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Dye-sensitized solar cells based on ...

Kim, Chaehyun.

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Dye-sensitized solar cells based on free-standing titanium dioxide nanotube arrays.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Dye-sensitized solar cells based on free-standing titanium dioxide nanotube arrays./
作者:	Kim, Chaehyun.
面頁冊數:	129 p.
附註:	Source: Dissertation Abstracts International, Volume: 72-04, Section: B, page: .
Contained By:	Dissertation Abstracts International72-04B.
標題:	Alternative Energy. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3440388
ISBN:	9781124476520

Dye-sensitized solar cells based on free-standing titanium dioxide nanotube arrays.
Kim, Chaehyun.

Dye-sensitized solar cells based on free-standing titanium dioxide nanotube arrays. - 129 p.

Source: Dissertation Abstracts International, Volume: 72-04, Section: B, page: .

Thesis (Ph.D.)--State University of New York at Buffalo, 2011.

Dye-sensitized solar cells (DSSCs) are photoelectrochemical cells using wide band gap nanoporous oxide semiconductors sensitized by dey molecules. DSSCs generally consist of photosensitive dye molecules and a titanium dioxide (TiO2) nanoparticle network. DSSCs convert light energy to electrical energy through photo-excitation of dye molecules anchored to the surface of TiO2 nanoparticles, electron injection and transport in the TiO 2 nanoparticle network. DSSCs attracted great attention due to their respectable efficiency with very low fabrication cost, good performance under diffuse light conditions, semi-transparency and multi color range possibilities, and the ability to be fabricated on flexible substrates. Its main efficiency limiting factor is the random hopping of electrons within the TiO2 nanoparticle network, which causes carrier trapping and recombination. The charge transport and collection can be enhanced by employing ordered nanostructures such as nanowire or nanotube arrays. However, DSSCs based on nanowire or nanotube arrays with power conversion efficiency higher than 11.18% achieved from the conventional DSSCs have yet to be demonstrated.

ISBN: 9781124476520Subjects--Topical Terms:

1035473
Alternative Energy.

Dye-sensitized solar cells based on free-standing titanium dioxide nanotube arrays.
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245 1 0 $a Dye-sensitized solar cells based on free-standing titanium dioxide nanotube arrays.
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500 $a Source: Dissertation Abstracts International, Volume: 72-04, Section: B, page: .
500 $a Adviser: Hao Zeng.
502 $a Thesis (Ph.D.)--State University of New York at Buffalo, 2011.
520 $a Dye-sensitized solar cells (DSSCs) are photoelectrochemical cells using wide band gap nanoporous oxide semiconductors sensitized by dey molecules. DSSCs generally consist of photosensitive dye molecules and a titanium dioxide (TiO2) nanoparticle network. DSSCs convert light energy to electrical energy through photo-excitation of dye molecules anchored to the surface of TiO2 nanoparticles, electron injection and transport in the TiO 2 nanoparticle network. DSSCs attracted great attention due to their respectable efficiency with very low fabrication cost, good performance under diffuse light conditions, semi-transparency and multi color range possibilities, and the ability to be fabricated on flexible substrates. Its main efficiency limiting factor is the random hopping of electrons within the TiO2 nanoparticle network, which causes carrier trapping and recombination. The charge transport and collection can be enhanced by employing ordered nanostructures such as nanowire or nanotube arrays. However, DSSCs based on nanowire or nanotube arrays with power conversion efficiency higher than 11.18% achieved from the conventional DSSCs have yet to be demonstrated.
520 $a This dissertation focuses on the development of DSSCs using highly crystalline free-standing TiO2 nanotube (FSTNT) arrays to enhance charge transport and collection, and hence, power conversion efficiency. TiO2 nanotube arrays were obtained by potentiostatic anodization of titanium foil in fluoride-based ethylene glycol electrolyte. TiO2 nanotube arrays were detached from the titanium foil by chemical etching and annealed at high temperatures to obtain highly crystalline anatase phase FSTNT arrays. DSSCs based on FSTNT arrays revealed high power conversion efficiency of 13.2% and short-circuit photocurrent density comparable to that of monocrystalline silicon solar cell.
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