Effect of growth time on morphology and photovoltaic properties of ZnO nanowire array films  

作　　者：YANG Weiguang WANG Yali ZHEN Qiang SHI Weimin 

机构地区：[1]Department of Electronic Information Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China [2]Nano-Science and Nano-Technology Research Center, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China

出　　处：《Rare Metals》2011年第6期676-680,共5页稀有金属（英文版）

基　　金：financially supported by the National Science Foundation of China (Nos.10775096 and 51072112);China Postdoctoral Science Foundation (No.20100480579);Key Subject of Shanghai Municipal Education Commission (No.J50102);Special Research Foundation for Training and Selecting Outstanding Young Teachers of Universities in Shanghai;Innovation Foundation of Shanghai University;Nature Science Foundation of Shanghai (No.06ZR14035);Shanghai Leading Academic Disciplines (No.T0101)

摘　　要：Single-crystalline ZnO nanowire arrays with different aspect ratios and nanowire densities were prepared by the hydrothermal growing method using polyethyleneimine （PEI） as a surfactant. PEI can only hinder the lateral growth of the ZnO nanowires, which is observed by high resolution transmission electron microscopy （HRTEM） analysis. Dye-sensitized solar cells were assembled by the ZnO nanowire arrays with different thicknesses, which can be controlled by the growing time and characterized using photocurrent-voltage measurements. Their photocurrent densities and energy allover conversion efficiencies increased with increasing ZnO nanowire lengths. Short-circuit current density of 4.31 mA.cm-2 and allover energy conversion efficiency of 0.87% were achieved with 12.9-μm-long ZnO nanowire arrays.Single-crystalline ZnO nanowire arrays with different aspect ratios and nanowire densities were prepared by the hydrothermal growing method using polyethyleneimine （PEI） as a surfactant. PEI can only hinder the lateral growth of the ZnO nanowires, which is observed by high resolution transmission electron microscopy （HRTEM） analysis. Dye-sensitized solar cells were assembled by the ZnO nanowire arrays with different thicknesses, which can be controlled by the growing time and characterized using photocurrent-voltage measurements. Their photocurrent densities and energy allover conversion efficiencies increased with increasing ZnO nanowire lengths. Short-circuit current density of 4.31 mA.cm-2 and allover energy conversion efficiency of 0.87% were achieved with 12.9-μm-long ZnO nanowire arrays.

关 键 词：inorganic non-metal materials ZnO nanowires hydrothermal growth MORPHOLOGY 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TN141[电子电信—物理电子学]