衬底温度对Na-Mg共掺ZnO薄膜光学性能的影响

采用超声喷雾热解法,以石英玻璃为衬底,以乙酸 锌(Zn(CH₃COO)₂·2H₂O)、硝酸镁(Mg(NO₃)₂·6H₂O) 和醋酸钠(CH₃COONa·3H₂O)为前驱体溶液,在不同衬底温 度(480～560℃)下制备Na-Mg共掺杂ZnO薄膜。通过X-射线衍射(X RD)、扫描电子显微镜(SEM)、 光致发光(PL)谱和紫外-可见(UV-Vis)分光光度计等表征手段对样品的晶格结构 、表面形貌、PL性能 和透过率进行了研究。结果表明,衬底温度对薄膜结构和光学特性影响显著,当衬底温度为 500 ℃时制备的 Na-Mg共掺杂ZnO薄膜的c轴择优最明显,表面形貌更加致密,结 晶质量最好,PL性能最佳。     

Ti-Al共掺ZnO薄膜的应力、结构和光电性能研究

利用直流磁控溅射工艺,在水冷玻璃衬底上成功沉积出了高透光、低电阻率的Ti-Al共掺ZnO(TAZO)透明导电薄膜.X射线衍射(XRD)研究结果表明,TAZO薄膜为具有c轴择优取向的六角纤锌矿结构多品薄膜.研究了TAZO薄膜的应力、结构以及光电性能与薄膜厚度的关系,结果表明.当薄膜厚为531 nm时,薄膜晶格畸变最小,具...     

不同衬底沉积Ti-Al共掺杂ZnO薄膜的性能对比研究

利用直流磁控溅射法,在玻璃衬底和Si片衬底上分别沉积出了Ti-Al共掺杂ZnO透明导电薄膜(TAZO),并对这两种衬底上的薄膜的应力、结构和光电性能进行了对比研究.结果表明:玻璃衬底和Si片衬底上沉积的TAZO薄膜均为具有c轴择优取向的六角纤锌矿结构多晶薄膜,Si片衬底的TAZO薄膜的导电性能优于玻璃衬底上的TAZO薄...     

基于第一性原理的Ga-Eu共掺ZnO光电性质的研究

采用基于密度泛函理论的第一性原理方法,分析了Ga-Eu共掺杂ZnO(GEZO)结构的能带结构、态密度、马利肯布居分布以及光学性质。结果表明,计算得到的晶格常数及带隙与实验值一致。Ga,Eu的掺入贡献了导电载流子,使体系的电导率增强。费米能级进入导带,呈现n型导电。从态密度中可知费米能级处出现了由Eu的4f态引入的杂质带,Ga也在导带底处贡献了4p和4s态。原子和键的平均马利肯布居分布表明,Ga,Eu原子的掺入增强了键的离子性。光学性质方面,Ga,Eu的掺入使得介电函数实部和虚部的峰位向低能区转移,吸收率和反射率在可见光区均有提高。     

掺Al对ZnO薄膜结构和光电性能的影响

采用溶胶-凝胶工艺在普通玻璃片上制备了ZnO∶Al薄膜。通过XRD、UV透射谱和电学测试等分析方法研究了掺Al对薄膜的组织结构和光电性能的影响。分析表明:所制备的薄膜具有c轴择优取向,随着掺Al浓度的增加,(002)峰向低角度移动,峰强逐渐减弱。薄膜电阻率随掺Al浓度变化,当掺Al浓度为1.5%(摩尔分数),薄膜电阻率降至6.2×10-4Ω·cm。掺Al量的增加同时使得薄膜的禁带宽度变大,光吸收边出现蓝移现象。     

基于生长方向的P型ZnO薄膜特性的研究

利用超声雾化热分解法(USP),通过N-Al共掺的方法,制备出p型ZnO薄膜.利用霍尔测试、X射线衍射(XRD)和扫描电子显微镜分析了不同生长时间ZnO薄膜样品的电学特性、结构和表面形貌的变化.结果表明:其它条件固定时,只有在合适的生长时间条件下,才能得到电学性能较好的N-Al共掺p型ZnO薄膜(电阻率为46.8 Ω·cm、迁移率为0.05 cm2·V-1·s-1、载流子浓度是2.86×1018 cm-3.     

