ZnO纳米线阵列的制备及其光电性能研究  

Research on Preparation and Photoelectric Properties of ZnO Nanowire Arrays

作　　者：党威武[1] 张永军[1] 徐秀娟[1] 李燕[2] DANG Wei-wu;ZHANG Yong-jun;XU Xiu-juan;LI Yan(College of Mechanics/Shaanxi Institute of Technology, Xi′an 710300, China;School of Materials Science & Engineering/Xi′an Jiaotong University, Xi′an 710049, China)

机构地区：[1]陕西国防工业职业技术学院机械工程学院,陕西西安710300 [2]西安交通大学材料科学与工程学院,陕西西安710049

出　　处：《山东农业大学学报（自然科学版）》2017年第2期268-272,共5页Journal of Shandong Agricultural University：Natural Science Edition

基　　金：陕西国防工业职业技术学院2015年科研基金资助项目(Gfy15-01)

摘　　要：本文采用较低温度、无催化剂条件下的化学气相沉积法(Chemical vapor deposition,CVD)在透明导电玻璃上制备ZnO纳米线阵列,分析讨论反应温度、保温时间对产物形貌的影响,并将其分别制成染料敏化太阳电池(Dye-sensitized solar cell,DSC)光阳极,探究DSC光电性能的变化情况。结果表明:沉积温度为500℃时,在透明导电玻璃上得到均匀、致密、长径比大的ZnO纳米线阵列。此外,大长径比的ZnO纳米线阵列作为光阳极组装的DSC具有较好的光电性能,主要原因是大长径比的ZnO纳米线有利于染料分子的负载,提高入射光的利用率,另外,ZnO纳米线作为一维纳米材料有利于电子空穴的分离、传输,综合表现出较高的光电转化效率。同时,进一步探讨敏化过程对DSC光电性能的影响。研究发现,随着敏化时间的延长,DSC光电转化效率反而降低,可见,合理的敏化时间对保证电极稳定性、获得较好电池光电性能至关重要。The ZnO nanowire arrays were prepared on the transparent conductive glass by catalyst-free chemical vapor deposition method(CVD)at a low temperature.The correlation between the microstructure of the ZnO nanowires and the reaction temperature and reaction time were studied.Furthermore the prepared ZnO nanowires were used as the photoanode of the dye-sensitized solar cell(DSC),and also their output performance were studied.Results showed that the ZnO nanowire arrays presented a uniform,dense and large ratio of length to diameter morphorlogy at the deposition temperature of500°C,which illustrated that the deposition temperature played an important role in ZnO nucleation and growth.When the prepared ZnO nanowire arrays were used in DSC,it showed the highest output performance for its more dye molecules loading,enhanced incident light abstrobing and fast exaction separation.Moreover,the influence of the sensitization duration on theDSC photoelectric performance was also investigated Results showed that photoelectric conversion efficiency decreased with increasing the sensitization time.In all,reasonable sensitization time is critical for the electrode stability and the high performance solar cells.

关 键 词：ZNO 纳米线阵列 化学气相沉积 染料敏化太阳电池 

分 类 号：TQ132.4[化学工程—无机化工]