scholarly journals Insight into quinoxaline containing D–π–A dyes for dye-sensitized solar cells with cobalt and iodine based electrolytes: the effect of π-bridge on the HOMO energy level and photovoltaic performance

2015 ◽  
Vol 3 (43) ◽  
pp. 21733-21743 ◽  
Author(s):  
Xing Li ◽  
Yue Hu ◽  
Irene Sanchez-Molina ◽  
Ying Zhou ◽  
Fengtao Yu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Driving Force ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Spectral Absorption ◽  
Dye Sensitized ◽  
Dye Regeneration ◽  
Sensitized Solar Cells ◽  
Insight Into ◽  
Homo Energy Level

Maintaining a balance between the spectral absorption range and driving force for dye regeneration is the key to increase the photovoltaic performance of dye-sensitized solar cells.

Efficient dye regeneration at low driving force achieved in triphenylamine dye LEG4 and TEMPO redox mediator based dye-sensitized solar cells

2015 ◽  
Vol 17 (24) ◽  
pp. 15868-15875 ◽  
Author(s):  
Wenxing Yang ◽  
Nick Vlachopoulos ◽  
Yan Hao ◽  
Anders Hagfeldt ◽  
Gerrit Boschloo
Keyword(s):  
Solar Cells ◽  
Driving Force ◽  
Open Circuit Voltage ◽  
Dye Sensitized Solar Cells ◽  
Open Circuit ◽  
Redox Mediator ◽  
Redox Mediators ◽  
Dye Sensitized ◽  
Dye Regeneration ◽  
Sensitized Solar Cells

Minimizing the driving force required for the regeneration of oxidized dyes using redox mediators in an electrolyte is essential to further improve the open-circuit voltage and efficiency of dye-sensitized solar cells (DSSCs).

Insight into the effects of the anchoring groups on the photovoltaic performance of unsymmetrical phthalocyanine based dye-sensitized solar cells

2021 ◽  
Author(s):  
Gülenay Tunç ◽  
Michael Zambrano-Angulo ◽  
Barış Seçkin Arslan ◽  
Emre Güzel ◽  
Mehmet Nebioğlu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Theoretical Calculations ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Zinc Phthalocyanines ◽  
Anchoring Groups ◽  
Sensitized Solar Cells ◽  
Insight Into

In this paper, the synthesis, characterization and theoretical calculations of newly synthesized asymmetric zinc phthalocyanines were reported to investigate the influence of different carboxyl anchoring groups on the performance of DSSCs.

Investigation of the minimum driving force for dye regeneration utilizing model squaraine dyes for dye-sensitized solar cells

2017 ◽  
Vol 5 (43) ◽  
pp. 22672-22682 ◽  
Author(s):  
Anusha Pradhan ◽  
Takuya Morimoto ◽  
Maryala Saikiran ◽  
Gaurav Kapil ◽  
Shuzi Hayase ◽  
...  
Keyword(s):  
Solar Cells ◽  
Driving Force ◽  
Dye Sensitized Solar Cells ◽  
Squaraine Dyes ◽  
Dye Sensitized ◽  
Experimental Approaches ◽  
Dye Regeneration ◽  
Sensitized Solar Cells

Combined theoretical and experimental approaches using model squaraine dyes as a representative of NIR sensitizers have demonstrated the possibility for facile dye regeneration, with a very small driving force of 0.12 eV, from the most commonly used iodine based redox electrolytes.

A comparative study of Ru(ii) cyclometallated complexes versus thiocyanated heteroleptic complexes: thermodynamic force for efficient dye regeneration in dye-sensitized solar cells and how low could it be?

2014 ◽  
Vol 16 (28) ◽  
pp. 14874-14881 ◽  
Author(s):  
Maqbool Hussain ◽  
Ashraful Islam ◽  
Idriss Bedja ◽  
Ravindra Kumar Gupta ◽  
Liyuan Han ◽  
...  
Keyword(s):  
Solar Cells ◽  
Comparative Study ◽  
Driving Force ◽  
Dye Sensitized Solar Cells ◽  
Thermodynamic Force ◽  
Dye Sensitized ◽  
Heteroleptic Complexes ◽  
Dye Regeneration ◽  
Cyclometallated Complexes ◽  
Sensitized Solar Cells

Although cyclometallation may produce significantly better light harvesting, a driving force <0.25 eV is not sufficient for effective dye regeneration in DSSCs.

