Engineering of modular organic photovoltaic devices with dye sensitized architecture

Chal, Pousali; Shit, Arnab; Nandi, Arun K.

doi:10.1039/c6ta06909f

Cited by 9 publications

(9 citation statements)

References 53 publications

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“…[20] The imide derivatives are electron dearth centers and thus can function as electron acceptors. A composite of these derivatives and polyaniline (acting as a donor) generated nanostructures that were deployed for dye sensitized solar cell applications.…”

Section: Amino Acid Based Nanostructuresmentioning

confidence: 99%

Amino Acid Based Self‐assembled Nanostructures: Complex Structures from Remarkably Simple Building Blocks

Chakraborty

Gazit

2018

ChemNanoMat

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Amino acids are the simplest biological building blocks capable of forming discreet nanostructures by supramolecular self-assembly. The understanding of the process of organization of amino acid nanostructures is of fundamental importance for the study of metabolic diseases as well as for materials science applications. Although peptide self-assembled structures have been the topic of many review articles, much less attention has been devoted to the ability of amino acid building blocks, both natural and synthetic, to form ordered assemblies with defined architectures and notable physical properties, by the process of self-association. Herein, we try to shed light on amino acid based nanostructures, their fabrication and implications. We discuss self-assembled nanostructures, including hydrogels with nanoscale order, obtained from both modified and unmodified single amino acids. We also envision some future prospects in this emerging field.

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Section: Amino Acid Based Nanostructuresmentioning

confidence: 99%

Amino Acid Based Self‐assembled Nanostructures: Complex Structures from Remarkably Simple Building Blocks

Chakraborty

Gazit

2018

ChemNanoMat

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“…The energy levels of both PPAL and PPAD are calculated from cyclic voltammetry (CV). The highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels of PPAL are at −5.95 eV and −3.95 eV, respectively showing a band gap value of 2 eV. The HOMO and LUMO energy levels of PPAD, measured from CV and they are at −6.02 eV and −3.69 eV, respectively, corresponding to band gap of 2.33 eV.…”

Section: Resultsmentioning

confidence: 99%

“…PPAL was synthesized by following the same procedure. [18] PPAD was synthesized by the same procedure. The 1 H NMR spectrum (Figure S1, Supporting Information) (DMSO-d 6 , 500 MHz) of PPAD exhibits a peak at ppm: 8…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

Parity Violation in Supramolecular Aggregation: Insights from Optoelectronic Properties

Chal

Shit

Nandi

2019

Macromolecular Symposia

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In the contemporary science, it is believed that supramolecular chiral structures (left‐ or right‐handed) emanating from enantiomeric (L‐ or D‐enantiomers) chiral building blocks would have identical physical and chemical properties. Here, PBI derivatives with chiral L‐phenylalanine and D‐phenylalanine at the imide positions have been synthesized and designated as PPAL and PPAD. Surprisingly, the chiral perylenebisimide (PBI) derivatives containing PPAL and PPAD self‐assemble to mirror image helical supramolecular structures showing dissymmetric energy states. They also exhibit different optoelectronic characteristics in the supramolecular aggregated state in chlorinated solvents. These studies indicate parity violation in supramolecular aggregated state and it may provide great impetus in understanding the origin of the evolutionary conserved L‐amino acids in nature.

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“…Since dealing with conductive polymers, the commonly used [Fe(CN) 6 ] 3− /[Fe(CN) 6 ] 4− solution gave rise to a narrow impedance spectrum with barely appreciable differences among the species. On the contrary, by adopting PBS 1X solution, we were able to measure the spectra shown in Figure , from which impedance of the order of kΩs are observable as a consequence of the tiny values of current brought by PBS solution . Due to its poor conductive properties, DNA is not included in Figure since its impedance is very large and, hence, out of scale.…”

Section: Resultsmentioning

confidence: 99%

“…On the contrary, by adopting PBS 1X solution, we were able to measure the spectra shown in Figure 5, from which impedance of the order of kΩs are observable as a consequence of the tiny values of current F I G U R E 5 Nyquist plots for PANI-ES, PANI, and pDANI. The lines express fitting results for corresponding EIS data, and the inset gives the equivalent circuit which includes the impedance characteristic of the electrodes described by the charge transfer resistance (R ct ), solution resistance (R s ) and double layer capacitance (C dl ) brought by PBS solution [46,47]. Due to its poor conductive properties, DNA is not included in Figure 5 since its impedance is very large [48] and, hence, out of scale.…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Green synthesis of conductive polyaniline by Trametes versicolor laccase using a DNA template

Giacobbe

Pezzella

Ventura

et al. 2019

Engineering in Life Sciences

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The green synthesis of highly conductive polyaniline by using two biological macromolecules, i.e laccase as biocatalyst, and DNA as template/dopant, was achieved in this work. Trametes versicolor laccase B (TvB) was found effective in oxidizing both aniline and its less toxic/mutagenic dimer N‐phenyl‐p‐phenylenediamine (DANI) to conductive polyaniline. Reaction conditions for synthesis of conductive polyanilines were set‐up, and structural and electrochemical properties of the two polymers were extensively investigated. When the less toxic aniline dimer was used as substrate, the polymerization reaction was faster and gave less‐branched polymer. DNA was proven to work as hard template for both enzymatically synthesized polymers, conferring them a semi‐ordered morphology. Moreover, DNA also acts as dopant leading to polymers with extraordinary conductive properties (∼6 S/cm). It can be envisaged that polymer properties are magnified by the concomitant action of DNA as template and dopant. Herein, the developed combination of laccase and DNA represents a breakthrough in the green synthesis of conductive materials.

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Engineering of modular organic photovoltaic devices with dye sensitized architecture

Abstract: Dye sensitized organic solar cells based on citric acid doped PANI–perylenetetracarboxyldiimide exhibit a moderate efficiency of 4.32%.

Cited by 9 publications

References 53 publications

Amino Acid Based Self‐assembled Nanostructures: Complex Structures from Remarkably Simple Building Blocks

Amino Acid Based Self‐assembled Nanostructures: Complex Structures from Remarkably Simple Building Blocks

Parity Violation in Supramolecular Aggregation: Insights from Optoelectronic Properties

Green synthesis of conductive polyaniline by Trametes versicolor laccase using a DNA template

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