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.

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.

A new sterically hindered asymmetric zinc phthalocyanine as an efficient sensitizer for dye-sensitized solar cells

2021 ◽  
Author(s):  
Kevser Harmandar ◽  
Kevin Granados-Tavera ◽  
Merve Keskin ◽  
Mehmet Nebioğlu ◽  
İlkay Şişman ◽  
...  
Keyword(s):  
Solar Cells ◽  
Carboxylic Acid ◽  
Dye Sensitized Solar Cells ◽  
Zinc Phthalocyanine ◽  
Tert Butyl ◽  
Dye Sensitized ◽  
Anchoring Group ◽  
Sterically Hindered ◽  
Sensitized Solar Cells

An asymmetric zinc phthalocyanine dye (KH1) bearing three 2,6-di-tert-butyl-4-methylphenoxy donor groups and carboxylic acid anchoring group was synthesized as a sensitizer for dye-sensitized solar cells (DSSCs). The DSSC based on...

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 multichromophoric supramolecular light-harvesting materials

2014 ◽  
Vol 50 (40) ◽  
pp. 5358-5360 ◽  
Author(s):  
Dillip K. Panda ◽  
Flynt S. Goodson ◽  
Shuvasree Ray ◽  
Sourav Saha
Keyword(s):  
Solar Cells ◽  
Current Efficiency ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Light Harvesting ◽  
Power Conversion ◽  
Dye Sensitized Solar Cells ◽  
Zinc Phthalocyanine ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Dye-sensitized solar cells comprised of supramolecular light-harvesting zinc-phthalocyanine⋯peryleneimide dyads on TiO2 films generate photoelectricity throughout the 300–650 nm region with the power conversion efficiency reaching up to 2.3% and the incident-photon-to-current-efficiency up to 40% under one-sun conditions.

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%.

Cobalt-Based Electrolytes for Efficient Flexible Dye-Sensitized Solar Cells

MRS Advances ◽  
2019 ◽  
Vol 4 (08) ◽  
pp. 481-489
Author(s):  
Jihun Kim ◽  
Horim Lee ◽  
Dong Young Kim ◽  
Sehyun Kim ◽  
Yongsok Seo
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Electrochemical Impedance ◽  
Dye Sensitized Solar Cells ◽  
Redox System ◽  
Open Circuit ◽  
Electron Recombination ◽  
Dye Sensitized ◽  
Redox Electrolyte ◽  
Sensitized Solar Cells

AbstractWe have developed new flexible dye-sensitized solar cells (DSSCs) comprising organic dye (JH-1), cobalt redox electrolyte and hierarchically structured TiO2 (HS-TiO2) photoelectrode prepared using an electrostatic spray method. The performance of JH-1 sensitized flexible DSSC with a cobalt redox electrolyte was compared with those of N719-based DSSC and DSSC with I-/ I3- redox electrolyte. As a result, JH-1 sensitized flexible DSSC with [Co(Ⅲ/Ⅱ)(bpy-pz)3](PF6)3/2 redox system exhibited a high photocurrent density of 9.17 mA cm-2, an open circuit voltage of 0.953 V, a fill factor of 0.70, and a power conversion efficiency of 6.12% under 1 sun illumination (100 mW cm-2). The incident photon-to-current conversion efficiency was measured to explain the photocurrent generation difference by different dyes and electrolytes. The electron recombination lifetime of cells was measured by intensity-modulated photovoltage spectroscopy. Mass transport in DSSCs employing cobalt redox electrolytes was also investigated by the photocurrent transient measurements and electrochemical impedance spectroscopy (EIS) analysis.

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