Tetraphenylethylene-bridged double-branched sensitizers featuring hetero-donors for dye-sensitized solar cells

2020 ◽  
Vol 44 (30) ◽  
pp. 12909-12915
Author(s):  
Yi-Qiao Yan ◽  
Yi-Zhou Zhu ◽  
Pan-Pan Dai ◽  
Jun Han ◽  
Mao Yan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Dyes ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Effects of hetero-donors on the photovoltaic performance of tetraphenylethylene-based organic dyes were systematically investigated.

scholarly journals Eco-Friendly Dye-Sensitized Solar Cells Based on Water-Electrolytes and Chlorophyll

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2150
Author(s):  
Ji-Hye Kim ◽  
Sung-Yoon Park ◽  
Dong-Hyuk Lim ◽  
So-Young Lim ◽  
Jonghoon Choi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Plasma Treatment ◽  
Ruthenium Complex ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Dye Adsorption ◽  
Synthesis Process ◽  
Dye Sensitized ◽  
Water Based ◽  
Sensitized Solar Cells

Organic solvents used for electrolytes of dye-sensitized solar cells (DSSCs) are generally not only toxic and explosive but also prone to leakage due to volatility and low surface tension. The representative dyes of DSSCs are ruthenium-complex molecules, which are expensive and require a complicated synthesis process. In this paper, the eco-friendly DSSCs were presented based on water-based electrolytes and a commercially available organic dye. The effect of aging time after the device fabrication and the electrolyte composition on the photovoltaic performance of the eco-friendly DSSCs were investigated. Plasma treatment of TiO2 was adopted to improve the dye adsorption as well as the wettability of the water-based electrolytes on TiO2. It turned out that the plasma treatment was an effective way of improving the photovoltaic performance of the eco-friendly DSSCs by increasing the efficiency by 3.4 times. For more eco-friendly DSSCs, the organic-synthetic dye was replaced by chlorophyll extracted from spinach. With the plasma treatment, the efficiency of the eco-friendly DSSCs based on water-electrolytes and chlorophyll was comparable to those of the previously reported chlorophyll-based DSSCs with non-aqueous electrolytes.

scholarly journals In Depth Analysis of Photovoltaic Performance of Chlorophyll Derivative-Based “All Solid-State” Dye-Sensitized Solar Cells

Molecules ◽  
2020 ◽  
Vol 25 (1) ◽  
pp. 198 ◽  
Author(s):  
Michèle Chevrier ◽  
Alberto Fattori ◽  
Laurent Lasser ◽  
Clément Kotras ◽  
Clémence Rose ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solid State ◽  
Density Functional ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Hole Transport ◽  
Tio2 Electrode ◽  
Dye Sensitized ◽  
Depth Analysis ◽  
Sensitized Solar Cells

Chlorophyll a derivatives were integrated in “all solid-state” dye sensitized solar cells (DSSCs) with a mesoporous TiO2 electrode and 2′,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene as the hole-transport material. Despite modest power conversion efficiencies (PCEs) between 0.26% and 0.55% achieved for these chlorin dyes, a systematic investigation was carried out in order to elucidate their main limitations. To provide a comprehensive understanding of the parameters (structure, nature of the anchoring group, adsorption …) and their relationship with the PCEs, density functional theory (DFT) calculations, optical and photovoltaic studies and electron paramagnetic resonance analysis exploiting the 4-carboxy-TEMPO spin probe were combined. The recombination kinetics, the frontier molecular orbitals of these DSSCs and the adsorption efficiency onto the TiO2 surface were found to be the key parameters that govern their photovoltaic response.

scholarly journals Incorporation of Kojic Acid-Azo Dyes on TiO2 Thin Films for Dye Sensitized Solar Cells Applications

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Carolynne Zie Wei Sie ◽  
Zainab Ngaini
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Azo Dyes ◽  
Kojic Acid ◽  
Organic Dyes ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Tio2 Thin Films ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Sensitization of heavy metal free organic dyes onto TiO2 thin films has gained much attention in dye sensitized solar cells (DSSCs). A series of new kojic acid based organic dyes KA1–4 were synthesized via nucleophilic substitution of azobenzene bearing different vinyl chains A1–4 with kojyl chloride 4. Azo dyes KA1–4 were characterized for photophysical properties employing absorption spectrometry and photovoltaic characteristic in TiO2 thin film. The presence of vinyl chain in A1–4 improved the photovoltaic performance from 0.20 to 0.60%. The introduction of kojic acid obtained from sago waste further increases the efficiency to 0.82–1.54%. Based on photovoltaic performance, KA4 achieved the highest solar to electrical energy conversion efficiency (η = 1.54%) in the series.

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