A D-π-A organic dye – Reduced graphene oxide covalent dyad as a new concept photosensitizer for light harvesting applications

Gatti, Teresa; Manfredi, Norberto; Boldrini, Chiara Liliana; Lamberti, Francesco; Abbotto, Alessandro; Menna, Enzo

doi:10.1016/j.carbon.2017.01.081

Cited by 27 publications

(31 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The five types of organic moieties recalling the structure of the backbone and side chains of P3HT have been covalently bound to RGO through in situ direct arylation reactions, starting from the corresponding aniline derivative in the presence of isoamyl nitrite, as reported in Section 4 (see Scheme S1, Supporting Information for a pictorial representation of the reactions), furnishing the functionalized RGO species RGO‐PhOHex, RGO‐PhOEtHex, RGO‐PhTh, RGO‐PhMeTh, and RGO‐PhBiTh. Details about the synthesis of the five aniline derivatives are given in the Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

Interfacial Morphology Addresses Performance of Perovskite Solar Cells Based on Composite Hole Transporting Materials of Functionalized Reduced Graphene Oxide and P3HT

et al. 2018

Self Cite

View full text Add to dashboard Cite

The development of novel hole transporting materials (HTMs) for perovskite solar cells (PSCs) that can enhance device's reproducibility is a largely pursued goal, even to the detriment of a very high efficiency, since it paves the way to an effective industrialization of this technology. In this work, we study the covalent functionalization of reduced graphene oxide (RGO) flakes with different organic functional groups with the aim of increasing the stability and homogeneity of their dispersion within a poly(3‐hexylthiophene) (P3HT) HTM. The selected functional groups are indeed those recalling the two characteristic moieties present in P3HT, i.e., the thienyl and alkyl residues. After preparation and characterization of a number of functionalized RGO@P3HT blends, we test the two containing the highest percentage of dispersed RGO as HTMs in PSCs and compare their performance with that of pristine P3HT and of the standard Spiro‐OMeTAD HTM. Results reveal the big influence of the morphology adopted by the single RGO flakes contained in the composite HTM in driving the final device performance and allow to distinguish one of these blends as a promising material for the fabrication of highly reproducible PSCs.

show abstract

Section: Resultsmentioning

confidence: 99%

Interfacial Morphology Addresses Performance of Perovskite Solar Cells Based on Composite Hole Transporting Materials of Functionalized Reduced Graphene Oxide and P3HT

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Reduced graphene oxide flakes have lateral dimensions between 1 and 2 µm, are constituted of few layers overlapping irregularly and have many corrugations (see refs. [53][54][55][56]).…”

Section: Methodsmentioning

confidence: 99%

Effect of different functionalized carbon nanostructures as fillers on the physical properties of biocompatible poly(l-lactic acid) composites

Vicentini

Gatti

Salerno

et al. 2018

Materials Chemistry and Physics

Self Cite

View full text Add to dashboard Cite

show abstract

“…In this study, we are using NKX 2587 which is a donor‐π acceptor (D‐π‐A) system. The D‐π‐A systems have been widely studied for their sensitizing properties . These belong to a highly advantageous class of sensitizing systems due to their high molar extinction coefficients, low cost and diversity.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Studies on the Structure, Optoelectronic and Photosensitizer Applications of NKX Class of Coumarin Dye Molecules

Manzoor

Pandith

2018

ChemistrySelect

View full text Add to dashboard Cite

Coumarin based NKX class of molecules have been recently investigated for their promising sensitizing applications in dye Sensitized Solar Cells (DSSCs). However, the various factors limiting the sensitizing properties of these molecules such as charge transport efficiency and electron back recombination still remain to be understood properly. Herein, we report a detailed theoretical study on the structural, opto‐electronic and photo‐sensitizer applications of 2‐cyano‐3‐[5‐(1, 1, 6,6‐tetramethyl‐10‐oxo‐2,3,5,6‐tetrahydro‐1H,4H,10H‐11‐oxa‐3a‐aza‐benzo[de]anthracen‐9‐yl)‐thiophen‐2‐yl]‐acrylicacid (NKX 2587) based dye molecules. Structural variation of the dye molecule through derivatization has been attempted, with the main emphasis on the minimization of the back electron recombination rates through reduced dye – I2 interaction. The optical and photovoltaic properties of these dyes were studied in terms of the key parameters like, HOMO‐LUMO energy gap, maximum absorption wavelength, λmax, light harvesting efficiency, charge injection efficiency, open voltage, reorganization energy etc. using density functional theory methods. The results reflect that the dyes with more electron withdrawing substituents exhibit lower dye – I2 interaction, thus minimizing the back recombination. Moreover, the dyes with chloro (C3), bromo (C4), iodo (C5) and cyano (C7) substituents exhibit almost double electronic injection efficiency in comparison to the parent sensitizer molecule and are hence, expected to enhance the efficiency of the DSSCs based on such systems.

show abstract

A D-π-A organic dye – Reduced graphene oxide covalent dyad as a new concept photosensitizer for light harvesting applications

Cited by 27 publications

References 55 publications

Interfacial Morphology Addresses Performance of Perovskite Solar Cells Based on Composite Hole Transporting Materials of Functionalized Reduced Graphene Oxide and P3HT

Interfacial Morphology Addresses Performance of Perovskite Solar Cells Based on Composite Hole Transporting Materials of Functionalized Reduced Graphene Oxide and P3HT

Effect of different functionalized carbon nanostructures as fillers on the physical properties of biocompatible poly(l-lactic acid) composites

Theoretical Studies on the Structure, Optoelectronic and Photosensitizer Applications of NKX Class of Coumarin Dye Molecules

Contact Info

Product

Resources

About