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Nanotubes-Based Dye-Sensitized Solar Cell

Speaker: Huang Qiyu, School of Microelectronics, Shanghai Jiao Tong University

When: 16:00, April 01, 2011
Where: Meeting Room 100, SEIEE Building 3

Topic: Dye-Sensitized Solar Cell Based on Photoanodes of Porous Titanium Dioxide Nanotubes

Abstract:

Dye-sensitized solar cell (DSSC) only requires simple manufacturing processes, comparatively low expenditure on materials and boasts potential of high photovoltaic conversion efficiency, making it an important research direction for solar cells. DSSC holds wide prospects of application.

The property of TiO2 thin-film electrode, which is related to the factors including structure, crystal form and micro dimensions of TiO2, is an important factor in photovoltaic conversion efficiency.

Traditional irregular TiO2 porous membrane is replaced by TiO2 nanotube arrays with regular structure, which increases absorption areas of TiO2 thin-film dye, and allows the rapid conduction of photoinduced carriers along the nanotube. Besides, charge losses along boundaries of nanoparticles are reduced, recombination probability of electrons decreased, and the efficiency of photon capture improved, promoting photovoltaic conversion efficiency of DSSC.

We prepared thin-film electrode of TiO2 nanotube by anodizing, and studied the impact of factors such as compositions of organic electrolyte, viscosity of electrolyte, oxidation voltage, oxidation time and annealing temperature on microstructure, crystal form and properties of nanotube. Anodic oxidation reaction of TiO2 growth based on different substrates is discussed. To study photovoltaic conversion performance, dye solution, electrolyte and thermoplastic packaging solar cell are further prepared respectively. The assembled DSSC has a photovoltaic conversion efficiency of 6.79%, open-circuit voltage 0.884V, short-circuit current 14.15mA, fill factor 0.568. Based on this, and in connection with our researches carried out, suggestions are proposed for improving dye-sensitized solar cell based on TiO2 nanotubes.

If you have the intension to make an academic report, please contact Yang Tian, UM-SJTU Joint Institute, via tianyang@sjtu.edu.cn, or by 34207219.

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