scholarly journals Enhancing the Performance of Dye Sensitized Solar Cells Using Silver Nanoparticles Modified Photoanode

Molecules ◽  
2020 ◽  
Vol 25 (17) ◽  
pp. 4021
Author(s):  
Faizah Saadmim ◽  
Taseen Forhad ◽  
Ahmed Sikder ◽  
William Ghann ◽  
Meser M. Ali ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Silver Nanoparticles ◽  
Solar Cells ◽  
Electrochemical Impedance ◽  
Dye Sensitized Solar Cells ◽  
Control Group ◽  
Dye Sensitized ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Infrared And Raman Spectroscopy

In this study, silver nanoparticles were synthesized, characterized, and applied to a dye-sensitized solar cell (DSSC) to enhance the efficiency of solar cells. The synthesized silver nanoparticles were characterized with UV–Vis spectroscopy, dynamic light scattering, transmission electron microscopy, and field emission scanning electron microscopy. The silver nanoparticles infused titanium dioxide film was also characterized by Fourier transform infrared and Raman spectroscopy. The performance of DSSC fabricated with silver nanoparticle-modified photoanode was compared with that of a control group. The current and voltage characteristics of the devices as well as the electrochemical impedance measurements were also carried out to assess the performance of the fabricated solar cells. The solar-to-electric efficiency of silver nanoparticles based DSSC was 1.76%, which is quite remarkable compared to the 0.98% realized for DSSC fabricated without silver nanoparticles.

scholarly journals Development of Well-Aligned TiO2Nanotube Arrays to Improve Electron Transport in Dye-Sensitized Solar Cells

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Kyung-Ho Chung ◽  
Md. Mahbubur Rahman ◽  
Hyun-Seok Son ◽  
Jae-Joon Lee
Keyword(s):  
Solar Cells ◽  
Electrochemical Impedance ◽  
Transparent Conducting Oxide ◽  
Dye Sensitized Solar Cells ◽  
X Ray Diffraction ◽  
One Dimensional ◽  
Dye Sensitized ◽  
Transmission Electron ◽  
Back Electron Transfer ◽  
Sensitized Solar Cells

We fabricated well-aligned one-dimensional (1-D) titania nanotubes (TNT) on transparent conducting oxide (TCO) by anodization of Ti foil. Different lengths of TNTs were prepared by varying the applied potential (70 V) time, and we investigated the performance of these TNTs in dye-sensitized solar cells (DSSCs), transplanted onto a 6 μm TNP adhesion layer. The fabricated TNTs arrays (length 15 μm) photoelectrode showed 24% increased efficiency compared to the TNP photoelectrode of 17 μm thickness. We further investigated the performances of DSSCs for the TNTs (1 wt%) incorporated TNP photoelectrode and obtained 22% increased efficiency. The increased efficiency of the pure TNTs arrays and TNT-mixed TNP photoelectrodes was attributed to the directional electron movement of TNTs and light scattering effect of the TNT with the decreased rate of back electron transfer. The anodized and fabricated TNTs and DSSCs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), and electrochemical impedance spectroscopy (EIS).

scholarly journals Alignment ofTiO2(Anatase) Crystal of Dye-Sensitized Solar Cells by External Magnetic Field

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Na-Yeong Hong ◽  
Hyunwoong Seo ◽  
Min-Kyu Son ◽  
Soo-Kyoung Kim ◽  
Song-Yi Park ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electron Microscopy ◽  
Electrochemical Impedance ◽  
Dye Sensitized Solar Cells ◽  
Energy Conversion Efficiency ◽  
X Ray Diffraction ◽  
Solar Simulator ◽  
Dye Sensitized ◽  
Transmission Electron ◽  
The Magnetic Field

In this study, magnetic field (B) was applied on TiO2(anatase) of dye-sensitized solar cell (DSC) for alignment of crystal. Magnetic field was applied on TiO2when deposited TiO2on the fluorine tin oxide (FTO) was dried at 373 K for crystalline orientation. And applying time ofBwas varied 0~25 min. Characteristics of the magnetic field applied TiO2films were analyzed by X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). Current-voltage characteristics were also analyzed using solar simulator, and it was confirmed that the energy conversion efficiency of 41% was increased. Finally, it was identified that the magnetic field affected orientation of TiO2, resulting in the enhancement of the performance of the DSC.