N/Al共掺ZnO透明导电薄膜的制备及光电性能研究

采用射频磁控溅射和退火处理方法在普通玻璃基底上制备了N、Al共掺的ZnO薄膜。利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、四探针电阻测试仪和紫外-可见光光谱及X射线光电子能谱(XPS)等测试手段,分析了溅射功率对薄膜表面形貌结构及光电性能的影响。研究结果表明:不同溅射功率下所制备的薄膜均为具有c轴择优取向的六角纤锌矿结构,在可见光范围内,平均透过率都超过了85%;在溅射功率为140W条件下,N、Al共掺的ZnO薄膜显示出p型导电特性。     

Li掺杂量对Li-N共掺ZnO薄膜光学性能的影响

本文利用溶胶-凝胶旋涂法在玻璃衬底上制备了 本征、N单掺和Li-N共掺的ZnO薄膜。 研究Li掺杂量的改变对薄膜的晶体结构、表面形貌、透过性能和发光性能的影响。采用了紫 外-可见分光光度计(UV-VIS)、光致发光谱(PL)、扫描电子显微镜(SEM)和X射线衍 射 仪(XRD)等表征手段对样品进行了测试。结果表明:Li掺杂量的改变对薄膜的结构和性能 都有一定的影响,随着Li掺杂量的增加,(002)衍射峰强度增大,晶 粒尺寸先增加后减小, 紫外发射峰的强度和薄膜的透过性能同样是先增强后减弱。当Li元素的原子比为6at%时, 薄膜的c轴择优取向明显,结晶性能最好,薄膜紫外发光最强,透过率最大。     

氮-铟共掺杂ZnO薄膜的制备及表征

以醋酸锌水溶液为前驱体,分别以醋酸铵和硝酸铟为氮(N)源和铟(In)源,采用超声喷雾热解法在石英玻璃衬底上沉积了氮铟(NIn)共掺杂ZnO薄膜。采用X射线衍射、场发射扫描电镜、霍尔效应、塞贝克效应、光致发光谱等分析方法,研究了NIn共掺杂对所得ZnO薄膜的晶体结构、电学和光学性能的影响规律。结果表明:通过氮铟共掺杂,ZnO薄膜的电学和光学性能发生明显改变。优化工艺条件下,所得ZnO基薄膜结构均匀致密,电阻率为6.75×103Ω·cm,并且在室温光致发光谱中检测到很强的近带边紫外发光峰,表明薄膜具有较理想的化学计量比和较高的光学质量。     

N-Al共掺ZnO薄膜的p型传导特性

利用直流反应磁控溅射技术制得N-Al共掺的p型ZnO薄膜,N2O为生长气氛.利用X射线衍射(XRD),Hall实验,X射线光电子能谱(XPS)和光学透射谱对共掺ZnO薄膜的性能进行研究.结果表明,薄膜中Al的存在显著提高了N的掺杂量,N以N-Al键的形式存在.N-Al共掺ZnO薄膜具有优良的p型传导特性.当Al含量为0.15wt%时,共掺ZnO薄膜的电学性能取得最优值,载流子浓度为2.52×1017cm-3,电阻率为57.3Ω·cm,Han迁移率为0.43cm2/(V·s).N-Al共掺p型ZnO薄膜具有高度c轴取向,在可见光区域透射率高达90%.     

Influence of growth time on crystalline structure, conductivity and optical properties of ZnO thin films

This paper examines the growth of ZnO thin films on glass substrate at 350 ℃ using an ultrasonic spray technique. We have investigated the influence of growth time ranging from 1 to 4 min on structural, optical and electrical properties of ZnO thin films. The as-grown films exhibit a hexagonal structure wurtzite and are (002) oriented. The maximum value of grain size G = 63.99 nm is attained for ZnO films grown at 2 min. The average transmittance is about 80%, thus the films are transparent in the visible region. The optical gap energy is found to increase from 3.26 to 3.37 eV with growth time increased from 1 to 2 min. The minimum value of electrical resistivity of the films is 0.13 Ω·cm obtained at 2 min. A systematic study on the influence of growth time on the properties of ZnO thin films deposited by ultrasonic spray at 350 ℃ has been reported.     

Effect of Fe-doping on the structural and optical properties of ZnO thin films prepared by spray pyrolysis

Fe-doped ZnO thin films have been prepared by spray pyrolysis on glass substrates and the influence of Fe-doping concentration on the structural and optical properties of the films has been studied.The X-ray diffraction (XRD) analysis shows that Fe doping has a significant effect on crystalline quality,grain size and strain in the thin films.The best crystalline structure is obtained for 3 at%Fe doping as observed from scanning electron microscopy (SEM) and XRD.However,lower or higher Fe-doping degrades the crystalline quality in turn.Moreover,UV spectroscopy demonstrates the influence of Fe-incorporation on visible range transmittance of ZnO where the best transmittance is obtained for 3 at%doping.The results have been illustrated simultaneously focusing previous results obtained from literature.     

