Aminonaphthoquinones as photosensitizers for mesoporous ZnO based dye-sensitized solar cells

Mahadik, Sharad A.; Pathan, Habib M.; Salunke‐Gawali, Sunita; Butcher, Ray J.

doi:10.1016/j.jallcom.2020.156279

Cited by 15 publications

(7 citation statements)

References 47 publications

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“…2-bromo-3-propylamino-1,4-naphthoquinone and 2-bromo-3-butylamino-1,4-naphthoquinone, and mesoporous ZnO photoelectrodes were shown to have an impressive startup PCE of 0.13 and 0.20%, respectively. 37 As reported in the literature, the modifications of photoanode in terms of morphology, doping, and film thickness have significant influences on the PV performance of DSSCs. 38 On the one hand, the photosensitive dyes provide photoelectrons; on the other hand, the bulk of semiconductor materials is only used as a charge transporter.…”

Section: Introductionmentioning

confidence: 95%

“…DSSCs fabricated using aminonaphthoquinone-based photosensitizers, viz. 2-bromo-3-propylamino-1,4-naphthoquinone and 2-bromo-3-butylamino-1,4-naphthoquinone, and mesoporous ZnO photoelectrodes were shown to have an impressive startup PCE of 0.13 and 0.20%, respectively . As reported in the literature, the modifications of photoanode in terms of morphology, doping, and film thickness have significant influences on the PV performance of DSSCs .…”

Section: Introductionmentioning

confidence: 99%

“…On the one hand, the photosensitive dyes provide photoelectrons; on the other hand, the bulk of semiconductor materials is only used as a charge transporter . However, due to their nanorod structures, even though the TiO 2 nanorod-based electrodes exhibit effective charge transport pathways for the photogenerated electrons in DSSCs, the dye loading in the ZnO-based powder was higher in our previous work due to the nanograin structures, which gave sufficient surface area for light harvesting. However, to improve the dye loading and light absorption, in the near future, we will modify the surface of TiO 2 NR-based photoanode materials, particularly by loading the TiO 2 grains on TiO 2 nanorods to improve the dye loading and light absorption simultaneously.…”

Section: Introductionmentioning

confidence: 99%

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Titania Nanorods Embedded with 2-Bromo-3-(methylamino)naphthalene-1,4-dione for Dye-Sensitized Solar Cells

et al. 2022

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In a recent study, TiO 2 nanorod electrodes were prepared by the hydrothermal approach followed by calcination at various temperatures from 300 to 600 °C. The effects of calcination temperature on the morphological and structural properties were investigated. The novel analogue of aminonaphthoquinone(2R-(nalkylamino)-1,4-naphthoquinone) photosensitizer, viz. BrA1, 2bromo-3-(methylamino)naphthalene-1,4-dione was synthesized from 2,3-dibromonaphthalene-1,4-dione. X-ray crystallographic data collection and refinement confirm that BrA1 crystallizes in the triclinic space group P1̅ . After loading BrA1, the photosensitizer on the annealed TiO 2 nanorod (TiO 2 NR) electrodes, the optical properties of the photoanodes showed broadbands in each of the UV and visible regions, which are attributed to the π →π* and n → π* charge-transfer transitions, respectively. The dye-sensitized solar cell (DSSC) system was formed by loading the BrA1 photosensitizer on TiO 2 NR. The electrochemical impedance spectroscopy (EIS) analyses confirm that calcination temperature improves the charge transportation by lowering the resistance path during the photovoltaic process in TiO 2 NR (400 °C) photoanode-based DSSCs due to the sufficient photosensitizer adsorption and fast electron injection. Due to the effective light harvesting by the BrA1 photosensitizer and charge transport through the TiO 2 nanorod, the power conversion efficiencies (PCE) of the TiO 2 NR (400 °C/BrA1-based) DSSCs were improved for 2-bromo-3-(methylamino)naphthalene-1,4-dione.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Titania Nanorods Embedded with 2-Bromo-3-(methylamino)naphthalene-1,4-dione for Dye-Sensitized Solar Cells

et al. 2022

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“…Chenab et al 33 have used a 2-hydroxy-3-[phenyl(phenylamino)methyl]naphthalene-1,4-dione (4a) sensitizer in DSSC applications and observed acceptable photovoltaic performance. Mahadik et al 34 reported that aminonaphthoquinone dye as a photosensitizer with ZnO photoanode enhances photovoltaic parameters due to decreased charge transport resistance.…”

