scholarly journals Neutral copper(i) dipyrrin complexes and their use as sensitizers in dye-sensitized solar cells

2014 ◽  
Vol 43 (10) ◽  
pp. 4127-4136 ◽  
Author(s):  
Tracy E. Hewat ◽  
Lesley J. Yellowlees ◽  
Neil Robertson
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Visible Absorption ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

[Cu(i)(dipyrrin)(bipy)] complexes have been prepared and show intense visible absorption leading to function as sensitizing dyes in solar cells.

Influence of Electron Injection Rate in Triphenylamine Based Dye for Dye-Sensitized Solar Cells: A First Principle Study

2019 ◽  
Vol 233 (9) ◽  
pp. 1247-1259
Author(s):  
Madhu Prakasam
Keyword(s):  
Solar Cells ◽  
Absorption Spectra ◽  
Density Functional ◽  
Dye Sensitized Solar Cells ◽  
Visible Region ◽  
Electron Injection ◽  
Injection Rate ◽  
Visible Absorption ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Abstract In this work, we systematically investigate the impacts of electron-donor based on Triphenylamine (TPA). The Geometry structure, energy levels, light-harvesting ability and ultraviolet-visible absorption spectra were calculated by using Density Functional Theory (DFT) and Time-Dependent-DFT. The electron injection rate of the TPA-N(CH3)2 based dyes has 0.71 eV for high among the dye sensitizer. The First and Second order Hyperpolarizability of the 11.95 × 10−30 e.s.u and 12195.54 a.u, respectively for TPA-N(CH3)2 based dye. The calculated absorption spectra were showed in the ultra-violet visible region for power conversion region. The study reveals that the electron transfer character of TPA-N(CH3)2 based dyes can be made suitable for applications in Dye-Sensitized Solar Cells.

Novel Ball-Type Dioxy-O-carborane Bridged Cobaltphthalocyanine: Synthesis, DFT Studies and Characterization for Dye-Sensitized Solar Cells as Photosensitizers

2018 ◽  
Author(s):  
Sevil ŞENER
Keyword(s):  
Solar Cells ◽  
Density Functional ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Performance Parameters ◽  
Visible Absorption ◽  
Dye Sensitized ◽  
Sensitization Time ◽  
Sensitized Solar Cells

The synthesis and spectroscopic characterization of an innovative ball-type cobalt (II)  metallophthalocyanine 4, bridged by four 1,2-bis(2-hydroxymethyl)-O-carborane (HMOC) 1 units has been achieved. The structure of 4 was characterized via elemental analysis, UV–visible absorption spectroscopy, FT-IR spectroscopy, and MALDI-TOF mass spectrometry. The photovoltaic performance of the newly synthesized compound in dye-sensitized solar cells was investigated. In order to clarify the effect of dye-sensitization time on photovoltaic performance parameters, the sensitization time was varied from 12 to 60 h and the performance parameters were investigated. It was found that sensitization time had a strong effect on the main performance parameters. The best photovoltaic performance was achieved after sensitization for 36 h (short circuit current density, 6.41 mA cm−2; overall conversion efficiency, 3.42%). Geometry optimization of the molecule was performed using density functional theory and shows a peripheral structure.

scholarly journals New 1,3,4-Oxadiazole Based Photosensitizers for Dye Sensitized Solar Cells (DSSCs)

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Umer Mehmood ◽  
Ibnelwaleed A. Hussein ◽  
Muhammad Daud
Keyword(s):  
Solar Cells ◽  
Density Functional ◽  
Electrochemical Impedance ◽  
Dye Sensitized Solar Cells ◽  
High Electron ◽  
Conjugation System ◽  
Native Form ◽  
Visible Absorption ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

1,3,4-Oxadiazole based photosensitizers with biphenyl, naphthalene, anthracene, and triphenylamine as the electron-donating moiety were synthesized for solar cell applications. In these photosensitizers, cyano groups were introduced as the electron acceptor and the anchor group because of their high electron-withdrawing ability and strong bonding to the semiconductor. Oxadiazole isomers were used as theπ-conjugation system, which bridges the donor-acceptor systems. The electrochemical and optical properties of the sensitizers were investigated both in their native form and upon incorporation into dye sensitized solar cells. The results of UV-visible absorption spectroscopy, electrochemical impedance spectroscopic measurements, and photocurrent voltage characteristics indicate that 1,3,4-oxadiazole pi-spacer with the anthracene moiety has the highest efficiency of 2.58%. Density functional theory was employed to optimize the structures of the sensitizers and the TiO2cluster.

scholarly journals Theoretical Study of theπ-Bridge Influence with Different Units of Thiophene and Thiazole in Coumarin Dye-Sensitized Solar Cells

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Rody Soto-Rojo ◽  
Jesús Baldenebro-López ◽  
Daniel Glossman-Mitnik
Keyword(s):  
Solar Cells ◽  
Molecular Orbital ◽  
Density Functional ◽  
Chemical Reactivity ◽  
Dye Sensitized Solar Cells ◽  
Molecular Properties ◽  
Chemical Hardness ◽  
Visible Absorption ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Eight coumarin derivative dyes were studied by varying theπ-bridge size with different thiophene and thiazole units for their potential use in dye-sensitized solar cells (DSSC). Geometry optimization, the energy levels and electron density of the Highest Occupied Molecular Orbital and the Lowest Unoccupied Molecular Orbital, and ultraviolet-visible absorption spectra were calculated by Density Functional Theory (DFT) and Time-Dependent-DFT. All molecular properties were analyzed to decide which dye was the most efficient. Furthermore, chemical reactivity parameters, such as chemical hardness, electrophilicity index, and electroaccepting power, were obtained and analyzed, whose values predicted the properties of the dyes in addition to the rest of the studied molecular properties. Our calculations allow us to qualitatively study dye molecules and choose the best for use in a DSSC. The effects ofπ-bridges based on thiophenes, thiazoles, and combinations of the two were reviewed; dyes with three units mainly of thiazole were chosen as the best photosensitizers for DSSC.

