Dye-sensitized solar cells based on trench structured TiO2 nanotubes in Ti substrate

Kang Pil Kim; Sang Ju Lee; Dae Hwan Kim; Dae Kue Hwang; Young Woo Heo

doi:10.1016/j.cap.2012.12.010

Dye-sensitized solar cells based on trench structured TiO₂ nanotubes in Ti substrate

Kang Pil Kim, Sang Ju Lee, Dae Hwan Kim, Dae Kue Hwang, Young Woo Heo

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

16 Scopus citations

Abstract

We have proposed dye-sensitized solar cells (DSSCs) with trench-type TiO₂ nanotube structure to improve the low device efficiency of conventional TiO₂ nanotube DSSCs using Ti substrate. Compared to the conventional standing-type TiO₂ nanotube structure based DSSCs, the trench-type TiO₂ nanotube structure based DSSCs have shown an improvement of device efficiency of approximately 40% due to the large increase of Jsc. In the trench-type TiO₂ nanotube structure, the contact area between the TiO₂ nanotube sidewall and the Ti substrate is significantly increased. This increase of contact area provides more charge transport paths than exist in the conventional standing-type TiO₂ nanotube structure and reduces the electrical resistance between the Ti substrate and the TiO₂ nanotubes. Therefore, the remarkable increase of Jsc is the result of the charge collection efficiency, which is improved due to the increase of contact area between the TiO₂ nanotube sidewall and the Ti substrate in the trench-type TiO₂ nanotube structure. The fabrication of the trench-type TiO₂ nanotube structure is an effective manufacturing process for improving the device efficiency of TiO ₂ nanotube based DSSCs using Ti substrate. DSSCs having an 11.9 mm thick trench-type TiO₂ nanotube structure have shown an efficiency of 5.74%.

Original language	English
Pages (from-to)	795-798
Number of pages	4
Journal	Current Applied Physics
Volume	13
Issue number	4
DOIs	https://doi.org/10.1016/j.cap.2012.12.010
State	Published - Jun 2013

Keywords

Charge collection
Contact area
Dye-sensitized solar cells
Trench structure

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title = "Dye-sensitized solar cells based on trench structured TiO2 nanotubes in Ti substrate",

abstract = "We have proposed dye-sensitized solar cells (DSSCs) with trench-type TiO2 nanotube structure to improve the low device efficiency of conventional TiO2 nanotube DSSCs using Ti substrate. Compared to the conventional standing-type TiO2 nanotube structure based DSSCs, the trench-type TiO2 nanotube structure based DSSCs have shown an improvement of device efficiency of approximately 40% due to the large increase of Jsc. In the trench-type TiO2 nanotube structure, the contact area between the TiO2 nanotube sidewall and the Ti substrate is significantly increased. This increase of contact area provides more charge transport paths than exist in the conventional standing-type TiO2 nanotube structure and reduces the electrical resistance between the Ti substrate and the TiO2 nanotubes. Therefore, the remarkable increase of Jsc is the result of the charge collection efficiency, which is improved due to the increase of contact area between the TiO2 nanotube sidewall and the Ti substrate in the trench-type TiO2 nanotube structure. The fabrication of the trench-type TiO2 nanotube structure is an effective manufacturing process for improving the device efficiency of TiO 2 nanotube based DSSCs using Ti substrate. DSSCs having an 11.9 mm thick trench-type TiO2 nanotube structure have shown an efficiency of 5.74%.",

keywords = "Charge collection, Contact area, Dye-sensitized solar cells, Trench structure",

author = "Kim, {Kang Pil} and Lee, {Sang Ju} and Kim, {Dae Hwan} and Hwang, {Dae Kue} and Heo, {Young Woo}",

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doi = "10.1016/j.cap.2012.12.010",

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AU - Kim, Kang Pil

AU - Lee, Sang Ju

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AU - Hwang, Dae Kue

AU - Heo, Young Woo

PY - 2013/6

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N2 - We have proposed dye-sensitized solar cells (DSSCs) with trench-type TiO2 nanotube structure to improve the low device efficiency of conventional TiO2 nanotube DSSCs using Ti substrate. Compared to the conventional standing-type TiO2 nanotube structure based DSSCs, the trench-type TiO2 nanotube structure based DSSCs have shown an improvement of device efficiency of approximately 40% due to the large increase of Jsc. In the trench-type TiO2 nanotube structure, the contact area between the TiO2 nanotube sidewall and the Ti substrate is significantly increased. This increase of contact area provides more charge transport paths than exist in the conventional standing-type TiO2 nanotube structure and reduces the electrical resistance between the Ti substrate and the TiO2 nanotubes. Therefore, the remarkable increase of Jsc is the result of the charge collection efficiency, which is improved due to the increase of contact area between the TiO2 nanotube sidewall and the Ti substrate in the trench-type TiO2 nanotube structure. The fabrication of the trench-type TiO2 nanotube structure is an effective manufacturing process for improving the device efficiency of TiO 2 nanotube based DSSCs using Ti substrate. DSSCs having an 11.9 mm thick trench-type TiO2 nanotube structure have shown an efficiency of 5.74%.

AB - We have proposed dye-sensitized solar cells (DSSCs) with trench-type TiO2 nanotube structure to improve the low device efficiency of conventional TiO2 nanotube DSSCs using Ti substrate. Compared to the conventional standing-type TiO2 nanotube structure based DSSCs, the trench-type TiO2 nanotube structure based DSSCs have shown an improvement of device efficiency of approximately 40% due to the large increase of Jsc. In the trench-type TiO2 nanotube structure, the contact area between the TiO2 nanotube sidewall and the Ti substrate is significantly increased. This increase of contact area provides more charge transport paths than exist in the conventional standing-type TiO2 nanotube structure and reduces the electrical resistance between the Ti substrate and the TiO2 nanotubes. Therefore, the remarkable increase of Jsc is the result of the charge collection efficiency, which is improved due to the increase of contact area between the TiO2 nanotube sidewall and the Ti substrate in the trench-type TiO2 nanotube structure. The fabrication of the trench-type TiO2 nanotube structure is an effective manufacturing process for improving the device efficiency of TiO 2 nanotube based DSSCs using Ti substrate. DSSCs having an 11.9 mm thick trench-type TiO2 nanotube structure have shown an efficiency of 5.74%.

KW - Charge collection

KW - Contact area

KW - Dye-sensitized solar cells

KW - Trench structure

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Dye-sensitized solar cells based on trench structured TiO₂ nanotubes in Ti substrate

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Keywords

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