New insights into DPP3Th and C70 based planar solar cells: A study combining DFT and experimental approach

Neto, Alfredo Leithold; Scalon, Lucas; Araujo, Luis Octavio de; Araújo, Francineide Lopes de; Spada, Edna R.; Cunha, Mariana Richelle Pereira da; Desordi, Jaqueline Cristine; Barreto, Rafael Carvalho; Macedo, Andréia G.; Faria, Roberto Mendonça; Rodrigues, Paula C.

doi:10.1016/j.matchemphys.2021.124271

Cited by 5 publications

(5 citation statements)

References 32 publications

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“…34 The contribution arising from the DPP unit can be observed in the broad low-energy shoulder (580 nm). 12,35,36 In the solid state, the spectrum changes significantly in terms of relative intensity between these bands, and the acquired PDI-DPP-PDI film absorbance spectrum presented the highest band transition around 586 nm, which has been attributed to the molecular reorganization dictated by the DPP segment. 12 These spectra also indicated a similarity in as-cast and post-SVA films, suggesting that PDI-DPP-PDI molecules present ordered solidstate morphologies in both samples, with a minor impact of SVA treatment.…”

Section: Resultsmentioning

confidence: 99%

Effects of solvent vapor annealing on the optical properties and surface adhesion of conjugated D : A thin films

Casagrande,

Júnior,

Desordi

et al. 2023

Phys. Chem. Chem. Phys.

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Section: Resultsmentioning

confidence: 99%

Effects of solvent vapor annealing on the optical properties and surface adhesion of conjugated D : A thin films

Casagrande,

Júnior,

Desordi

et al. 2023

Phys. Chem. Chem. Phys.

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“…Several acceptor molecules have been extensively studied, and among them, notable examples include diketopyrrolopyrrole (DPP), 13,14 isoindigo, 15 and benzothiadiazole (BT) derivatives 16–19 . The BT moiety has been extensively investigated because it exhibits a high quantum yield of fluorescence emission, and high chemical and thermal stability 20,21 .…”

Section: Introductionmentioning

confidence: 99%

“…This matching facilitates efficient charge transfer and increases the number of photogenerated carriers available for electrical conduction, ultimately leading to higher energy conversion efficiencies in photovoltaic cells. 12 Several acceptor molecules have been extensively studied, and among them, notable examples include diketopyrrolopyrrole (DPP), 13,14 isoindigo, 15 and benzothiadiazole (BT) derivatives. [16][17][18][19] The BT moiety has been extensively investigated because it exhibits a high quantum yield of fluorescence emission, and high chemical and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Influence of the π‐bridge and heteroatom on fluorene‐based donor‐acceptor polymers: Structure and optoelectronic properties

Pereira,

Araujo,

Daros

et al. 2023

J of Applied Polymer Sci

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Conjugated copolymers possess intriguing electronic characteristics that can be precisely modulated by manipulating their chemical structures. In this study, we explored two approaches for fine‐tuning the energy levels of these copolymers: the incorporation of heterocyclic moieties between the donor and acceptor units, and the substitution of a chalcogen atom in the acceptor unit. Specifically, we investigated the insertion of a thiophene along the polymer backbone and the replacement of sulfur with selenium in the acceptor unit. A series of copolymers were synthesized and thoroughly characterized using both experimental and theoretical methods. Partial density distribution of states analysis revealed that the inclusion of a thiophene significantly altered the HOMO level. Furthermore, the resulting Eg exhibited a decrease of approximately 0.8–0.9 eV compared to the copolymer without thiophene, indicating an enhanced planarization of the chain and increased conjugation length. Experimental data obtained from cyclic voltammetry demonstrated that both the conjugation length and the chalcogen atom in the acceptor unit played crucial roles in controlling the energy levels of the HOMO and LUMO. These findings establish a clear correlation between the chemical structure and the properties of the copolymers, demonstrating the potential for precise control and tailoring of their electronic characteristics.

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“…The development of organic electronic [1][2][3][4] has been increasing to attend the crescent demand for new technologies such as in organic solar cells (OSC), [5][6][7][8][9] field-effect transistors (FET), [10] light-emitting diodes (LEDs), [11] electrochromic devices, [12,13] and sensors. [14] Gas sensors are widely used in healthcare, [15] food quality control, [16,17] and environmental, [18,19] among others.…”

Section: Introductionmentioning

confidence: 99%

A Disposable and Noncontact Paper Breathalyzer Based on Small Conjugated Molecules/Carbon Nanotubes Electrodes

Gusso

Prado

Gavim

et al. 2022

Physica Status Solidi (a)

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Herein, N,N′‐di(decyl)‐3,4,9,10‐perylenebis(dicarboximide) (PDIC10) is first functionalized by hydrothermal synthesis method and processed onto single‐walled carbon nanotube (SWCN) electrodes and paper substrate. The PDC10/SWCN/paper device can be applied as a noncontact breathalyzer to detect and quantify ethanol alcohol and determine equivalent blood alcohol concentration (BAC). The sensing mechanism increases the electrical resistance upon ethanol alcohol (EtOH) exposition. This device allows the quantification of BAC values from 0.01% to 0.2%, with ΔR (%) of 2–25% in this range, with adequate stability operating in cycles.

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New insights into DPP3Th and C70 based planar solar cells: A study combining DFT and experimental approach

Cited by 5 publications

References 32 publications

Effects of solvent vapor annealing on the optical properties and surface adhesion of conjugated D : A thin films

Effects of solvent vapor annealing on the optical properties and surface adhesion of conjugated D : A thin films

Influence of the π‐bridge and heteroatom on fluorene‐based donor‐acceptor polymers: Structure and optoelectronic properties

A Disposable and Noncontact Paper Breathalyzer Based on Small Conjugated Molecules/Carbon Nanotubes Electrodes

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