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.

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).

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.

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.

scholarly journals Pyran-Squaraine as Photosensitizers for Dye-Sensitized Solar Cells: DFT/TDDFT Study of the Electronic Structures and Absorption Properties

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Reda M. El-Shishtawy ◽  
Shaaban A. Elroby ◽  
Abdullah M. Asiri ◽  
Rifaat H. Hilal
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Nbo Analysis ◽  
Basis Set ◽  
Absorption Properties ◽  
Charge Delocalization ◽  
Squaraine Dyes ◽  
Dye Sensitized ◽  
Donor Acceptor ◽  
Sensitized Solar Cells

In an effort to provide, assess, and evaluate a theoretical approach which enables designing efficient donor-acceptor dye systems, the electronic structure and optical properties of pyran-squaraine as donor-acceptor dyes used in dye-sensitized solar cells were investigated. Ground state properties have been computed at the B3LYP/6-31+G**level of theory. The long-range corrected density functionals CAM-B3LYP, PBEPBE, PBE1PBE (PBE0), and TPSSH with 6-311++G**were employed to examine absorption properties of the studied dyes. In an extensive comparison between experimental results and ab initio benchmark calculations, the TPSSH functional with 6-311++G**basis set was found to be the most appropriate in describing the electronic properties for the studied pyran and squaraine dyes. Natural transition orbitals (NTO), frontier molecular orbitals (FMO), LUMO, HOMO, and energy gaps, of these dyes, have been analyzed to show their effect on the process of electron injection and dye regeneration. Interaction between HOMO and LUMO of pyran and squaraine dyes was investigated to understand the recombination process and charge-transfer process involving these dyes. Additionally, we performed natural bond orbital (NBO) analysis to investigate the role of charge delocalization and hyperconjugative interactions in the stability of the molecule.

Kinetics of dye regeneration in liquid electrolyte unveils efficiency of 10.5% in dye-sensitized solar cells

2018 ◽  
Vol 6 (42) ◽  
pp. 11444-11456 ◽  
Author(s):  
Jonnadula Venkata Suman Krishna ◽  
Narra Vamsi Krishna ◽  
Towhid H. Chowdhury ◽  
Suryaprakash Singh ◽  
Idriss Bedja ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Power Conversion ◽  
Dye Sensitized Solar Cells ◽  
Liquid Electrolyte ◽  
Dye Sensitized Solar Cell ◽  
Dye Sensitized ◽  
Dye Regeneration ◽  
Sensitized Solar Cells ◽  
Kinetics Of

We have designed and synthesised four novel porphyrin sensitizers for dye-sensitized solar cell applications and shown power conversion efficiency of 10.5%.

A polymer and graphene layer to increase dye regeneration and suppress back electron transfer in dye sensitized solar cells

2017 ◽  
Vol 53 (49) ◽  
pp. 6629-6632 ◽  
Author(s):  
Vediappan Sudhakar ◽  
Arulraj Arulkashmir ◽  
Kothandam Krishnamoorthy
Keyword(s):  
Electron Transfer ◽  
Solar Cells ◽  
Graphene Layer ◽  
Dye Sensitized Solar Cells ◽  
Blocking Layer ◽  
Dye Sensitized ◽  
Back Electron Transfer ◽  
Dye Regeneration ◽  
Sensitized Solar Cells

A polymer–graphene blocking layer decreases back electron transfer and increases dye regeneration that improved the DSSC efficiency to 10.4%.

scholarly journals Fused Thiazine Tethered Metal-Free Dyes for Dye Sensitized Solar Cells: A Computational Investigation

2021 ◽  
Vol 33 (10) ◽  
pp. 2373-2378
Author(s):  
K. Gokula Krishnan ◽  
V. Saravanan ◽  
C. Udhaya Kumar ◽  
C. Ramalingan
Keyword(s):  
Solar Cells ◽  
Driving Forces ◽  
Dye Sensitized Solar Cells ◽  
Computational Studies ◽  
Computational Investigation ◽  
Dye Sensitized ◽  
B3lyp Method ◽  
Harvesting Efficiency ◽  
Dye Regeneration ◽  
Sensitized Solar Cells

Three novel cyanoacetamide decorated phenothiazines (1a-c) have been designed. Structural and photo-physical properties of the molecules 1a-c have been investigated. To better realize the charge transport process involved in the dye-sensitized solar cells (DSSCs), computational studies have been performed using B3LYP and CAM-B3LYP method for the dyes 1a-c. Theoretical findings for DSSCs include LHE (light-harvesting efficiency) and driving forces such as electron injection (ΔGinject) and dye regeneration have been calculated to envisage the most appropriate dyes for the application of DSSC.

Fused Fluorenylindolenine-Donor-Based Unsymmetrical Squaraine Dyes for Dye-Sensitized Solar Cells

2018 ◽  
Vol 10 (31) ◽  
pp. 26335-26347 ◽  
Author(s):  
Rajesh Bisht ◽  
Vediappan Sudhakar ◽  
Munavvar Fairoos Mele Kavungathodi ◽  
Neeta Karjule ◽  
Jayaraj Nithyanandhan
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Squaraine Dyes ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

π-Extended cis-Configured Unsymmetrical Squaraine Dyes for Dye-Sensitized Solar Cells: Panchromatic Response

2019 ◽  
Vol 2 (12) ◽  
pp. 8464-8472 ◽  
Author(s):  
Vellimalai Punitharasu ◽  
Munavvar Fairoos Mele Kavungathodi ◽  
Ambarish Kumar Singh ◽  
Jayaraj Nithyanandhan
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Squaraine Dyes ◽  
Dye Sensitized ◽  
Sensitized Solar Cells
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