Large-Area Ordered P-type Si Nanowire Arrays as Photocathode for Highly Efficient Photoelectrochemical Hydrogen Generation
Large-Area Ordered P-type Si Nanowire Arrays as Photocathode for Highly Efficient Photoelectrochemical Hydrogen Generation
复制标题
大面积有序P型硅纳米线阵列作为光电阴极实现高效光电化学制氢
DOI：
10.1021/am501168c
复制
发表时间：
2014-08-13
影响因子：
9.5
通讯作者：
Cheng, Chuanwei
中科院分区：
文献类型：
--
作者：
Huang, Shufan;Zhang, Haifeng;Cheng, Chuanwei
在这篇文章中，我们报告了成功的制造大面积有序的硅纳米线阵列（NWAs）的成本效益和可扩展的湿法刻蚀工艺结合纳米球光刻技术。进一步研究了周期性Si纳米线电极作为光电阴极分解水的性能，其最大光电流密度为27 mA cm（-2），是平面Si纳米线电极和无规Si纳米线电极的2.5倍。PEC性能的极大改善可以归因于图案化和有序的纳米线结构，这是由于光捕获以及电荷传输和收集效率的增强。
In this Article, we report the successful fabrication of large-area ordered Si nanowire arrays (NWAs) by a cost-effective and scalable wet-etching process in combination with nanospheres lithography technique. The periodical Si NWAs are further investigated as photocathode for water splitting, with excellent hydrogen evolution performances with a maximum photocurrent density of 27 mA cm(-2) achieved, which is similar to 2.5 times that of planar Si and random Si nanowires electrode. The greatly improved PEC performance can be attributed to the patterned and ordered NWs structure as a result of enhancement of the light harvesting as well as charge transportation and collection efficiency.