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

Coatings ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 13 ◽  
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%.

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

2014 ◽  
Vol 16 (16) ◽  
pp. 7448-7454 ◽  
Author(s):  
P. S. Archana ◽  
Arunava Gupta ◽  
Mashitah M. Yusoff ◽  
Rajan Jose
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Photocurrent Density ◽  
Niobium Doping ◽  
Dye Sensitized ◽  
Dye Loading ◽  
Doped Titanium Dioxide ◽  
Sensitized Solar Cells

Tungsten doping in TiO2 nanowires led to increased photocurrent density resulting from increased lifetime and dye-loading compared to niobium doping.

Titanium Dioxide Nanotubes Decorated with Nanoparticles for Dye Sensitized Solar Cells

2011 ◽  
Vol 1303 ◽  
Author(s):  
Xuan Pan ◽  
Yong Zhao ◽  
Changhong Chen ◽  
Zhaoyang Fan
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
Conversion Efficiency ◽  
Electrochemical Impedance ◽  
Dye Sensitized Solar Cells ◽  
Photon Absorption ◽  
Device Performance ◽  
Dye Sensitized ◽  
Dye Loading ◽  
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.

TiO2 surface nanostructuring for improved dye loading and light scattering in double-layered screen-printed dye-sensitized solar cells

2015 ◽  
Vol 45 (8) ◽  
pp. 831-838 ◽  
Author(s):  
Mahsa Jalali ◽  
Roozbeh Siavash Moakhar ◽  
Ajay Kushwaha ◽  
Gregory Kia Liang Goh ◽  
Sayyed Khatiboleslam Sadrnezhaad ◽  
...  
Keyword(s):  
Solar Cells ◽  
Light Scattering ◽  
Dye Sensitized Solar Cells ◽  
Tio2 Surface ◽  
Surface Nanostructuring ◽  
Dye Sensitized ◽  
Dye Loading ◽  
Sensitized Solar Cells ◽  
Screen Printed

Preparation of YbF3-Ho@TiO2 core–shell sub-microcrystal spheres and their application to the electrode of dye-sensitized solar cells

2020 ◽  
Vol 44 (25) ◽  
pp. 10545-10553
Author(s):  
Jia Yu ◽  
Yulin Yang ◽  
Chuanxiang Zhang ◽  
Ruiqing Fan ◽  
Ting Su
Keyword(s):  
Solar Cells ◽  
Light Scattering ◽  
Charge Separation ◽  
Light Harvesting ◽  
Dye Sensitized Solar Cells ◽  
Recombination Process ◽  
Core Shell ◽  
Dye Sensitized ◽  
Nir Light ◽  
Sensitized Solar Cells

The TiO2/YbF3-Ho@TiO2 heterostructure with light-scattering and NIR-light harvesting characteristics can facilitate charge separation, suppress recombination process and prolong the lifetime of electrons.

Toward elevated light harvesting: efficient dye-sensitized solar cells with titanium dioxide/silica photoanodes

RSC Advances ◽  
2015 ◽  
Vol 5 (57) ◽  
pp. 46260-46266 ◽  
Author(s):  
Peizhi Yang ◽  
Qunwei Tang ◽  
Benlin He
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
Light Harvesting ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Light harvesting titanium dioxide/silica photoanodes are used for dye-sensitized solar cells.

Effect of Sintering Profiles on Titania Interparticle Connectivity, Electron Transport and Interfacial Resistance in Dye-Sensitized Solar Cells

2013 ◽  
Vol 771 ◽  
pp. 143-157
Author(s):  
Ajay K. Jena ◽  
Shyama Prasad Mohanty ◽  
Parag Bhargava
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Surface Area ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Slight Reduction ◽  
Dye Sensitized ◽  
Dye Loading ◽  
Higher Temperature ◽  
Sensitized Solar Cells

TiO2 films, which are often sintered at 450°C for 30 or 60 minutes for application in dye-sensitized solar cells (DSSCs), show no appreciable connectivity between the TiO2 particles. The present work deals with connectivity between TiO2 particles and its effect on electron diffusion and short circuit current density (Jsc) of DSSCs made from TiO2 films sintered at lower temperature for longer time (450°C, 550°C, 650°C for 60 minutes) and higher temperature for shorter time (450°C for 60 min followed by 700°C and 800°C for 10 and 20 minutes). TiO2 films sintered at higher temperature (700°C) but for shorter time (10 min) exhibited better connectivity between the particles with slight reduction in surface area. This caused faster transport of electron through the films sintered at 700°C/10 min than 450°C/60 min and 550°C/60 min and hence, resulted in highest Jsc (~ 7 mA/cm2). Films sintered at 650°C/60 min and 700°C/20 min showed better interparticle connectivity but had significantly lower surface area, dye loading and therefore, despite faster diffusion of electron in these films Jsc was measured to be lower. Sintering at 700°C/10 min following 450°C/60 min could be considered the best in terms of dye loading, electron transport and efficiency.

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