ZnO/TiO2 composite photoanodes for efficient dye-sensitized solar cells

2014 ◽  
Vol 07 (04) ◽  
pp. 1450039 ◽  
Author(s):  
Liqing Zhang ◽  
Shuai Zhou ◽  
Fengshi Cai ◽  
Zhihao Yuan
Keyword(s):  
Electron Microscopy ◽  
Solar Cells ◽  
Conversion Efficiency ◽  
Electrochemical Impedance ◽  
Hydrothermal Process ◽  
Dye Sensitized Solar Cells ◽  
Open Circuit ◽  
Growth Time ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

ZnO / TiO 2 composite films composed of a ZnO nanoflowers overlayer and a ZnO / TiO 2 composite particulate underlayer were fabricated by a simple hydrothermal process. The as-prepared films were characterized by scanning electron microscopy, transmission electron microscopy (TEM) and diffused reflectance spectroscopy. The performance of dye-sensitized solar cells (DSCs) was investigated by photocurrent–voltage measurements, incident photon-to-current conversion efficiency (IPCE) and electrochemical impedance spectroscopy. It was found that the ZnO / TiO 2 composite film prepared with a 60 min growth time exhibited higher reflectivity than that of pure TiO 2 film due to the effective light-scattering of ZnO nanoflowers, resulting in increased J sc . In the meantime, the open-circuit potential of the device were enhanced from 698 to 826 mV due to the formation of an energy barrier by ZnO at TiO 2/electrolyte interface, resulting in a 52% improvement in the power conversion efficiency from 4.64 to 7.06%.

Graphene-wrapped CuInS2 composites for efficient dye-sensitized solar cells

2015 ◽  
Vol 08 (01) ◽  
pp. 1550011 ◽  
Author(s):  
Lei Zhou ◽  
Juan Luo ◽  
Xiao Yang ◽  
Bo Yang ◽  
Xueqin Zuo ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Solar Cells ◽  
Counter Electrode ◽  
Power Conversion ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Transmission Electron ◽  
Hydrothermal Approach ◽  
Sensitized Solar Cells ◽  
Scanning Electron

Graphene-wrapped CuInS 2 composites were synthesized via a facile hydrothermal approach. The as-synthesized products were characterized by scanning electron microscope and transmission electron microscopy and the reduction of GO were confirmed by Raman spectroscopy. Graphene-wrapped CuInS 2 composites exhibit excellent electrocatalytic activity for the triiodide reduction due to the improved conductivity and the synergetic catalysis of CuInS 2 and graphene. The graphene-wrapped CuInS 2 composites were exploited as counter electrode for dye-sensitized solar cells and therefore achieved a power conversion efficiency of 6.4%, which is comparable to that of Pt CE (6.9%).

scholarly journals Mesoporous TiO2 spheres as a photoanodic material in dye-sensitized solar cells

2018 ◽  
Vol 12 (4) ◽  
pp. 374-382 ◽  
Author(s):  
Nikola Tasic ◽  
Zorica Marinkovic-Stanojevic ◽  
Zorica Brankovic ◽  
Milan Zunic ◽  
Uros Lacnjevac ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Solar Cells ◽  
Electrochemical Impedance ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Visible Region ◽  
Mesoporous Tio2 ◽  
Dye Sensitized ◽  
Bet Analysis ◽  
Sensitized Solar Cells

Mesoporous TiO2 films with spherical architectures and promising performance in dye-sensitized solar cells (DSSCs) were prepared. The morphology of the films was investigated by scanning electron microscopy. Transmission electron microscopy analysis of the spheres disclosed the elongated shape of sub-20 nm primary particles, while BET analysis revealed their high surface area of 135m2/g. Anatase presence was observed in the films based on X-ray diffractometry, selected-area electron diffraction analysis and Raman spectroscopy analyses. Increased light scattering of the spheres in visible region was observed by UV-VIS-NIR spectroscopy. Photovoltaic performance of the operating N719-sensitized cells was tested using electrochemical impedance spectroscopy and current density-voltage (J-V) curves under simulated AM1.5 spectrum. The 0.25 cm2 cells exhibited photo-to-electric power efficiency of 4.9%, which is among noteworthy values for DSSCs with similar photoanodic structures.

scholarly journals Impact of TiO2 Nanostructures on Dye-Sensitized Solar Cells Performance

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1633
Author(s):  
Paweł Gnida ◽  
Paweł Jarka ◽  
Pavel Chulkin ◽  
Aleksandra Drygała ◽  
Marcin Libera ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electrochemical Impedance ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Atomic Force ◽  
Vis Spectroscopy ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
Sensitized Solar Cells ◽  
Tio2 Nanostructures

The effect of TiO2 nanostructures such as nanoparticles, nanowires, nanotubes on photoanode properties, and dye-sensitized solar cells photovoltaic parameters were studied. The series of dye-sensitized solar cells based on two dyes, that is, commercially N719 and synthesized 3,7′-bis(2-cyano-1-acrylic acid)-10-ethyl-phenothiazine were tested. Additionally, the devices containing a mixture of this sensitizer and chenodeoxycholic acid as co-adsorbent were fabricated. The amount of adsorbed dye molecules to TiO2 was evaluated. The prepared photoanodes with different TiO2 nanostructures were investigated using UV-Vis spectroscopy, optical, atomic force, and scanning electron microscopes. Photovoltaic response of constructed devices was examined based on current-voltage characteristics and electrochemical impedance spectroscopy measurements. It was found that the highest UV-Vis absorption exhibited the photoanode with nanotubes addition. This indicates the highest number of sensitizer molecules anchored to the titanium dioxide photoanode, which was subsequently confirmed by dye-loading tests. The highest power conversion efficiency was (6.97%) for solar cell containing nanotubes and a mixture of the dyes with a co-adsorbent.

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.

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