Effect of growth time on morphology and photovoltaic properties of ZnO nanowire array films
来源期刊：Rare Metals2011年第6期
论文作者：YANG Weiguanga, WANG Yalib, ZHEN Qiang b, and SHI Weimina a Department of Electronic Information Materials, School of Materials Science and Engineering, Shanghai University, Shanghai , China b Nano-Science and Nano-Technology Research Center, School of Materials Science and Engineering, Shanghai University, Shanghai , China
文章页码：676 - 680
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 den-sity of 4.31 mA-cm-2 and allover energy conversion efficiency of 0.87% were achieved with 12.9-μm-long ZnO nanowire arrays.
YANG Weiguanga, WANG Yalib, ZHEN Qiang b, and SHI Weimina a Department of Electronic Information Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China b Nano-Science and Nano-Technology Research Center, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
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 den-sity of 4.31 mA-cm-2 and allover energy conversion efficiency of 0.87% were achieved with 12.9-μm-long ZnO nanowire arrays.
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