Tuning the HOMO and LUMO Energy Levels of Organic Chromophores for Dye Sensitized Solar Cells

2007 ◽  
Vol 72 (25) ◽  
pp. 9550-9556 ◽  
Author(s):  
Daniel P. Hagberg ◽  
Tannia Marinado ◽  
Karl Martin Karlsson ◽  
Kazuteru Nonomura ◽  
Peng Qin ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Levels ◽  
Dye Sensitized Solar Cells ◽  
Lumo Energy ◽  
Organic Chromophores ◽  
Dye Sensitized ◽  
Homo And Lumo ◽  
Sensitized Solar Cells ◽  
Homo And Lumo Energy

Tuning the HOMO and LUMO Energy Levels of Organic Dyes with N-Carboxomethylpyridinium as Acceptor To Optimize the Efficiency of Dye-Sensitized Solar Cells

2013 ◽  
Vol 117 (18) ◽  
pp. 9076-9083 ◽  
Author(s):  
Ming Cheng ◽  
Xichuan Yang ◽  
Fuguo Zhang ◽  
Jianghua Zhao ◽  
Licheng Sun
Keyword(s):  
Solar Cells ◽  
Organic Dyes ◽  
Energy Levels ◽  
Dye Sensitized Solar Cells ◽  
Lumo Energy ◽  
Dye Sensitized ◽  
Homo And Lumo ◽  
Sensitized Solar Cells ◽  
Homo And Lumo Energy

Synthesis and Mechanistic Studies of Organic Chromophores with Different Energy Levels for p-Type Dye-Sensitized Solar Cells

2010 ◽  
Vol 114 (10) ◽  
pp. 4738-4748 ◽  
Author(s):  
Peng Qin ◽  
Joanna Wiberg ◽  
Elizabeth A. Gibson ◽  
Mats Linder ◽  
Lin Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Levels ◽  
Dye Sensitized Solar Cells ◽  
Mechanistic Studies ◽  
Organic Chromophores ◽  
Dye Sensitized ◽  
P Type ◽  
Sensitized Solar Cells

scholarly journals N-Aryl Arenedicarboximides as Tunable Panchromatic Dyes for Molecular Solar Cells

2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
Zhi Cao ◽  
Premchendar Nandhikonda ◽  
Adriana Penuela ◽  
Stephanie Nance ◽  
Michael D. Heagy
Keyword(s):  
Solar Cells ◽  
Organic Dyes ◽  
Energy Levels ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Donor And Acceptor ◽  
Molecular Dyads ◽  
Cyclic Voltammetry Method ◽  
Homo And Lumo ◽  
Sensitized Solar Cells

Three organic dyes designed as molecular dyads were prepared that feature a common naphthalimide acceptor andN-aryl donors. One of these incorporated an additional cyanoacrylic acid linker and conjugated thiophene bridge inserted between donor and acceptor groups. Electrochemical and photochemical characterizations have been carried out on nanocrystalline TiO2dye-sensitized solar cells which were fabricated with these dyes as the sensitizing component. HOMO and LUMO energies were also calculated using TDDFT methods and validated by the cyclic voltammetry method. A key finding from this study indicates that computational methods can provide energy values in close agreement to experimental for theN-aryl-naphthalimide system. Relative to HOMO/LUMO energy levels ofN719, the dyes based on naphthalimide chromophore are promising candidates for metal-free DSSCs.

A2 and A2B2 Benzoporphyrins as sensitizers for dye-sensitized solar cells

2019 ◽  
Vol 23 (04n05) ◽  
pp. 599-610 ◽  
Author(s):  
Siddhartha Kumar ◽  
Whitney Webre ◽  
Jacob Schaffner ◽  
Sheikh M. S. Islam ◽  
Francis D’Souza ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Dye Sensitized Solar Cells ◽  
Acid Group ◽  
Dye Sensitized ◽  
Dye Loading ◽  
Two Factors ◽  
Homo And Lumo ◽  
Anchoring Group ◽  
Sensitized Solar Cells

The first example of A2B2 tetrabenzoporphyrin (KW-4) was synthesized, characterized and evaluated as a sensitizer for dye-sensitized solar cells. UV-vis and fluorescence spectroscopy revealed red-shifted and broadened absorption spectra of A2B2 tetrabenzoporphyrin as compared with its A2 dibenzo- and A2B2 dibenzoporphyrin analogues, which is a desired feature of dyes for dye-sensitized solar cells. DFT calculations also indicate favorable electron density distribution on the HOMO and LUMO of KW-4. However, the power conversion efficiency of the solar cell based on tetrabenzoporphyrin KW-4 displayed inferior performance than that of the solar cell based on A2 dibenzoporphyrin KW-2. The lower performance of the KW-4 cell was ascribed to two factors: the low lying LUMO energy level leading to less efficient electron injection and the “flat geometry” of the dye on TiO2surface facilitating charge recombination and decreasing dye loading. The investigation of anchoring group effect suggests that the acrylic acid group is a better anchoring group than pentadienyl carboxylic acid.

