透明导电In_2O_3:Sn和ZnO:Al薄膜的制备及其特性研究
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摘要
透明导电氧化物薄膜材料具有大的载流子浓度和光学禁带宽度,因而表现出优良的光电特性,如低的电阻率和高的可见光透过率等。目前此类材料体系包括:In2O3、SnO2、ZnO及其掺杂体系In2O3:Sn(ITO)、SnO2:Sb、SnO2:F、ZnO:Al(ZAO)等。其中SnO2(TO)和In2O3:Sn(ITO)薄膜作为透明电极在液晶显示和太阳能电池等领域得到实际应用。ZnO:Al(ZAO)薄膜具有优良的光电特性而成为ITO薄膜的潜在替代材料,而且具有原材料来源丰富、成本低廉、无毒以及在氢等离子体中具有较好的稳定性等优点。
    多种工艺可以用来制备透明导电薄膜,如磁控溅射、真空反应蒸发、化学气相沉积,溶胶-凝胶法以及脉冲激光沉积等。其中磁控溅射工艺具有沉积速率高、均匀性好等优点而成为一种广泛应用的成膜方法。
    本研究课题以氧化铟锡靶和氧化锌铝靶为靶材,采用射频磁控溅射工艺在纯氩气氛中沉积ITO和ZAO薄膜,靶材中SnO2和Al2O3的掺杂比例分别为10%和3%,成膜过程中研究了各工艺参数对其结构和光电特性的影响。另外采用了在氩和氧的混合气氛中共溅射锌靶和铝靶的方法来制备铝掺杂氧化锌薄膜,铝的掺杂量由施加在铝靶上的功率大小决定。
    研究表明:在基底温度为300℃时,ITO薄膜具有(222)晶面的择优取向,由于Sn4+对In3+的置换而出现晶格收缩现象,薄膜的最小电阻率和可见光范围透过率分别为6.8×10-4Ωcm和80%。ZAO薄膜在低温下沉积时,由于薄膜内存在残余应力使衍射峰位置与体材相比向低角度方向移动;高温沉积的ZAO薄膜经热处理后具有c轴择优取向的六角纤锌矿多晶结构,晶粒垂直于衬底柱状生长,薄膜的最小电阻率和可见光透过率分别为7.5×10-4Ωcm和85%。
    双靶共溅沉积ZAO薄膜时,氧流量和基片温度是影响薄膜特性的重要因素,随着铝靶射频功率增加,由于铝的掺杂使薄膜表面方块电阻降低,当功率为120W时,沉积的薄膜具有最小的电阻值。当功率大于120W时,功率进一步增加,薄膜的导电性变差。
Due to big carrier concentration and optical band gap,transparent conductive oxide thin films exhibit outstanding optical and electrical properties,such as low resistivity and high transmittance in the visible range etc.At present,this kind of material system include In2O3,SnO2,ZnO and dopant system In2O3:Sn(ITO),SnO2:Sb,SnO2:F,ZnO:Al(ZAO) etc.Among them,SnO2(TO) and In2O3:Sn(ITO) films have been widely used in liquid crystal display and solar cell as transparent electrode.Al-doped ZnO films show good electrical and optical properties and emerge as a potential alternative candidate for ITO films.Furthermore,they offer a number of advantages compared to the predominant ITO films nowadays:(i) cheap and abundant raw materials;(ii) nontoxicity;(iii) good stability in hydrogen plasma,which is of significance for applications related to amorphous silicon solar cell.
    Many processes are used to prepare transparent conductive films such as magnetron sputtering,vacuum reactive evaporation,chemical vapor deposition,sol-gel,laser-pulsed deposition.Among these methods,magnetron sputtering is the most widely used technique for preparing thin films owing to its high deposition rate and good uniformity etc.
    ITO and ZAO films were prepared by RF magnetron sputtering in pure argon gas atmosphere using In2O3 and ZnO target mixed with SnO2(10wt%) and Al2O3 (3wt%) respectively,and the effect of process parameters on the structural,electrical and optical properties of ITO and ZAO films werestudied.In addition,ZAO films were deposited by reactive magnetron co-sputtering from two separate metallic targets of Zn(DC) and Al(RF) in Argon and oxygen atmosphere. During deposition,Al concentration was determined by the RF power of Al target.
