Adsorption and electronic states of morin on TiO2 nanoparticles

Zdyb, Agata; Krawczyk, Stanisław

doi:10.1016/j.chemphys.2014.08.009

Cited by 14 publications

(9 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The dye sensitizer is considered as a crucial component that strongly affects the performance of the working cell. The phenomenon which plays an important role in the performance of dye-sensitized solar cells is electron transfer from the excited state of the dye molecule to the conduction band of titanium dioxide nanoparticle [18][19][20]. The course of the light-induced transfer of electrons from the sensitizer to a semiconductor depends mainly on the type of the dye i.e.…”

Section: Introductionmentioning

confidence: 99%

The influence of the dye adsorption time on the DSSC performance

Krawczak

Zdyb

2019

E3S Web Conf.

Self Cite

View full text Add to dashboard Cite

Dye-sensitized solar cells (DSSC) of third generation photovoltaic technology, are nowadays one of the most investigated due to possibility to apply ecological and natural materials (dyes) such as alizarin. This paper reports the influence of electrode immersion time on alizarinbased dye-sensitized solar cells performance. The absorption spectra of alizarin dye were measured in the range of 300-800 nm. Fully structured dye-sensitized cells of working area equal to 0.8 cm 2 have been fabricated in the sandwich way using four different immersion times of the TiO2 electrodes: 10', 40', 1 h, 24 h. The high-performance EL-HPE electrolyte was instilled into the space between electrodes. Current-voltage (I-V) dark and illuminated characteristics have been measured using solar light simulator. Solar cells characterization was carried out under standard test conditions. The solar irradiance was set at 100 mW/cm 2 and temperature of the module was maintained at 25°C. Characteristic parameters of the fabricated cells were determined on the basis of measured I-V curves. Series resistances were extracted from I-V characteristics at an open circuit voltage using first order derivatives. It was found that 60 minutes of electrode immersion in dye solution is sufficient to obtain appropriate stage of the dye adsorption.

show abstract

Section: Introductionmentioning

confidence: 99%

The influence of the dye adsorption time on the DSSC performance

Krawczak

Zdyb

2019

E3S Web Conf.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Besides, Karlsson and coworkers [ 13 ] synthesized and tested a series of metal-free organic dyes with a core phenoxazine chromophore as sensitizers in DSSCs, and the results indicated that a dye with a furan-conjugated linker showed a shorter lifetime relative to dyes with the acceptor group directly attached to the phenoxazine. In addition, natural dyes such as chlorophylls [ 17 , 18 , 19 ], flavonoids [ 20 , 21 ], anthocyanins [ 22 , 23 ], and carotenoids [ 24 , 25 ] have also been applied to the research and development of DSSC owing to their environmental friendliness, relative abundance, easy preparation, and large absorption coefficients’ invisible region [ 26 , 27 ]. Kumara et al [ 28 ] reported the research of black tea waste extract (BTE) as a potential sensitizer, and the DSSC sensitized with pigment complexes of BTE showed a PCE of 0.20%, while a significant increase (η = 0.46%) was observed when the pH of the pigment solution was lowered.…”

Section: Introductionmentioning

confidence: 99%

An Experimental and Theoretical Investigation of the Electronic Structures and Photoelectrical Properties of Ethyl Red and Carminic Acid for DSSC Application

Sun

Song

et al. 2016

Materials

View full text Add to dashboard Cite

The photoelectrical properties of two dyes—ethyl red and carminic acid—as sensitizers of dye-sensitized solar cells were investigated in experiments herein described. In order to reveal the reason for the difference between the photoelectrical properties of the two dyes, the ground state and excited state properties of the dyes before and after adsorbed on TiO2 were calculated via density functional theory (DFT) and time-dependent DFT (TDDFT). The key parameters including the light harvesting efficiency (LHE), the driving force of electron injection (ΔGinject) and dye regeneration (ΔGregen), the total dipole moment (μnormal), the conduction band of edge of the semiconductor (ΔECB), and the excited state lifetime (τ) were investigated, which are closely related to the short-circuit current density (Jsc) and open circuit voltage (Voc). It was found that the experimental carminic acid has a larger Jsc and Voc, which are interpreted by a larger amount of dye adsorbed on a TiO2 photoanode and a larger ΔGregen, excited state lifetime (τ), μnormal, and ΔECB. At the same time, chemical reactivity parameters illustrate that the lower chemical hardness (h) and higher electron accepting power (ω+) of carminic acid have an influence on the short-circuit current density. Therefore, carminic acid shows excellent photoelectric conversion efficiency in comparison with ethyl red.

show abstract

“…This kind of dyes occurring in higher plants are flavonoids belonging to polyphenol group of compounds and well known for their antioxidant and anti-inflammatory properties. Our previous results have shown a substantial shift of the absorption spectra of morin and quercetin, adsorbed on TiO 2 nanoparticles, from the near UV by ∼5500 and 6500 cm -1 (0.68 and 0.81 eV) for morin and quercetin, respectively, into the blue-green region of the spectrum [15,16]. These observations, together with Stark effect spectroscopy data, point to the strong interaction of adsorbed dye with surface titanium atoms, which may contribute to an effective electron transfer in flavonoid-based DSSC.…”

Section: Introductionmentioning

confidence: 90%

“…We investigated the adsorption of flavonoids on colloidal TiO 2 nanoparticles and on commercially available, ready-to-use TiO 2 electrodes. The detailed results for morin and quercetin may be found in previously published work [15,16]; here we concentrate mainly on the interaction of fisetin and luteolin with TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Natural Flavonoids as Potential Photosensitizers for Dye-Sensitized Solar Cells

Zdyb

Krawczyk

2019

Ecological Chemistry and Engineering S

Self Cite

View full text Add to dashboard Cite

Natural flavonoids quercetin, morin, fisetin and luteolin were studied as potential photosensitizers for dye-sensitized solar cells (DSSC). Spectroscopic methods were used to investigate the formation of dye/TiO2 nanoparticles assemblies and the development of their absorption spectra. The results show that the flavonoids adsorb well on TiO2 nanoparticles and this process causes the shift of absorption spectra from the near UV into the visible range of solar light. The mode of binding of the dye molecules on TiO2 surface is analyzed by comparison of spectral absorption properties and with the use of structural differences introduced by fisetin and luteolin for discrimination between several possibilities.

show abstract

Adsorption and electronic states of morin on TiO2 nanoparticles

Cited by 14 publications

References 44 publications

The influence of the dye adsorption time on the DSSC performance

The influence of the dye adsorption time on the DSSC performance

An Experimental and Theoretical Investigation of the Electronic Structures and Photoelectrical Properties of Ethyl Red and Carminic Acid for DSSC Application

Natural Flavonoids as Potential Photosensitizers for Dye-Sensitized Solar Cells

Contact Info

Product

Resources

About