Cosensitization of metal-based dyes for high-performance dye-sensitized photovoltaics under ambient lighting conditions

Saeed, Muhammad; Kang, Hyeong Cheol; Yoo, Kicheon; Asiam, Francis Kwaku; Lee, Jae‐Joon; Shim, Jae Won

doi:10.1016/j.dyepig.2021.109624

Cited by 22 publications

(17 citation statements)

References 31 publications

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“…The use of the impedance method, which involves polarizing samples with an alternating voltage, allows very rapid results of the electrode response of the material under test. It is performed according to generally accepted procedures [32][33][34][35] at low voltage amplitude, in a wide range of frequencies and usually at equilibrium potential. The first step was to determine the equilibrium potential for each of the samples and then to record the impedance spectra in the frequency range of 100 kHz to 10 mHz, which were presented on the Nyquist and Bode diagrams.…”

Section: Resultsmentioning

confidence: 99%

Structure and Properties of TiO2/nanoTiO2 Bimodal Coatings Obtained by a Hybrid PVD/ALD Method on 316L Steel Substrate

et al. 2021

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This paper presents the synergy of the effect of two surface engineering technologies—magnetron sputtering (MS-PVD) and atomic layer deposition (ALD) on the structure and properties of 316L steel. Recent studies indicate that PVD coatings, despite their thickness of a few micrometers, have many discontinuities and structural defects, which may lead to pitting corrosion after time. Applying an ALD layer to a PVD coating seals its structure and contributes to extending the service life of the coating. Investigations of the structure and morphology of the produced layers were carried out using a scanning electron microscope (SEM) and atomic force microscope (AFM). In addition, the structure of the coatings was investigated on the cross-section using a scanning-transmission electron microscope S/TEM. The tribological properties of the materials studied were determined by the ball-on-disc method. The corrosion resistance of the tested materials was determined by the electrochemical potentiodynamic method by recording the polarization curves of the anodes. Additional information about the electrochemical properties of the tested samples, including the quality, their tightness, and their resistivity, was obtained by electrochemical impedance spectroscopy (EIS). In addition, the main mechanisms of corrosion and tribological wear were determined by SEM observations after corrosion tests and after tribological tests. The study showed that the fabrication of hybrid layers by MS-PVD and ALD techniques allows obtaining coatings with electrochemical properties superior to those of layers fabricated by only one method.

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Section: Resultsmentioning

confidence: 99%

Structure and Properties of TiO2/nanoTiO2 Bimodal Coatings Obtained by a Hybrid PVD/ALD Method on 316L Steel Substrate

et al. 2021

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“…Recent research in the field of photovoltaic source performance under artificial lighting is presented in the papers [27,28], which also analyze the suitability of different materials for such applications. Additionally, the paper [28] investigated the effect of dyes and different types of lighting like LED lighting.…”

Section: Discussionmentioning

confidence: 99%

The Efficiency of Obtaining Electricity and Heat from the Photovoltaic Module under Different Irradiance Conditions

Sarniak

2021

Energies

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This paper proposes a modification to the design of a standard PV module by enclosing the skeleton space and using forced ventilation. The purpose of this research was to develop a method for calculating the amount of heat gained during PV module cooling. A simplifying assumption was to omit the electrical energy consumed by the fans forcing the airflow. For testing at low irradiance, a prototype halogen radiation simulator of our own design was used, which is not a standardized radiation source used for testing PV modules. Two measurements were also made under natural, stable solar radiation. The modified PV module was tested for three ventilation rates and compared with the results obtained for the standard PV module. In all tested cases, an increase in electrical efficiency of about 2% was observed with increasing radiation intensity. The thermal efficiency decreased by about 5% in the analyzed cases and the highest value of 10.47% was obtained for the highest value of cooling airflow rate. In conclusion, the study results represent a certain compromise: an increase in electrical efficiency with a simultaneous decrease in thermal efficiency.

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“…The generation of current in the DSSC is a multi-stage process whose efficiency depends on the series resistance of all of the stages of electric charge transfer. The highest resistance limits the performance of the whole process [29,30]. The sheet resistance of the FTO layer is between 7 and 15 Ω/sq.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Electrolyte Flow Hydrodynamics on the Performance of a Microfluidic Dye-Sensitized Solar Cell

Szafran

Davykoza

2021

Applied Sciences

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The dye-sensitized solar cells microfluidically integrated with a redox flow battery (µDSSC-RFB) belong to a new emerging class of green energy sources with an inherent opportunity for energy storage. The successful engineering of microfluidically linked systems is, however, a challenging subject, as the hydrodynamics of electrolyte flow influences the electron and species transport in the system in several ways. In the article, we have analyzed the microflows hydrodynamics by means of the lattice-Boltzmann method, using the algebraic solution of the Navier-Stokes equation for a duct flow and experimentally by the micro particle image velocimetry method. Several prototypes of µDSSC were prepared and tested under different flow conditions. The efficiency of serpentine µDSSC raised from 2.8% for stationary conditions to 3.1% for electrolyte flow above 20 mL/h, while the fill factor increased about 13% and open-circuit voltage from an initial 0.715 V to 0.745 V. Although the hexagonal or circular configurations are the straightforward extensions of standard photo chambers of solar cells, those configurations are hydrodynamically less predictable and unfavorable due to large velocity gradients. The serpentine channel configuration with silver fingers would allow for the scaling of the µDSSC-RFB systems to the industrial scale without loss of performance. Furthermore, the deterioration of cell performance over time can be inhibited by the periodic sensitizer regeneration, which is the inherent advantage of µDSSC.

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Cosensitization of metal-based dyes for high-performance dye-sensitized photovoltaics under ambient lighting conditions

Cited by 22 publications

References 31 publications

Structure and Properties of TiO2/nanoTiO2 Bimodal Coatings Obtained by a Hybrid PVD/ALD Method on 316L Steel Substrate

Structure and Properties of TiO2/nanoTiO2 Bimodal Coatings Obtained by a Hybrid PVD/ALD Method on 316L Steel Substrate

The Efficiency of Obtaining Electricity and Heat from the Photovoltaic Module under Different Irradiance Conditions

The Influence of Electrolyte Flow Hydrodynamics on the Performance of a Microfluidic Dye-Sensitized Solar Cell

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