    ITO thin films deposited at the substrate temperature of 300℃ have preferred orientation of (222),the lattice shrinkage is ascribed to the replacement of Sn4+ for In3+,the visible transmittance of 80% and the minimum specific resistance of 6.8×10-4Ωcm were obtained.The peak position of ZAO films prepared at low temperature shifts to the lower angle comparable to that of bulk ZnO due to the residual stress;as-deposited post-annealed ZAO films was polycrystalline with the hexagonal crystal structure and had a strongly preferred orientation of c axis perpendicular to
    
    the substrate surface,the minimum resistivity and average transmittance to the visible light are 7.5×10-4Ωcm and 85% respectively。
    During deposition of ZAO films,oxygen and substrate temperature have great influence on the optical and electrical properties.The surface sheet resistance decreases with increasing RF power of Al target,ZAO thin films show minimum resistivity at the power of 120W.The conductivity get worse with further increase in RF power.
引文
[1]殷顺湖,透明导电膜研究进展,材料导报,1997,11(3):33-37.
    [2]韩雪,夏慧,吴丽君.透明导电膜及靶材.电子元件与材料,1998年第1期: 30-34.
    [3]孟扬,杨锡良.新型透明导电薄膜In2O3:Mo.真空科学与技术,2000,20(5):331-335.
    [4]彭栋梁,蒋生蕊,李斌.射频反应溅射沉积透明导电CdIn2O4薄膜.薄膜科学与技术,1993,6(1):28-31.
    [5]赵谢群,透明导电氧化物薄膜研究现状与产业化进展,电子元件与材料,2000,2:40-41.
    [6]Choong Hoon Yi,Itaru Yasui,Yuzo SHIGESATO.Effects of tin concentrations on structural characteristics and electrooptical properties of tin-doped indium oxide films prepared by rf magnetron sputtering.Jpn.J.Appl.Phys,Vol.34(1995):600-605.
    [7]程珊华,李育峰,宁兆元.在有机玻璃基底上制备ITO透明导电膜.微细加工技术.1996年第2期:54-57.
    [8]岳锡华,越屹,张维佳.ITO透明导电膜的制备及性能.航空学报,1996,17(1):57-63.
    [9]T.J.Vink,W.walrave,J.L.C.Daams,P.C.Baarslag,J,E.A.M.van den Meerakker.On the homogeneity of sputter-deposited ITO films :Stress and microstructure.Thin Solid Films,266(1995):145-151.
    [10]朱社林,崔容强,先进的透明导电薄膜——ZnO,新能源,1991,13(3):1-3.
    [11]范志新,陈玖琳,孙以材.二氧化锡薄膜的最佳掺杂含量理论表达式.电子器件,2001,24(2):132-135.
    [12]姜斌,李斌.化学法制备二氧化锡透明导电膜的研究.山东化工,1998年第1期:14-16.
    [13]郭玉忠,王剑华.掺杂SnO2透明导电薄膜电学及光学性能研究.无机材料学报,2002,17(1).
    [14]张旭苹,陈国平.电致变色玻璃研究的现状.新型建筑材料,1995年第9期.
    [15]J.F.Chang,H.L.Wang,M.H.Hon.Studying of transparent conductive ZnO:Al thin films by RF reactive magnetron sputtering.Journal of Crystal Growth,211(2000):93-97.
    [16]范志新、陈玖琳,孙以材.AZO透明导电薄膜的特性、制备及应用.真空,2000,5:10-13.
    [17]孙超,陈猛,裴志亮,曹鸿涛,黄荣芳,闻立时.透明导电膜ZnO:Al(ZAO)的组织结构与特性.材料研究学报,2002,16(2):113-120.
    [18]贺洪波,易葵,范正修.ZnO薄膜的光学性质研究.光学学报,1998,18(6):799-801.
