Self-assembled ultrathin titania nanosheets as blocking layers for significantly enhanced photocurrent and photovoltage of dye-sensitized solar cells

2015 ◽  
Vol 3 (33) ◽  
pp. 17042-17049 ◽  
Author(s):  
Lu Zhang ◽  
Hong Sun ◽  
Zhaosheng Xue ◽  
Bin Liu ◽  
Zhong-Sheng Wang
Keyword(s):  
Solar Cells ◽  
Single Crystal ◽  
Self Assembly ◽  
Dye Sensitized Solar Cells ◽  
Charge Recombination ◽  
Layer By Layer ◽  
Blocking Layer ◽  
Dye Sensitized ◽  
Conductive Substrate ◽  
Sensitized Solar Cells

To retard charge recombination efficiently in dye-sensitized solar cells (DSSCs), an ultrathin film of single-crystal titania nanosheets is pre-coated on a conductive substrate as a blocking layer through electrostatic layer-by-layer self-assembly.

Fabrication of porous TiO2 films using a spongy replica prepared by layer-by-layer self-assembly method: Application to dye-sensitized solar cells

2006 ◽  
Vol 499 (1-2) ◽  
pp. 396-401 ◽  
Author(s):  
Yosuke Tsuge ◽  
Kohei Inokuchi ◽  
Katsuhiro Onozuka ◽  
Ohno Shingo ◽  
Shinichiro Sugi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Self Assembly ◽  
Dye Sensitized Solar Cells ◽  
Layer By Layer ◽  
Tio2 Films ◽  
Porous Tio2 ◽  
Dye Sensitized ◽  
Assembly Method ◽  
Sensitized Solar Cells

Vanadium oxide as new charge recombination blocking layer for high efficiency dye-sensitized solar cells

Nano Energy ◽  
2015 ◽  
Vol 13 ◽  
pp. 368-375 ◽  
Author(s):  
Hytham Elbohy ◽  
Amit Thapa ◽  
Prashant Poudel ◽  
Nirmal Adhikary ◽  
Swaminathan Venkatesan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Vanadium Oxide ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Charge Recombination ◽  
Blocking Layer ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Role of Pristine and Acid-Functionalized Fullerene on Breaking Dye Aggregates and its Impact on the Efficiency of Solar Cells

2014 ◽  
Vol 67 (5) ◽  
pp. 819
Author(s):  
Syed Mujtaba Shah ◽  
Zafar Iqbal ◽  
Muzaffar Iqbal ◽  
Naila Shahzad ◽  
Amina Hana ◽  
...  
Keyword(s):  
Solar Cells ◽  
Zno Nanoparticles ◽  
Self Assembly ◽  
Zno Nanorods ◽  
Active Material ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Transmission Electron ◽  
Sensitized Solar Cells

Porphyrin dyes have an inherent tendency to aggregate. This leads to a self-quenching phenomenon that hinders electron transfer to the conduction band of semiconductors in dye-sensitized solar cells. Self-quenching adversely affects the efficiency of solar cells. Here, we report the interaction of porphyrin with pristine and acid-functionalized fullerene molecules on the surface of ZnO nanoparticles under chemisorbed conditions. Chemisorption of porphyrin only on ZnO nanoparticles instigates aggregation of the porphyrin molecules. These aggregates can be effectively broken by chemisorbing fullerene molecules on the surface of the ZnO nanoparticles. This is due to self-assembly formation processes because of porphyrin–fullerene interactions. The nanohybrid material, consisting of ZnO nanorods, acid-functionalized porphyrin, and fullerene derivatives, was characterized by UV–visible spectroscopy, fourier transform infrared spectroscopy, fluorescence spectroscopy, and transmission electron microscopy. The material generates better performing dye-sensitized solar cells when compared with those fabricated from porphyrin-based photo-active material.

A polymer and graphene layer to increase dye regeneration and suppress back electron transfer in dye sensitized solar cells

2017 ◽  
Vol 53 (49) ◽  
pp. 6629-6632 ◽  
Author(s):  
Vediappan Sudhakar ◽  
Arulraj Arulkashmir ◽  
Kothandam Krishnamoorthy
Keyword(s):  
Electron Transfer ◽  
Solar Cells ◽  
Graphene Layer ◽  
Dye Sensitized Solar Cells ◽  
Blocking Layer ◽  
Dye Sensitized ◽  
Back Electron Transfer ◽  
Dye Regeneration ◽  
Sensitized Solar Cells

A polymer–graphene blocking layer decreases back electron transfer and increases dye regeneration that improved the DSSC efficiency to 10.4%.

scholarly journals Acid Treatment of Titania Pastes to Create Scattering Layers in Dye-Sensitized Solar Cells

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Trystan Watson ◽  
Cecile Charbonneau ◽  
Daniel Bryant ◽  
David Worsley
Keyword(s):  
Solar Cells ◽  
Self Assembly ◽  
Dye Sensitized Solar Cells ◽  
Transparent Film ◽  
Similar Function ◽  
Short Term ◽  
Acid Pretreatment ◽  
Scattering Layer ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

In dye-sensitized solar cells (DSC) scattering layers are used to increase the path length of light incident on the TiO2film. This is typically achieved by the deposition of an additional TiO2layer on top of an existing transparent film and designed to trap light. In this work we show that a simple acid pretreatment can lead to the formation of a scattering “skin” on the surface of a single TiO2film performing a similar function to a scattering layer without any additional depositions. This is important in increasing manufacturing throughput for DSCs as further TiO2depositions require additional materials and heat treatment. The pretreatment leads to self-assembly of a scattering layer of TiO2which covers the surface on short-term immersion (<30 min) and penetrates the bulk layer upon longer immersion. The method has been shown to increase the efficiency of the device by 20%.

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