Ordered crystalline TiO2 nanohexagon arrays for improving conversion efficiency of dye-sensitized solar cells

Hafiz Muhammad Asif Javed; Wenxiu Que; Xingtian Yin; Yonglei Xing; Xiaobin Liu; Ali Asghar; Jinyou Shao; Ling Bing Kong

doi:10.1016/j.jallcom.2015.06.119

Ordered crystalline TiO₂ nanohexagon arrays for improving conversion efficiency of dye-sensitized solar cells

Hafiz Muhammad Asif Javed
, Wenxiu Que
, Xingtian Yin
, Yonglei Xing
, Xiaobin Liu
, Ali Asghar
, Jinyou Shao
, Ling Bing Kong

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Abstract Anatase TiO₂ nanohexagon arrays were grown by using an anodization process of Ti foil in fluoride containing electrolytes. Photoanode based on the as-grown anatase TiO₂ nanohexagon arrays for DSSCs showed a power photoconversion efficiency of 4.01% and incident photon-to-current conversion efficiency of 68%, which are significantly higher than those of the device based on anatase TiO₂ nanotube arrays. This improvement in power conversion efficiency should be attributed to the fact that the nanotubes with hexagonal structure have higher surface area to allow the uploading of more dye molecules for light harvesting. Also, the spacing introduced inside the hexagon might allow the dye molecules to cover the interior of the walls. In addition, it is believed that the photoconversion efficiency can be further increased by optimizing the hexagonal structure through the electrochemical conditions.

Original language	English
Article number	34472
Pages (from-to)	106-111
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	646
DOIs	https://doi.org/10.1016/j.jallcom.2015.06.119
State	Published - 24 Jun 2015

Keywords

Anatase
Anodization
Dye molecules
Dye-sensitized solar cells
TiO nanohexagon arrays

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10.1016/j.jallcom.2015.06.119

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title = "Ordered crystalline TiO2 nanohexagon arrays for improving conversion efficiency of dye-sensitized solar cells",

abstract = "Abstract Anatase TiO2 nanohexagon arrays were grown by using an anodization process of Ti foil in fluoride containing electrolytes. Photoanode based on the as-grown anatase TiO2 nanohexagon arrays for DSSCs showed a power photoconversion efficiency of 4.01\% and incident photon-to-current conversion efficiency of 68\%, which are significantly higher than those of the device based on anatase TiO2 nanotube arrays. This improvement in power conversion efficiency should be attributed to the fact that the nanotubes with hexagonal structure have higher surface area to allow the uploading of more dye molecules for light harvesting. Also, the spacing introduced inside the hexagon might allow the dye molecules to cover the interior of the walls. In addition, it is believed that the photoconversion efficiency can be further increased by optimizing the hexagonal structure through the electrochemical conditions.",

keywords = "Anatase, Anodization, Dye molecules, Dye-sensitized solar cells, TiO nanohexagon arrays",

author = "Javed, \{Hafiz Muhammad Asif\} and Wenxiu Que and Xingtian Yin and Yonglei Xing and Xiaobin Liu and Ali Asghar and Jinyou Shao and Kong, \{Ling Bing\}",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

year = "2015",

month = jun,

day = "24",

doi = "10.1016/j.jallcom.2015.06.119",

language = "英语",

volume = "646",

pages = "106--111",

journal = "Journal of Alloys and Compounds",

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TY - JOUR

T1 - Ordered crystalline TiO2 nanohexagon arrays for improving conversion efficiency of dye-sensitized solar cells

AU - Javed, Hafiz Muhammad Asif

AU - Que, Wenxiu

AU - Yin, Xingtian

AU - Xing, Yonglei

AU - Liu, Xiaobin

AU - Asghar, Ali

AU - Shao, Jinyou

AU - Kong, Ling Bing

PY - 2015/6/24

Y1 - 2015/6/24

N2 - Abstract Anatase TiO2 nanohexagon arrays were grown by using an anodization process of Ti foil in fluoride containing electrolytes. Photoanode based on the as-grown anatase TiO2 nanohexagon arrays for DSSCs showed a power photoconversion efficiency of 4.01% and incident photon-to-current conversion efficiency of 68%, which are significantly higher than those of the device based on anatase TiO2 nanotube arrays. This improvement in power conversion efficiency should be attributed to the fact that the nanotubes with hexagonal structure have higher surface area to allow the uploading of more dye molecules for light harvesting. Also, the spacing introduced inside the hexagon might allow the dye molecules to cover the interior of the walls. In addition, it is believed that the photoconversion efficiency can be further increased by optimizing the hexagonal structure through the electrochemical conditions.

AB - Abstract Anatase TiO2 nanohexagon arrays were grown by using an anodization process of Ti foil in fluoride containing electrolytes. Photoanode based on the as-grown anatase TiO2 nanohexagon arrays for DSSCs showed a power photoconversion efficiency of 4.01% and incident photon-to-current conversion efficiency of 68%, which are significantly higher than those of the device based on anatase TiO2 nanotube arrays. This improvement in power conversion efficiency should be attributed to the fact that the nanotubes with hexagonal structure have higher surface area to allow the uploading of more dye molecules for light harvesting. Also, the spacing introduced inside the hexagon might allow the dye molecules to cover the interior of the walls. In addition, it is believed that the photoconversion efficiency can be further increased by optimizing the hexagonal structure through the electrochemical conditions.

KW - Anatase

KW - Anodization

KW - Dye molecules

KW - Dye-sensitized solar cells

KW - TiO nanohexagon arrays

UR - https://www.scopus.com/pages/publications/84934996237

U2 - 10.1016/j.jallcom.2015.06.119

DO - 10.1016/j.jallcom.2015.06.119

M3 - 文章

AN - SCOPUS:84934996237

SN - 0925-8388

VL - 646

SP - 106

EP - 111

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 34472

ER -

Ordered crystalline TiO₂ nanohexagon arrays for improving conversion efficiency of dye-sensitized solar cells

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Keywords

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