    [19]张德恒,透明导电膜中光吸收边的移动,半导体杂志,1998,23(2):34-43.
    
    
    [20]王建恩,王运涛,王军,张兵临,何金田,张艳兰.三氧化二铟基透明导电膜光、电特性的研究.功能材料,1995,26(2):141-146.
    [21]马瑾,赵俊卿,李淑英,马洪磊.有机材料衬底ITO透明导电膜的结构和导电特性研究.半导体学报,1998,19(11):841-845.
    [22]M.A.奥默尔,固体物理学基础,北京师范大学出版社,1987年6月.
    [23]陈猛,白雪冬,黄荣芳,闻立时.In2O3:Sn和ZnO:Al透明导电薄膜的结构及其导电机制.半导体学报,2000,21(4):394-399.
    [24]Tadatsugu Minami,Takashi Yamamoto,Toshihiro Miyata.Highly transparent and conductive rare earth-doped ZnO thin films prepared by magnetron sputtering.Thin Solid Films,366(2000):63-68.
    [25]钟伯强,俞大畏,潘惠英.用于液晶显示的透明导电膜.无机材料学报,1995,10(1):125-128.
    [26]李玉增,ITO薄膜产业化进程概述,世界有色金属,1998年第11期:11-15.
    [27]吴广明等,一种性能可调的新型节能材料—电致变色膜,材料科学与工程,
    1996,14(3).
    [28]段学臣,杨向萍.新材料ITO薄膜的应用和发展.稀有金属与硬质合金,1999年9月总第138期:58-60.
    [29]Groenen R,Linden J L,Van Lierop H R M,Schram DC,Kuypers A D,van de sanden MCM, An expanding thermal plasma for deposition of surface textured ZnO:Al With focus on thin film solar cell applications[J] .Applied Surface Science,2001(173):40~43.
    [30]姜燮昌、胡勇.ITO透明导电玻璃的应用前景及工业化生产.真空,1995年12月,第6期:1-8.
    [31]D.Dimova-Malinovska,N.Tzenov,M.Tzolov,L.Vassilev.Optical and electrical properties of R.F. magnetron sputtering ZnO:Al thin films.Material Science and Engineering ,B52(1998):59-62.
    [32]Jyh-Ming Ting,B.S.Tsai.DC reactive sputter deposition of ZnO:Al thin film on glass.Material Chemistry and Physics,72(2001):273-277.
    [33]R.N.Joshi,V.P.Singh,J.C.McClure.Characteristics of indium tin oxide deposited by r.f.magnetron sputtering.Thin solid Films,257(1995):32-35.
    [34]R.Mientus,K.Ellmer.Reactive magnetron sputtering of tin-doped indium oxide (ITO):influence of argon pressure and plasma excitation.Surface and Coating Technology,142-144(2001):748-754.
    [35]Hahn B, Heindel G, Pschorr E ,et al .MOCVD layer growth of ZnO and tertiary butanol[J], Semicond Sci Technol ,1998(13).
    
    
    [36] Myong S Y, Baik S J ,Lee C H ,et al .Extremely transparent and conductive ZnO:Al thin film prepared by photo-assisted metal organic chemical vapor deposition using AlCl3(6H2O) as new doping maerial[J] .Jpn J Appl Phys(part2),1997 ,36(8B).
    [37]赵俊卿,马瑾,李淑英,马洪磊.有机薄膜衬底ITO透明导电膜的结构和光电特性.半导体学报,1998,19(10):752-755.
    [38]Schuler T,Aegerter M A.optical electrical and structutal properties of solgel ZnO:Al coating[J].Thin Solid Films,2001,351(1-2):125-131.
    [39]Jimenez-Gonzalez A E,Soto Urueta J A.optical transmittance and photoconductivity studies on ZnO:Al thin films prepared by sol-gel technique[J],Solar Energy aterials and Solar Cells,1998,52:345~353.
    [40]施昌勇,沈克明.溅射电压和铝掺杂对透明导电氧化锌薄膜性能的影响.稀有金属,2000,24(2):154-156.
