Tungsten doped titanium dioxide nanowires for high efficiency dye-sensitized solar cells

ABSTRACTThe titanium dioxide (TiO2) nanoparticle (NP) structure has higher surface area and dye loading value to increase photon absorption while the nanotube (NT) can suppress the random walk phenomena to enhance carrier collection. In this work, hydrothermal method was utilized to infiltrate the TiO2 nanotube array by TiO2 nanoparticles with the aim of combining the advantages of both nanostructures to improve dye sensitized solar cells (DSSCs) efficiency. Structure morphology, device performance, and electrochemical properties were investigated. SEM observation confirmed that around 10 nm TiO2 nanoparticles uniformly covered the NT wall. TiO2 NT samples at three different lengths: 8 μm, 13 μm and 20 μm, decorated with different amount of nanoparticles were studied to optimize the structure for light absorption and electron transport to achieve high solar conversion efficiency. Electrochemical impedance spectroscopy (EIS) was also employed to investigate the cells’ parameters: electron lifetime (τ), diffusion length (Ln) et al, to gain insight on the device performance. The incident photon conversion efficiency (IPCE) was also reported.

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High-efficiency dye-sensitized solar cells based on ultra-long single crystalline titanium dioxide nanowires

Journal of Power Sources ◽

10.1016/j.jpowsour.2014.05.022 ◽

2014 ◽

Vol 266 ◽

pp. 440-447 ◽

Cited By ~ 32

Author(s):

Lanfang Que ◽

Zhang Lan ◽

Wanxia Wu ◽

Jihuai Wu ◽

Jianming Lin ◽

...

Keyword(s):

Titanium Dioxide ◽

Solar Cells ◽

High Efficiency ◽

Dye Sensitized Solar Cells ◽

Single Crystalline ◽

Dye Sensitized ◽

Sensitized Solar Cells

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Visible-light-response iodine-doped titanium dioxide nanocrystals for dye-sensitized solar cells

Journal of Materials Chemistry ◽

10.1039/c0jm03327h ◽

2011 ◽

Vol 21 (11) ◽

pp. 3877 ◽

Cited By ~ 63

Author(s):

Qian Hou ◽

Yanzhen Zheng ◽

Jian-Feng Chen ◽

Weilie Zhou ◽

Jie Deng ◽

...

Keyword(s):

Titanium Dioxide ◽

Solar Cells ◽

Visible Light ◽

Dye Sensitized Solar Cells ◽

Light Response ◽

Dye Sensitized ◽

Visible Light Response ◽

Doped Titanium Dioxide ◽

Sensitized Solar Cells

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Dyes Amount and Light Scattering Influence on the Photocurrent Enhancement of Titanium Dioxide Hierarchically Structured Photoanodes for Dye-Sensitized Solar Cells

Coatings ◽

10.3390/coatings10010013 ◽

2019 ◽

Vol 10 (1) ◽

pp. 13 ◽

Cited By ~ 1

Author(s):

Wen-Yao Huang ◽

Tung-Li Hsieh

Keyword(s):

Titanium Dioxide ◽

Solar Cells ◽

Light Scattering ◽

Light Harvesting ◽

Short Circuit ◽

Dye Sensitized Solar Cells ◽

Strong Light ◽

Dye Sensitized ◽

Dye Loading ◽

Sensitized Solar Cells

In this study, we prepared and analyzed the properties of hill-like hierarchically structured titanium dioxide (TiO2) photoanodes for dye-sensitized solar cells (DSSCs). We expected that the presence of appropriately aggregated TiO2 clusters in the photoanode layer would translate to relatively strong light scattering and dye loading, increasing the photovoltaic efficiency. A detailed light-harvesting study was performed by employing polyvinyl alcohol (PVA) polymers of different molecular weights as binders for the aggregation of the TiO2 nanoparticles (P-25 Degussa). Hence, we obtained a series of TiO2 films, presenting a variety of morphologies. Their reflection, as well as absorbance of light by the attached dye, the amount of dye loading, and the performance of the fabricated DSSC devices were investigated. Our optimized device, with a relatively high dye loading and good light harvesting ability, was able to enhance the short-circuit current (Jsc) in the DSSCs by 23%.

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