Photovoltaic cells with various azo dyes as components of the active layer

Derkowska-Zielinska, Beata; Gondek, E.; Pokładko-Kowar, Monika; Kaczmarek‐Kędziera, Anna; Kysil, Andrii I.; Lakshminarayana, G.; Krupka, Oksana

doi:10.1016/j.solener.2020.04.022

Cited by 38 publications

(14 citation statements)

References 23 publications

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“…The activity of the azo dyes in bulk heterojunction solar cells (BHJ) has been already reported [ 8 , 9 , 10 ], where devices utilizing such compounds as donor components with fullerene acceptor achieved an efficiency of 3.54%. Much worse performance of BHJ has been reported, when azo dyes have been considered for a non-fullerene acceptor, with poly(3-octylthiophene) donor, where such devices have shown efficiency up to 0.65% [ 11 ]. Apart from this, compounds consisting of azo-moiety have been investigated as a sensitizer in dye-sensitized solar cells (DSSC) [ 12 , 13 ] or as a hole transporting material (HTM) in perovskite solar cells (PSC) [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Azocoumarin Derivatives—Synthesis and Characterization

Piechowska

Baranowska-Łączkowska

Łączkowski

et al. 2022

IJMS

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The paper presents synthesis and characterization of nine new thiazolyl-(phenyldiazenyl)-2H-chromen-2-one dyes. The impact of substituent structure in thiazole ring in the synthesized azocoumarin derivatives on electrochemical properties, photoisomerization process and photovoltaic response was examined. The dyes were electrochemically active and undergo reduction and oxidation processes. They showed low electrochemically estimated energy band gap in the range of 1.71–2.13 eV. Photoisomerization process of the synthesized molecules was studied in various solvents such as ethanol, chloroform and N,N-dimethylformamide (DMF) upon the UV illumination. It was found that novel azodyes showed reversible trans-cis-trans isomerization and exhibited long thermal back to the trans form, that was even 7 days in DMF. Selected azocoumarin were molecularly dispersed in polystyrene for preparation of guest-host azopolymer systems to study the cis-trans thermal isomerization of obtained dyes in solid state. The photovoltaic activity of the azochromophores was tested in bulk-heterojunction solar cells. They acting as weak donors in device with structure ITO/PEDOT:PSS/dye:PC70BM/Al. No photovoltaic response of cells with azocoumarin derivatives bearing 4-fluorobenzene, 3,4-dichlorobenzene, or 4-(1-adamantyl) unit was found. Additionally, dye which showed the best activity was examined in three-component solar cells ITO/PEDOT:PSS/PTB7:PC70BM:dye/PFN/Al.

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Section: Introductionmentioning

confidence: 99%

Novel Azocoumarin Derivatives—Synthesis and Characterization

Piechowska

Baranowska-Łączkowska

Łączkowski

et al. 2022

IJMS

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“…K-Azo offers an excellent chromophore retaining strong absorption that gives colour to the sensitizer as well as enhances the thermal and photostability of the photo films. 31,32 Plus, kojic acid is a non-toxic natural product deliberating admirable biodegradability and tyrosinase (catalyzing enzyme for melanin production) inhibition properties. 33 Kojic acid is prepared by fermentation of sago biomass 34 while azobenzene is obtained from the esterification process.…”

Section: Introductionmentioning

confidence: 99%

“…It is composed of azobenzene molecule (C 12 H 10 N 2 ) having two phenyls (C 6 H 5 ) rings joined by NN group linkage and hence termed as an azo sensitizer. K‐Azo offers an excellent chromophore retaining strong absorption that gives colour to the sensitizer as well as enhances the thermal and photostability of the photo films 31,32 . Plus, kojic acid is a non‐toxic natural product deliberating admirable biodegradability and tyrosinase (catalyzing enzyme for melanin production) inhibition properties 33 .…”

Section: Introductionmentioning

confidence: 99%

Organic sensitization of graphene oxide and reduced graphene oxide thin films for photovoltaic applications

et al. 2021

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In this work, a new organic compound (K-Azo) was introduced to enhance the electrical and optical performance of graphene oxide (GO) and reduced GO (rGO) nanostructured films. The improved and modified chemical vapour method was employed for the synthesis of GO and rGO. The photophysical characterization of thin films was performed by applying analytical techniques including X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, ultraviolet-visible, and Raman spectroscopy. The electrical properties (I-V characteristic) of GO and rGO thin films displayed higher conductivity which was 4.07 × 10 −7 and 1.10 × 10 −3 S/cm, respectively in the presence of organic sensitizer. However, GO and rGO thin films showed 9.91 × 10 −7 and 6.17 × 10 −4 S/cm, respectively in the absence of K-Azo sensitizer.Optical and electrical investigations indicated that the characteristics of GO and rGO were improved due to the presence of organic sensitizer. The longrange π-electron delocalization in organic sensitizer contributed to higher conductivity for potential photovoltaic solar cell applications.

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“…In academia and the industry, the conversion of electricity, chemical energy, fossil fuels, light energy and other forms of energy sources into mechanical motion has attracted widespread attention. As a sustainable, inexhaustible source of clean energy, solar energy offers an effective solution to alleviate the energy crisis [ 1 , 2 ]. Therefore, the conversion of solar energy to mechanical motion is particularly attractive.…”

Section: Introductionmentioning

confidence: 99%

Mechanically Strong, Liquid-Resistant Photothermal Bioplastic Constructed from Cellulose and Metal-Organic Framework for Light-Driven Mechanical Motion

Sun

et al. 2021

Molecules

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The development of photothermal materials with a high light-to-heat conversion capability is essential for the utilization of clean solar energy. In this work, we demonstrate the use of a novel and sustainable concept involving cellulose liquefaction, rapid gelation, in situ synthesis and hot-press drying to convert cellulose and metal–organic framework (Prussian blue) into a stable photothermal bioplastic that can harvest sunlight and convert it into mechanical motion. As expected, the obtained Prussian blue@cellulose bioplastic (PCBP) can effectively absorb sunlight and the surface can be heated up to 70.3 °C under one sun irradiation (100 mW cm−2). As a demonstration of the practicality of PCBP, it was successfully used to drive a Stirling engine motion. Meanwhile, hot-pressing promotes the densification of the structure of PCBP and, therefore, improves the resistance to the penetration of water/non-aqueous liquids. Moreover, PCBP shows good mechanical properties and thermal stability. Given the excellent photothermal performance and environmentally friendly features of photothermal conversion bioplastic, we envisage this sustainable plastic film could play important roles toward diversified applications: a photothermal layer for thermoelectric generator, agricultural films for soil mulching and photothermal antibacterial activity, among others.

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Photovoltaic cells with various azo dyes as components of the active layer

Cited by 38 publications

References 23 publications

Novel Azocoumarin Derivatives—Synthesis and Characterization

Novel Azocoumarin Derivatives—Synthesis and Characterization

Organic sensitization of graphene oxide and reduced graphene oxide thin films for photovoltaic applications

Mechanically Strong, Liquid-Resistant Photothermal Bioplastic Constructed from Cellulose and Metal-Organic Framework for Light-Driven Mechanical Motion

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