掺铝ZnO透明导电薄膜的制备及光电性能研究

采用RF磁控溅射法制备了掺铝ZnO(AZO)透明导电薄膜,用X射线衍射仪、分光光度计和四探针仪等,研究了沉积温度对薄膜晶体结构和光电性能的影响。结果表明,AZO薄膜为六方纤锌矿结构的多晶膜,具有(002)择优取向。沉积温度对薄膜的择优取向程度、晶粒尺寸、透射率和导电性能等具有明显的影响。当沉积温度为400℃时,AZO薄膜最大晶粒尺寸为37.21nm、可见光范围平均透射率为85.5%、优良指数为1.30×10-2?-1。     

衬底温度对PLD法制备的ZnO:Ga薄膜结构和性能的影响

利用脉冲激光沉积法在石英衬底上制备了镓掺杂氧化锌(ZnO:Ga)透明导电薄膜,研究了衬底温度对薄膜的结构、表面形貌和光电性能的影响.研究表明:制备的ZnO:Ga薄膜是具有六角纤锌矿结构的多晶薄膜.随着衬底温度的增加,衍射峰明显增强,晶粒尺寸增大.当衬底温度为450℃时,薄膜的最低电阻率为8.5×10<'-4>Ω·cm,...     

溅射功率对Zr,Al共掺杂ZnO薄膜结构和性能的影响

室温下,采用直流磁控溅射法,在载玻片衬底上制备出了Zr,Al共掺杂ZnO(AZZO)透明导电薄膜。研究了溅射功率对薄膜的组织结构、表面形貌和光电学性能的影响。结果表明,制备的AZZO透明导电薄膜为六角纤锌矿结构的多晶薄膜,且具有c轴择优取向。当溅射功率为150W时,薄膜电阻率达到最小值1.66×10–3Ω·cm,在可见光区平均透过率超过93%。     

Low-temperature deposition of transparent conducting Mn-W co-doped ZnO thin films

Mn-W co-doped ZnO(ZMWO) thin films with low resistivity and high transparency were successfully prepared on glass substrate by direct current(DC) magnetron sputtering at low temperature.The sputtering power was varied from 65 to 150 W.The crystallinity and resistivity of ZMWO films greatly depend on sputtering power while the optical transmittance and optical band gap are not sensitive to sputtering power.All the deposited films are polycrystalline with a hexagonal structure and have a preferred orientat...     

冰乙酸在超声喷雾热分解法制备ZnO薄膜中的作用

采用超声喷雾热分解技术(USP),以二水醋酸锌(Zn(CH<,3>COO)<,2>·2H<,z>O)为原材料.在无碱玻璃衬底上制备了ZnO薄膜.对前驱液pH值、ZnO薄膜结构特性、表面形貌、电学和光学特性的研究结果表明,冰乙酸对ZnO薄膜生长速率具有重要影响.X射线衍射(XRD)和扫描电子显微镜(SEM)测试显示,所有...     

Effect of deposition conditions on the physical properties of Sn_xS_y thin films prepared by the spray pyrolysis technique

Tin sulfide thin films（Sn_xS_y） with an atomic ratio of y/x = 0.5 have been deposited on a glass substrate by spray pyrolysis.The effects of deposition parameters,such as spray solution rate（R）,substrate temperature （T_s） and film thickness（t）,on the structural,optical,thermo-electrical and photoconductivity related properties of the films have been studied.The precursor solution was prepared by dissolving tin chloride（SnCl₄,5H₂O） and thiourea in propanol,and Sn_xS_y thin film was prepared with a mole ratio of y/x = 0.5.The prepared films were characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM） and UV-vis spectroscopy. It is indicated that the XRD patterns of Sn_xS_y films have amorphous and polycrystalline structures and the size of the grains has been changed from 7 to 16 nm.The optical gap of Sn_xS_y thin films is determined to be about 2.41 to 3.08 eV by a plot of the variation of（αhv）² versus hv related to the change of deposition conditions.The thermoelectric and photo-conductivity measurement results for the films show that these properties are depend considerably on the deposition parameters.