Characterization of N719 Dye Desorption on TiO2 Nanotube Arrays Used for Dye-Sensitized Solar Cells

2013 ◽  
Vol 631-632 ◽  
pp. 524-529
Author(s):  
Fang Yi Qi ◽  
Qi Yu Huang ◽  
Fang Jiao ◽  
Yi Zhou Zheng ◽  
Yu Chou Gan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Nanotube Arrays ◽  
Solution Ph ◽  
Visible Absorption ◽  
Dye Sensitized ◽  
Uv Visible ◽  
Titanium Foils ◽  
Sensitized Solar Cells

In this work, we developed a method to quantitative analyze the absorption and desorption of N719 dye on TiO2 nanotube arrays. TiO2 nanotube arrays were fabricated by anodizing titanium foils in an organic electrolyte using a two-electrode configuration with a platinum mesh as the counter electrode. TiO2 nanotube arrays were then annealed under 450 °Cfor 3 hours and immersed in N719 dye solution for 24 hours. The dye-sensitized TiO2 nanotube arrays were soaked in an electrolyte solution and stored in a dark closed vessel for 76 days. Then they were desorbed by KOH solution (pH=10). According to UV-visible absorption spectra and Lambert-Beer's law, the desorption rate of N719 dye on 9 µm thick TiO2 nanotube arrays was calculated to be 36%. The results provide a valuable reference to study the dye desorption and stability of the dye-sensitized solar cells.

Optical Absorption Modeling of bilayer photoanode based on Cu@TiO2 Plasmonic Dye Sensitized Solar Cells towards Photovoltaic Applications

2021 ◽  
Author(s):  
Zia Ur Rehman ◽  
Shahid Ali ◽  
Muhammad Aslam ◽  
Muhammad Idrees ◽  
Anees Ur Rehman ◽  
...  
Keyword(s):  
Solar Cells ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Absorption Efficiency ◽  
Short Circuit Current Density ◽  
Visible Absorption ◽  
Dye Sensitized ◽  
Uv Visible ◽  
Sensitized Solar Cells

Abstract A periodic array of core–shell Cu@TiO2 nanoparticle for plasmonic dye sensitized solar cells (DSSCs) in the wavelength range between 350–750 nm was studied. The size of copper nanospheres was 70 nm while the length and diameter of the copper nanorods were 100 and 10 nm, respectively. The UV-Visible absorption spectrum showed that the photo-anode based copper added TiO2 has 29.3% absorption capability compared with copper-free TiO2. TiO2 with shell thickness of 5 nm coated copper exhibited the absorption efficiency of 71.9%, while short circuit current density of 17.52 mA cm− 2 for Ci@TiO2 photo-anode. This was attributed to a strong localized electric field around ultra-thin TiO2-coated copper nanospheres. The UV-Visible results of different geometries indicated that the spherical-shaped Cu@TiO2 nanoparticles induced the high absorption capability of 3.4% compared to rod-shaped Cu@TiO2 nanoparticles. The hybrid nanorods/nanospheres bilayer photo-anode showed the high optical UV-Visible absorption of 11.42% as compared with nanospheres/nanorods, ascribed to the large surface area for dye-loading excellent light scattering.

A Varied Alkyl Chains of Ruthenium(II) Complexes for Dye Sensitized Solar Cells (DSSCs)

2018 ◽  
Vol 382 ◽  
pp. 359-363
Author(s):  
Chonchanok Talodthaisong ◽  
Kittiya Wongkhan ◽  
Rukkiat Jitchati
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Visible Spectrum ◽  
Visible Absorption ◽  
Alkyl Chains ◽  
Dye Sensitized ◽  
Mlct Transition ◽  
Entire Visible Spectrum ◽  
Sensitized Solar Cells

Ruthenium(II) complexes were synthesized and characterized for dye-sensitized solar cells (DSSCs) with varied alkyl chains specifically methyl (PC01), hexyl (PC02) and octyl (PC03). The photophysical property was studied by UV-Visible absorption. The results showed that the main absorption peaks were asigned to the metal to ligand charge transfer (MLCT) transition (350-600 nm). The incident photon to current conversion efficiency (IPCE) covered the entire visible spectrum reaching to 18-20% at 520 nm. The DSSC performances were investigated with liquid iodide/tri-iodide electrolyte under standard AM 1.5. PC01-PC03 showed that the power conversion efficiency (h) were obtained at 3.08%, 3.18% and 3.14%, respectively, compared with N719 (7.80%). Interestingly, PC02 and PC03 showed the long term stability with %hlossbetter than the standard up to 1000 h.

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