Enhancement of electron lifetime in dye-sensitized solar cells using anodically grown TiO2 nanotube/nanoparticle composite photoanodes

被引：28

作者：

Lamberti, Andrea ^{[1
,2
]}

Sacco, Adriano ^{[1
]}

Bianco, Stefano ^{[1
]}

Quaglio, Marzia ^{[1
]}

Manfredi, Diego ^{[1
]}

Pirri, Candido Fabrizio ^{[1
,2
]}

机构：

[1] Ist Italiano Tecnol, Ctr Space Human Robot PoliTo, I-10129 Turin, Italy

[2] Politecn Torino, Appl Sci & Technol Dept, I-10129 Turin, Italy

来源：

MICROELECTRONIC ENGINEERING | 2013年 / 111卷

关键词：

Dye-sensitized solar cell; TiO2; nanotubes; Anodic oxidation; Electron lifetime; Charge transport; CONVERSION EFFICIENCY;

D O I：

10.1016/j.mee.2013.03.037

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Dye-sensitized solar cells (DSCs) based on TiO2 nanotube/nanoparticle (NT/NP) composite photoanodes were fabricated including different NT content into the NP network. The NPs expose large surface area for the dye anchoring, while the incorporated nanotubes can improve the electron lifetime and scatter the incident photons enhancing the light harvesting. TiO2 NTs were fabricated by fast anodic oxidation of Ti foil and mixed into NP dispersion. Morphology of the as-grown NTs and of the prepared paste was investigated by means of Field Emission Scanning Electron Microscopy. DSCs were assembled and characterized by current-voltage electrical measurements and Incident Photon-to-electron Conversion Efficiency. Electrochemical Impedance Spectroscopy and Open Circuit Voltage Decay measurements were employed in order to study the recombination and to evaluate the electron lifetime into the anode materials. The overall photo-conversion efficiency of the NT/NP composite photoanode was found to be a 10% higher with respect to pure NP electrode evidencing an improvement of the charge lifetime. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：137 / 142

页数：6

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