    [41] 葛水兵,程珊华,宁兆元.ZnO:Al透明导电膜的制备及其性能的研究.材料科学与工程,2000,18(3):77~79.
    [42] Mondragon-Suarez H,Maldonado A,Reyes A,et al.ZnO:Al thin films obtained by chemical spray:effect of the Al concentration[J].Applied Surface Science,2002,193:52~59.
    [43]B.Szyszka.Transparent and conductive aluminum doped zinc oxide films prepared by mid-frequency reactive magnetron sputtering.Thin Solid Films,351(1999):164-169.
    [44]Tadatsugu MINAMI,Hirotoshi SATO,Hideyuki IMAMOTO,Shinzo TAKATA.Substrate Temperature Dependence of Transparent Conducting Al-Doped ZnO Thin Films prepared by Magnetron Sputtering,Jap.J.Appl.Phys.Vol.31(1992),Part2.No.3A:257-260.
    [45]Terzini E, Thilakan P, Minarini C.Properties of ITO thin films deposited by RF magnetron sprttering at elevated substrate temperature[J].Materials Science and Engineering, B77(2000):110-114.
    [46]裴志亮、谭明晖,陈猛,孙超,黄荣芳.透明导电氧化物ZnO:Al(ZAO)薄膜的研究.金属学报,2000,36(1):72-76.
    [47]JIN Z C,HAMBERG I,GRANQVIST C G.Reactively sputtered ZnO:Al films for energy efficient windows.Thin Solid Films,1998,164:381-386.
    [48]MINAME T,HANTO H,SATO H,et al.Effect of applied external magnetic field on the relationship between the arrangement of the substrate and the resistivity of aluminum-doped ZnO thin films prepared by rf magnetron sputtering.Thin Solid Films,1998,164:275-279.
    [49]黄焱球、刘梅冬,曾亦可,刘少波.ZnO薄膜及其性能研究进展.无机材料学报,2001,16(3):392-397.
    
    
    [50]HU J,GORDON R G.Textured aluminum-doped zinc oxide thin films from atmospheric pressure chemical vapor deposition.Appl Phys,1992,71(2):880-890.
    [51]杨邦朝,薄膜物理与技术,成都:电子科技大学出版社,1993年.
    [52]马瑾、李淑英.真空反应蒸发法制备ZnO透明导电膜.山东大学学报(自然科学版),1994,29(2).
    [53]史济群,周京英,马稚尧,马洪磊.电子束法沉积ITO透明导电膜的研究.华中理工大学学报,1998,26(3):10-12.
    [54]赵谢群,邱向东,林鸿溢.氧化锌薄膜的研究与开发进展.半导体技术,1998,23(6):8-12.
    [55]姜海青,王连星,赵世民,惠春.溶胶-凝胶法制备Al3+离子掺杂型ZnO薄膜与评价.功能材料,2000,31(3):278-280.
    [56]施昌勇,温度和氧流量对透明导电ZnO(Al)膜性能的影响,北京服装学院学报,1999,19(2):52-56.
     [57]葛水兵,程珊华,宁兆元,沈明荣.掺杂比和氧分压对脉冲激光沉积ZnO:Al膜性能影响的研究.材料科学与工艺,2000,8(2):86-88.
    [58]侯鹤岚、张世伟等.溅射靶的开发与应用.真空,2000年第1期:37-39.
    [59]茅昕辉,陈国平,陈公乃,张随新,张旭苹.直流磁控反应溅射沉积ITO透明导电膜的研究.光电子技术,1995,15(1):72-77.
    [60]杨田林、张德恒.射频磁控溅射制备的柔性衬底ZnO:Al透明导电膜的研究.ACTA ENERGIAE SOLARIS SINICA,1999,20(2).
    [61]陈源、张德恒,马瑾,杨田林.不同有机衬底上沉积的ZnO:Al透明导电膜的研究.半导体杂志,1999,24(3):1-4.
    [62]殷景华、王雅珍等,功能材料概论,哈尔滨:哈尔滨工业大学出版社,1999年元月.