Section: Introductionmentioning

confidence: 99%

Naphthoquinoneoxime-Sensitized Titanium Dioxide Photoanodes: Photoelectrochemical Properties

et al. 2022

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Naphthoquinoneoxime derivatives, viz., LwOx, 3-hydroxy-4-(hydroxyimino)naphthalen-1 (4H)-one; PthOx, 3-hydroxy-4-(hydroxyimino)-2-methylnaphthalen-1(4H)-one; and Cl_LwOx, 2-chloro-3-hydroxy-4-(hydroxyimino)naphthalen-1(4H)-one, are used in fabrication of dye-sensitized solar cells (DSSCs). The photophysical and electrochemical properties of the sensitizers were studied. The HOMO–LUMO energy gaps of the sensitizers (LwOx, PthOx, and Cl_LwOx) calculated by using the intersection of UV–visible and fluorescence spectra are 2.85, 2.71, and 2.87 eV, respectively. The energy band alignment energy level of the sensitizer, that is, the lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO), should match with the energy level of the TiO2 conduction band and the redox potential of iodine/triiodide electrolyte to allow smooth electron transfer. The electrochemical characterization of sensitizers was done to find the LUMO and HOMO level of the sensitizer. It shows that the LUMO level of (LwOx, PthOx, and Cl_LwOx) is above the conduction band position of TiO2. Electrochemical impedance spectroscopy was used to study the charge transport resistance and electron lifetime of DSSCs. The charge transport resistance at the TiO2 |electrolyte|counter electrode interface was reduced in the Cl_LwOx device; thus, the electron lifetime of Cl_LwOx was enhanced compared to LwOx and PthOx sensitizers. The fabricated device was characterized using photocurrent density–voltage (J–V) measurement. It is observed that there was an enhancement in the overall power conversion efficiency (η) of the DSSCs fabricated by using Cl_LwOx sensitizers as compared to LwOx and PthOx sensitizer-loaded photoanodes. Enhancement in power conversion efficiency, that is, photovoltage and photocurrent, is achieved due to the chlorine substituent. Thus, the chlorine substituent naphthoquinoneoxime pushes the electron density, enhancing the pushing nature and facilitating the lone pair present in the N–OH moiety to attach to TiO2 more strongly.

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“…Thus, there are many scientific papers focused on changing the original materials used by Grätzel ( Figure 1 a) or modifying them. The mesoporous titanium(IV) oxide layer used originally as a photoanode was exchanged by zinc oxide [ 7 , 8 ] and nickel(II) oxide [ 9 ] nanoparticles or doped with tungsten [ 10 ], sulfur [ 11 ] or copper [ 12 ]. Platinum nanoparticles forming the counter electrode were successfully replaced [ 13 ] by e.g., carbon [ 14 ], tungsten disulfide [ 15 ], or molybdenum oxide [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Efficiency Boost in Dye-Sensitized Solar Cells by Post- Annealing UV-Ozone Treatment of TiO2 Mesoporous Layer

et al. 2021

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The organic residues on titanium(IV) oxide may be a significant factor that decreases the efficiency of dye-sensitized solar cells (DSSC). Here, we suggest the UV-ozone cleaning process to remove impurities from the surface of TiO2 nanoparticles before dye-sensitizing. Data obtained from scanning electron microscopy, Kelvin probe, Fourier-transform infrared spectroscopy, and Raman spectroscopy showed that the amounts of organic contamination were successfully reduced. Additionally, the UV-VIS spectrophotometry, spectrofluorometry, and secondary ion mass spectrometry proved that after ozonization, the dyeing process was relevantly enhanced. Due to the removal of organics, the power conversion efficiency (PCE) of the prepared DSSC devices was boosted from 4.59% to 5.89%, which was mostly caused by the increment of short circuit current (Jsc) and slight improvement of the open circuit voltage (Voc).

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Aminonaphthoquinones as photosensitizers for mesoporous ZnO based dye-sensitized solar cells

Cited by 15 publications

References 47 publications

Titania Nanorods Embedded with 2-Bromo-3-(methylamino)naphthalene-1,4-dione for Dye-Sensitized Solar Cells

Titania Nanorods Embedded with 2-Bromo-3-(methylamino)naphthalene-1,4-dione for Dye-Sensitized Solar Cells

Naphthoquinoneoxime-Sensitized Titanium Dioxide Photoanodes: Photoelectrochemical Properties

Efficiency Boost in Dye-Sensitized Solar Cells by Post- Annealing UV-Ozone Treatment of TiO2 Mesoporous Layer

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