Dye-sensitized solar cells based on ZnO nanowire array/TiO2 nanoparticle composite photoelectrodes with controllable nanowire aspect ratio

Content Provider	Semantic Scholar
Author	Qi, Lihong Yu, Hailong Lei, Zhenyu Wang, Qingshan Ouyang, Qiuyun Li, Chunyan Chen, Yujin
Copyright Year	2013
Abstract	The ZnO nanowire (NW) array/TiO2 nanoparticle (NP) composite photoelectrode with controllable NW aspect ratio has been grown from aqueous solutions for the fabrication of dye-sensitized solar cells (DSSCs), which combines the advantages of the rapid electron transport in ZnO NW array and the high surface area of TiO2 NPs. The results indicate that the composite photoelectrode achieves higher overall photoelectrical conversion efficiency (η) than the ZnO NW alone. As a result, DSSCs based on the ZnO NW array/TiO2 NP composite photoelectrodes get the enhanced photoelectrical conversion efficiency, and the highest η is also achieved by rational tuning the aspect ratio of ZnO NWs. With the proper aspect ratio (ca. 6) of ZnO NW, the ZnO NW array/TiO2 NP composite DSSC exhibits the highest conversion efficiency (5.5 %). It is elucidated by the dye adsorption amount and interfacial electron transport of DSSCs with the ZnO NW array/TiO2 NP composite photoelectrode, which is quantitatively characterized using the UV-Vis absorption spectra and electrochemical impedance spectra. It is evident that the DSSC with the proper aspect ratio of ZnO NW displays the high dye adsorption amount and fastest interfacial electron transfer.
Starting Page	279
Ending Page	284
Page Count	6
File Format	PDF HTM / HTML
DOI	10.1007/s00339-012-7519-9
Volume Number	111
Alternate Webpage(s)	http://www.ime.cas.cn/icac/learning/learning_3/201907/P020190707571905493617.pdf
Alternate Webpage(s)	https://doi.org/10.1007/s00339-012-7519-9
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article