Plasmon resonance enhanced zinc oxide photoelectrodes for improvement in performance of dye sensitized solar cells

被引：1

作者：

Bora, Tanujjal ^{[1
]}

Kyaw, Htet H. ^{[1
]}

Dutta, Joydeep ^{[2
]}

机构：

[1] Center of Excellence in Nanotechnology, Asian Institute of Technology, P. O. Box 4, Klong Luang, Pathumthani-12120, Thailand

[2] Water Research Center, Sultan Qaboos University, P. O. Box 17, Al Khoud-123, Oman

来源：

Materials Science Forum | 2014年 / 771卷

关键词：

Magnetic semiconductors - Nanorods - Wide band gap semiconductors - Dye-sensitized solar cells - Gold nanoparticles - Electrolytes - Light absorption - II-VI semiconductors - Surface plasmon resonance - Metal nanoparticles - Nanocomposites - Schottky barrier diodes - Semiconducting zinc compounds;

D O I：

10.4028/www.scientific.net/MSF.771.91

中图分类号：

学科分类号：

摘要：

Nanocomposites of vertically aligned zinc oxide (ZnO) nanorod arrays incorporated with gold (Au) nanoparticles have been used as photoelectrodes to fabricate dye sensitized solar cells (DSSCs). Due to the surface plasmon resonance of the Au nanoparticles, the nanocomposite photoelectrodes demonstrate enhancement in the visible light absorption resulting in ~8% higher photocurrent compared to ZnO photoelectrode based DSSCs fabricated without any Au nanoparticles. In addition to the higher optical absorption due to the gold nanoparticles, a Schottky barrier forms at the ZnO/Au interface preventing the back electron transfer from the conduction band of the semiconductor nanorods to the redox electrolyte providing improvement in the charge separation at the nanocomposite photoelectrode. Upon incorporation of Au nanoparticles, the overall efficiency of the DSSC increased from 2. 41% to 3. 27%. The role of Au nanoparticles on the performance of the DSSCs for varying concentration of the Au nanoparticles as well as the post-growth annealing treatment of the nanocomposite photoelectrode is reported. © (2014) Trans Tech Publications, Switzerland.

引用

页码：91 / 101