scholarly journals PREPARED QUANTUM DOTS SENSITIZED SOLAR CELLS BASED ON TiO2/CdS:Mn2+/CdSe PHOTOANODE

2018 ◽  
Vol 34 (3) ◽  
Author(s):  
Ha Thanh Tung
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Solar Cells ◽  
Doping Concentration ◽  
Light Harvesting ◽  
Sensitized Solar Cells

In this study, we have prepared and investigated the optical properties of the TiO2/CdS:Mn2+/CdSe photoanode as the function of Mn2+ doping concentration and thickness. The results show that the peaks of the UV-Vis spectra shifted toward longer wavelength while Mn2+ doping concentrations or thickness of the films were changed. The main cause of the red-shifting in UV-Vis spectra may come from the increasing of photoanode light-harvesting capacity. In addition, the results also demonstrated by the boosting performance of quantum dots sensitized solar cells from 2.07% for TiO2/CdS/CdSe photoanode to 2.5% for TiO2/CdS:Mn2+/CdSe photoanode.

scholarly journals Photoacoustic Study of CdS QDs for Application in Quantum-Dot-Sensitized Solar Cells

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
S. Abdallah ◽  
N. Al-Hosiny ◽  
Ali Badawi
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Solar Cells ◽  
Current Density ◽  
Cds Quantum Dots ◽  
Counter Electrodes ◽  
Redox Species ◽  
Cds Qds ◽  
Photovoltaic Characterization ◽  
Sensitized Solar Cells

The optical properties and photovoltaic characterization of CdS quantum dots sensitized solar cells (QDSSCs) were studied. CdS QDs were prepared by the chemical solution deposition (CD) technique. Photoacoustic spectroscopy (PA) was employed to study the optical properties of the prepared samples. The sizes of the CdS QDs were estimated from transmission electron microscope (TEM) micrographs gives radii ranged from 1.57 to 1.92 nm. The current density-voltage (J-V) characteristic curves of the assembled QDSSCs were measured. Fluorine doped Tin Oxide (FTO) substrates were coated with 20 nm-diameter TiO2nanoparticles (NPs). Presynthesized colloidal CdS quantum dots of different particles size were deposited on the TiO2-coated substrates using direct adsorption (DA) method. The FTO counter electrodes were coated with platinum, while the electroelectrolyte containingI-/I-3redox species was sandwiched between the two electrodes. The short current density (Jsc) and efficiency (η) increases as the particle size increases. The values ofJscincreases linearly with increasing the intensities of the sun light which indicates the greater sensitivity of the assembled cells.

Cyclometalated Ru(ii) complexes with tunable redox and optical properties for dye-sensitized solar cells

2020 ◽  
Vol 49 (46) ◽  
pp. 16935-16945
Author(s):  
Maria A. Lavrova ◽  
Sergey A. Mishurinskiy ◽  
Daniil E. Smirnov ◽  
Paulina Kalle ◽  
Ekaterina V. Krivogina ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Cells ◽  
Light Harvesting ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Cyclometalated Ru(ii) complexes with 2-arylbenzimidazoles demonstrate enhanced light-harvesting properties and good characteristics in dye-sensitized solar cells.

Titanium mesh based fully flexible highly efficient quantum dots sensitized solar cells

2017 ◽  
Vol 5 (11) ◽  
pp. 5577-5584 ◽  
Author(s):  
Zhonglin Du ◽  
Mingdian Liu ◽  
Yan Li ◽  
Yanxue Chen ◽  
Xinhua Zhong
Keyword(s):  
Quantum Dots ◽  
Catalytic Activity ◽  
Solar Cells ◽  
Light Harvesting ◽  
Titanium Mesh ◽  
Highly Efficient ◽  
Sensitized Solar Cells ◽  
Ti Mesh

Benefiting from the in situ growth of ZnO/ZnSe/CdSe heterojunction photoanodes with effective light harvesting capacity and the highly catalytic activity of MC/Ti CEs, flexible Ti mesh-based QDSCs were assembled successfully and exhibited a new efficiency record for flexible QDSCs with champion PCE of 5.08%.

Effect of Al3+ doping concentration and film thickness of ZnO nanoparticles over the TiO2 photoelectrode in CdS quantum dots sensitized solar cells

Solar Energy ◽  
2020 ◽  
Vol 197 ◽  
pp. 154-162 ◽  
Author(s):  
H.E. Sanchez ◽  
D. Esparza ◽  
T. Lopez-Luke ◽  
J. Castañeda-Contreras ◽  
V.F. Marañon-Ruiz ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Film Thickness ◽  
Zno Nanoparticles ◽  
Doping Concentration ◽  
Cds Quantum Dots ◽  
Sensitized Solar Cells ◽  
Tio2 Photoelectrode

Engineering of Ru(ii) dyes for interfacial and light-harvesting optimization

2014 ◽  
Vol 43 (7) ◽  
pp. 2726-2732 ◽  
Author(s):  
Maria Grazia Lobello ◽  
Kuan-Lin Wu ◽  
Marri Anil Reddy ◽  
Gabriele Marotta ◽  
Michael Grätzel ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Cells ◽  
Light Harvesting ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitizer ◽  
Dye Sensitized ◽  
Bipyridine Ligand ◽  
Ruthenium Dye ◽  
Sensitized Solar Cells

A new ruthenium dye sensitizer based on a dissymmetric bipyridine ligand has been synthesized and employed in dye-sensitized solar cells for enhanced interfacial and optical properties.

scholarly journals TiO2 Passivation Layer on ZnO Hollow Microspheres for Quantum Dots Sensitized Solar Cells with Improved Light Harvesting and Electron Collection

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 631 ◽  
Author(s):  
Zhen Li ◽  
Libo Yu ◽  
Hao Wang ◽  
Huiwen Yang ◽  
Huan Ma
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Light Harvesting ◽  
Photovoltaic Performance ◽  
Hollow Microsphere ◽  
Hollow Microspheres ◽  
Passivation Layer ◽  
Electron Recombination ◽  
Electron Collection ◽  
Sensitized Solar Cells

Light harvesting and electron recombination are essential factors that influence photovoltaic performance of quantum dots sensitized solar cells (QDSSCs). ZnO hollow microspheres (HMS) as architectures in QDSSCs are beneficial in improving light scattering, facilitating the enhancement of light harvesting efficiency. However, this advantage is greatly weakened by defects located at the surface of ZnO HMS. Therefore, we prepared a composite hollow microsphere structure consisting of ZnO HMS coated by TiO2 layer that is obtained by immersing ZnO HMS architectures in TiCl4 aqueous solution. This TiO2-passivated ZnO HMS architecture is designed to yield good light harvesting, reduced charge recombination, and longer electron lifetime. As a result, the power conversion efficiency (PCE) of QDSSC reaches to 3.16% with an optimal thickness of TiO2 passivation layer, which is much higher when compared to 1.54% for QDSSC based on bare ZnO HMS.

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