO2 ∶Sb∶Ni薄膜工作温度的降低主要是薄膜表面缺陷和颈连粒子的存在所致 .

红外灯辅助喷雾热解法制备可控锑掺杂氧化锡透明热反射薄膜

本文以乙二醇为溶剂及配位剂,以冰乙酸为酸性催化剂,采用溶胶-凝胶法制备均一稳定的具有不同锑掺杂浓度的二氧化锡(Sn O_2)溶胶,再通过红外灯辅助喷雾热解法制备性能优异的可控锑掺杂Sn O_2薄膜,并对薄膜微结构、光电性能进行表征。结果表明:薄膜以四方金红石结构存在,结晶完全;方阻值随锑掺杂浓度和成膜厚度的增加而降低;薄膜在可见光区的平均透过率可达79%左右,且在中远红外光区的平均反射率可达80%左右。此外,通过改变锑掺杂浓度和成膜厚度,能够有效地调节薄膜的红外反射率与反射起点波长,从而满足不同气候条件对热反射和热发射的不同要求。

Photoelectrocatalytic activity of two antimony doped SnO_2 films for oxidation of phenol pollutants

Two types of Sb-doped SnO2 films on titanium substrate were prepared by the combination of electro-deposition and dip-coating (Ti/SnO2-Sb2O4/SnO2-Sb2O4) and single dip-coating (Ti/SnO2-Sb2O4), respectively. The surface morphology and crystalline structure of both film electrodes were characterized using X-ray diffractometry(XRD) and scanning electron microscopy(SEM). XRD spectra indicate that the rutile SnO2 forms in two films and a TiO2 crystallite exists only in Ti/SnO2-Sb2O4 electrode. SEM images show that the surface morphology of two films is typically cracked-mud structure. The photooxidation experiment was proceeded to further confirm the two electrode activity. The results show that the photoelectrocatalytic degradation efficiency of Ti/SnO2-Sb2O4 electrode with sub-layer is higher than that of simple Ti/SnO2-Sb2O4 electrode using phenol as a model organic pollutant. The Ti/SnO2-Sb2O4/SnO2-Sb2O4 photoanode has a better photoelectrochemical performance than Ti/SnO2-Sb2O4 photoanode for the removal of organic pollutants from water.