    [63]赵化侨,等离子体化学与艺,合肥:中国科学技术大学出版社,1993年.
    [64]侯鹤岚,直流磁控溅射镀膜在玻璃涂层技术中的应用,真空,2001年2月,第1期:18-22.
    [65]王平,杨树贞,史秋华.溅射成膜中几个问题的探讨,真空,2000,6:35-37.
    [66]Li-Jian Meng,M.P.dos Santos.Influence of the target-substrate distance on the properties of indium tin oxide films prepared by radio frequency reactive magnetron sputtering.J.Vac.Sci.Technol.A18(4),Jul/Aug2000:1668-1671.
    [67]陈猛,白雪冬,黄荣芳,闻立时.软基片上ITO薄膜的光电特性.功能材料与器件学报,1999,5(1):61-65.
    [68]杨志伟,韩圣浩,杨田林,赵俊卿,马瑾,马洪磊.偏压磁控溅射法在水冷柔性衬底上制备ITO透明导电膜.物理学报,2000,49(6):1196~1201..
    [69]T.C.Gorjanc,D.Leong,C.Py,D.Roth.Room temperature deposition of ITO using magnetron
    
    sputtering[L].Thin Solid Film, 413(2002):181-185.
    [70]I.Baia,B.Fernandes,P.Nunes,M.Quintela,R.Martins .Influenceof the process parameters on structural and electrical properties of r.f. magnetron sputtering ITO films.Thin Solid Films,383(2001):244-247.
    [71]Ellmer K, Kudella F,Mientus R,Schieck R,Fiechter S.Influence of discharge pararmeters on the layer properties of reactive magnetron sputtered ZnO:Al films[J].Thin Solid Films,247(1994):15-23.
    [72]Sato H, Minami T,Tamura Y,et al.Aluminium content dependence of milky transparent conducting ZnO:Al films with textured surface prepared by d.c.magnetron sputtering[J].Thin Solid Films,1994,246:86~91.
    [73]Chen M,Pei Z L,Wang x,et al.Structural,electrical,and optical properties of transparent conductive oxide ZnO:Al films prepared by magnetron reactive sputtering[J].J vac Sci Technol,2001,A19(3):963~970.
    [74]姜健、巴德纯,闻立时.ZnO:Al薄膜的制备和工艺参数对其电阻率的影响,真空,2000,6:24-28.
    [75]Fenske.F,Fuhs W,Nebauer E,Schopke A, Selle B,Sieber I.Transparent conductive ZnO:Al films by reactive co-sputtering from separate metallic Zn and Al targets[J].Thin Solid Films,343-344(1999):130-133.
    [76]王明利,范正修.在未加热基底上反应共溅ITO薄膜的光电特性.光电工程,1994,21(4):52-75.
    [77]Nunes P,Costa D,Fortunato E,Matins R.Performances presented by zinc oxide thin films deposited by r.f. magnetron sprttering[J].Vacuum ,64(2002):293~297.
    [78]Fortunato E,Nunes P,Costa D,Brida D,Ferreira I,Martins R.Characterization of aluminium doped zinc oxide thin films deposited on polymeric substrate[J].Vacuum, 64(2002):233-236.
    [79]Li Jian Meng,M.P.dos Santos.Direct current reactive magnetron sputtered zinc oxide thin films-the effect of the sputtering pressure[J].Thin Solid Films,250(1994):26-32.
    [80]Yasuhiro Igasaki,Hirokazu Kanma.Argon gas pressure dependence of the properties of transparent conducting ZnO:Al films deposited on glass substrates[J].Applied Surface Science,2001(169~170):508~511.
    [81]J.F.Chang,H.L.Wang,M.H.Hon.Studying of transparent conductive ZnO:Al thin films by RF reactive magnetron sputtering[J].Journal of Crystal Growth,211(2000):93-97.
    [82]倪星元,吴永刚,吴广明,周箴.RF反应溅射条件对ZnO透明导电薄膜的影响.材料科学与工程,1998,16(2):43-45。

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