scholarly journals Novel design of organic donor–acceptor dyes without carboxylic acid anchoring groups for dye-sensitized solar cells

2014 ◽  
Vol 2 (17) ◽  
pp. 3367 ◽  
Author(s):  
Tsuyoshi Michinobu ◽  
Norifusa Satoh ◽  
Jinhua Cai ◽  
Yongrong Li ◽  
Liyuan Han
Keyword(s):  
Solar Cells ◽  
Carboxylic Acid ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Donor Acceptor ◽  
Anchoring Groups ◽  
Sensitized Solar Cells ◽  
Novel Design

Enhanced performance of dye-sensitized solar cells with Y-shaped organic dyes containing di-anchoring groups

2016 ◽  
Vol 40 (3) ◽  
pp. 2799-2805 ◽  
Author(s):  
Hailang Jia ◽  
Kang Shen ◽  
Xuehai Ju ◽  
Mingdao Zhang ◽  
Hegen Zheng
Keyword(s):  
Solar Cells ◽  
Carboxylic Acid ◽  
Organic Dyes ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Anchoring Groups ◽  
Sensitized Solar Cells

Introducing two carboxylic acid anchors by the benzene bridge in the design of sensitizers can effectively improve the performance of DSSCs.

Dye-sensitized solar cells based on triazine-linked porphyrin dyads containing one or two carboxylic acid anchoring groups

2014 ◽  
Vol 1 (3) ◽  
pp. 256-270 ◽  
Author(s):  
Galateia E. Zervaki ◽  
Panagiotis A. Angaridis ◽  
Emmanuel N. Koukaras ◽  
Ganesh D. Sharma ◽  
Athanassios G. Coutsolelos
Keyword(s):  
Solar Cells ◽  
Carboxylic Acid ◽  
Power Conversion Efficiency ◽  
Power Conversion ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Carboxylic Acid Groups ◽  
Anchoring Groups ◽  
Covalently Linked ◽  
Sensitized Solar Cells

Porphyrin dyads, covalently linked by 1,3,5-triazine, either with one or two carboxylic acid groups, were synthesized and used as sensitizers in DSSCs, resulting in power conversion efficiency higher than 5%.

Zinc phthalocyanine sensitizer having double carboxylic acid anchoring groups for dye-sensitized solar cells with cobalt(ii/iii)-based redox electrolyte

RSC Advances ◽  
2015 ◽  
Vol 5 (100) ◽  
pp. 82292-82295 ◽  
Author(s):  
Mutsumi Kimura ◽  
Yuki Tohata ◽  
Takuro Ikeuchi ◽  
Shogo Mori
Keyword(s):  
Solar Cells ◽  
Carboxylic Acid ◽  
Conversion Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Zinc Phthalocyanine ◽  
Dye Sensitized ◽  
Redox Electrolyte ◽  
Anchoring Groups ◽  
Sensitized Solar Cells

Double anchored ZnPc sensitizer PcS25 exhibited higher conversion efficiency in dye-sensitized solar cells with cobalt(ii/iii)-based redox electrolyte than single-anchored ZnPc sensitizers.

Molecular engineering of anchoring groups for designing efficient triazatruxene-based organic dye-sensitized solar cells

2019 ◽  
Vol 43 (17) ◽  
pp. 6480-6491 ◽  
Author(s):  
Narendra Nath Ghosh ◽  
Md. Habib ◽  
Anup Pramanik ◽  
Pranab Sarkar ◽  
Sougata Pal
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Organic Dye ◽  
Molecular Engineering ◽  
Dye Sensitized ◽  
Anchoring Groups ◽  
Sensitized Solar Cells

Triazatruxene with designed anchoring groups provides better photovoltaic activities.

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.

Donor-π-acceptor, triazine-linked porphyrin dyads as sensitizers for dye-sensitized solar cells

2015 ◽  
Vol 19 (01-03) ◽  
pp. 175-191 ◽  
Author(s):  
Ganesh D. Sharma ◽  
Galateia E. Zervaki ◽  
Kalliopi Ladomenou ◽  
Emmanuel N. Koukaras ◽  
Panagiotis P. Angaridis ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Carboxylic Acid ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Dye Sensitized Solar Cells ◽  
Orbital Energy ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Two porphyrin dyads with the donor-π-acceptor molecular architecture, namely ( ZnP )-[triazine-gly]-( H 2 PCOOH ) and ( ZnP )-[triazine-Npip]-( H 2 PCOOH ), which consist of a zinc-metalated porphyrin unit and a free-base porphyrin unit covalently linked at their peripheries to a central triazine group, substituted either by a glycine in the former or a N-piperidine group in the latter, have been synthesized via consecutive amination substitution reactions of cyanuric chloride. The UV-vis absorption spectra and cyclic-voltammetry measurements of the two dyads, as well as theoretical calculations based on Density Functional Theory, suggest that they have suitable frontier orbital energy levels for use as sensitizers in dye-sensitized solar cells. Dye-sensitized solar cells based on ( ZnP )-[triazine-gly]-( H 2 PCOOH ) and ( ZnP )-[triazine-Npip]-( H 2 PCOOH ) have been fabricated, and they were found to exhibit power conversion efficiency values of 5.44 and 4.15%, respectively. Photovoltaic measurements (J–V curves) and incident photon to current conversion efficiency spectra of the two solar cells suggest that the higher power conversion efficiency value of the former solar cell is a result of its enhanced short circuit current, open circuit voltage, and fill factor values, as well as higher dye loading. This is ascribed to the existence of two carboxylic acid anchoring groups in ( ZnP )-[triazine-gly]-( H 2 PCOOH ), compared to one carboxylic acid group in ( ZnP )-[triazine-Npip]-( H 2 PCOOH ), which leads to a more effective binding onto the TiO 2 photoanode. Electrochemical impedance spectra show evidence that the ( ZnP )-[triazine-gly]-( H 2 PCOOH ) based solar cell exhibits a longer electron lifetime and more effective suppression of charge recombination reactions between the injected electrons and electrolyte.

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