scholarly journals Modeling Excited States and Alignment of Energy Levels in Dye-Sensitized Solar Cells: Successes, Failures, and Challenges

2013 ◽  
Vol 117 (8) ◽  
pp. 3685-3700 ◽  
Author(s):  
Mariachiara Pastore ◽  
Simona Fantacci ◽  
Filippo De Angelis
Keyword(s):  
Solar Cells ◽  
Excited States ◽  
Energy Levels ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Correlating excited state and charge carrier dynamics with photovoltaic parameters of perylene dye sensitized solar cells: influences of an alkylated carbazole ancillary electron-donor

2017 ◽  
Vol 19 (3) ◽  
pp. 2549-2556 ◽  
Author(s):  
Yang Li ◽  
Junting Wang ◽  
Yi Yuan ◽  
Min Zhang ◽  
Xiandui Dong ◽  
...  
Keyword(s):  
Solar Cells ◽  
Excited States ◽  
Dye Sensitized Solar Cells ◽  
Carrier Dynamics ◽  
Charge Carriers ◽  
Dye Sensitized ◽  
Charge Carrier Dynamics ◽  
Photovoltaic Parameters ◽  
Perylene Dye ◽  
Sensitized Solar Cells

Two perylene dyes characteristic of electron-donors phenanthrocarbazole (PC) and carbazyl functionalized PC are selected to study the complicated dynamics of excited states and charge carriers, which underlie the photovoltaic parameters of dye-sensitized solar cells (DSCs).

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

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 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.

Theoretical study of electronic structure and excited states properties of two dyes for dye-sensitized solar cells

2009 ◽  
Vol 107 (23-24) ◽  
pp. 2569-2577 ◽  
Author(s):  
Yuanzuo Li ◽  
Xiaohong Zhao ◽  
Huixing Li ◽  
Dezhi Jin ◽  
Fengcai Ma ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Solar Cells ◽  
Excited States ◽  
Theoretical Study ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Rhodaninedyes for dye-sensitized solar cells :  spectroscopy, energy levels and photovoltaic performance

2009 ◽  
Vol 11 (1) ◽  
pp. 133-141 ◽  
Author(s):  
Tannia Marinado ◽  
Daniel P. Hagberg ◽  
Maria Hedlund ◽  
Tomas Edvinsson ◽  
Erik M. J. Johansson ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Levels ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Dye-Sensitized Solar Cells Based on Quinoxaline Dyes: Effect of π-Linker on Absorption, Energy Levels, and Photovoltaic Performances

2014 ◽  
Vol 118 (30) ◽  
pp. 16552-16561 ◽  
Author(s):  
Kai Pei ◽  
Yongzhen Wu ◽  
Ashraful Islam ◽  
Shiqin Zhu ◽  
Liyuan Han ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Levels ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Absorption Energy ◽  
Sensitized Solar Cells
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