scholarly journals Organic Chromophores Based on a Fused Bis-Thiazole Core and Their Application in Dye-Sensitized Solar Cells

2013 ◽  
Vol 2013 (26) ◽  
pp. 5961-5961 ◽  
Author(s):  
Alessio Dessì ◽  
Gabriella Barozzino Consiglio ◽  
Massimo Calamante ◽  
Gianna Reginato ◽  
Alessandro Mordini ◽  
...  
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Organic Chromophores ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Metal-free efficient dye-sensitized solar cells based on thioalkylated bithiophenyl organic dyes

2020 ◽  
Vol 8 (43) ◽  
pp. 15322-15330 ◽  
Author(s):  
Fang-Sian Lin ◽  
Pragya Priyanka ◽  
Miao-Syuan Fan ◽  
Sureshraju Vegiraju ◽  
Jen-Shyang Ni ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Dyes ◽  
Dye Sensitized Solar Cells ◽  
Metal Free ◽  
Organic Chromophores ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

A series of new metal-free organic dyes based on 3,3′-dithioalkyl-2,2′-bithiophene (SBT) organic chromophores was synthesized for use in dye-sensitized solar cells (DSSCs).

scholarly journals Energy levels of natural sensitizers extracted from rengas (Gluta spp.) and mengkulang (Heritiera elata) wood for dye-sensitized solar cells

2017 ◽  
Vol 6 (2) ◽  
Author(s):  
Nur ezyanie Safie ◽  
Norasikin Ahmad ludin ◽  
Norul Hisham Hamid ◽  
Suhaila Sepeai ◽  
Mohd Asri Mat Teridi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Levels ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Importance of fluorescence lifetimes for efficient indoline dyes in dye-sensitized solar cells

RSC Advances ◽  
2015 ◽  
Vol 5 (71) ◽  
pp. 57721-57724 ◽  
Author(s):  
M. Matsui ◽  
R. Aoki ◽  
D. Nishiwaki ◽  
Y. Kubota ◽  
K. Funabiki ◽  
...  
Keyword(s):  
Solar Cells ◽  
Molecular Design ◽  
Dye Sensitized Solar Cells ◽  
Fluorescence Lifetimes ◽  
Absorption Bands ◽  
Dye Sensitized ◽  
Homo And Lumo ◽  
Sensitized Solar Cells

To make a molecular design of efficient indoline dyes, fluorescence lifetimes should be longer than ca. 0.8 ns in chloroform, in addition to suitable HOMO and LUMO levels and bathochromic UV-vis absorption bands.

scholarly journals Guest-Host Interactions in Symmetrical Carboxy Heptamethine Cyanine Dyes-Titanium Dioxide Systems: Synthesis, Theoretical Calculations, Aggregation Properties, and Application in Dye-Sensitized Solar Cells

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Rodrigo da Costa Duarte ◽  
Matheus Costa de Oliveira ◽  
Josene Maria Toldo ◽  
Paulo Fernando Bruno Gonçalves ◽  
Marcos José Leite Santos ◽  
...  
Keyword(s):  
Solar Cells ◽  
Active Sites ◽  
Theoretical Calculations ◽  
Energy Levels ◽  
Dye Sensitized Solar Cells ◽  
Fluorescence Emission ◽  
Cyanine Dyes ◽  
Cell Efficiency ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

In this work, the role of deoxycholic acid (DCA) as a coadsorbent was investigated in the sensitization of mesoporous TiO2 layers (host) with symmetrical carboxy heptamethine cyanine dyes (guest). Different approaches have been tested, aimed at reducing the H-aggregation and minimizing the competition between cyanine molecules and DCA for active sites of the host, thus improving solar cell efficiency. Heptamethine cyanines containing carboxylic anchoring groups were obtained with good yields. The cyanines present UV-Vis absorption in methanol and dimethylformamide solutions ascribed to fully allowed electronic transitions ( 1 π π ∗ ), as well as fluorescence emission in the NIR region, with any evidence of aggregations in both ground and excited states. TD-DFT calculations were also performed in order to study the geometry and charge distribution of these compounds in their ground and excited electronic states. Solid-state photophysics indicates that the cyanines showed excellent adsorption on TiO2, which can be justified by the presence of the -COOH moieties in the structure. Photophysical measurements have revealed the best concentrations of dye and DCA, which resulted in efficient inhibition of cyanine H-aggregates on the TiO2 surface in addition to allow large dye loading. HOMO and LUMO energy levels of the dyes were identified by cyclic voltammetry, showing oxidation and reduction potentials within acceptable limits for application as a photosensitizer in dye-sensitized solar cells (DSSCs) based on a TiO2 mesoporous photoanode. Assembled DSSCs have shown a large improvement of the electrical parameters and efficiency when a balance between dye aggregation and the competition to the host active sites was reached.

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