Self-assembly of perylenediimide based semiconductor on polymer substrate

Wiatrowski, M.; Dobruchowska, Ewa; Maniukiewicz, Waldemar; Pietsch, U.; Kowalski, J.; Szamel, Zbigniew; Ulański, Jacek

doi:10.1016/j.tsf.2009.08.037

Cited by 24 publications

(15 citation statements)

References 29 publications

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“…Lower ratios formed a bilayer type morphology which frequently occurs when compounds with stronger molecule-to-molecule than molecule-to-substrate interactions tend to separate at the upper layer of the blend film, while the compound which preferentially absorbs to the substrate forms the bottom layer. [26][27][28] However, in our work, the NDI-C9 molecules assembled into ca. 0.8 mm small domains with many grain boundaries and discontinuities between each other ( Fig.…”

Section: Resultscontrasting

confidence: 58%

Ultrathin film heterojunctions by combining solution processing and sublimation for ambipolar organic field-effect transistors

et al. 2018

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Section: Resultscontrasting

confidence: 58%

Ultrathin film heterojunctions by combining solution processing and sublimation for ambipolar organic field-effect transistors

et al. 2018

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“…2) and AFM height images (Fig. Moreover, two weakened diffraction rings corresponding to the (004) and (211) planes of EP-PDI in the SAED patterns 34,35 indicate that the crystallinity of EP-PDI was decreased after employing type (II) SAs. Apparently, EP-PDI molecules prefer to form aggregation rather than completely mix in the PTB7 phase, thus resulting in large scale phase separation.…”

Section: Reducing the Aggregation Of Ep-pdi Domains And Increasing Thmentioning

confidence: 98%

Achieving balanced intermixed and pure crystalline phases in PDI-based non-fullerene organic solar cells via selective solvent additives

Liu

Cao

et al. 2014

Phys. Chem. Chem. Phys.

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Herein, balanced intermixed and pure crystalline phases in N,N'-bis(1-ethylpropyl)-perylene-3,4,9,10-tetracarboxylic diimide (EP-PDI)-based non-fullerene organic solar cells (OSCs) were achieved via selective solvent additives (SAs). Poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]] (PTB7) and 7,7'-(4,4-bis(2-ethylhexyl)-4H-silolo[3,2-b:4,5-b']dithiophene-2,6-diyl)bis(6-fluoro-4-(5'-hexyl-[2,2'-bithiophen]-5-yl)benzo[c][1,2,5]thiadiazole) (F-DTS) possessing different compatibilities with EP-PDI were selected as model systems to investigate the guideline of SAs selection for different non-fullerene-based systems. According to the solubility parameter difference (Δδ) between EP-PDI and SAs, five different SAs were divided into two types: (I) strong intermolecular interactions with EP-PDI molecules (with Δδ values less than 5 MPa(1/2)), (II) weak intermolecular interactions with EP-PDI molecules (with large Δδ values). For PTB7:EP-PDI system with large and obvious phase separation, the introduction of type (II) SAs provided extra interactions with EP-PDI molecules, thus effectively reducing EP-PDI aggregate domains and increasing intermixed fractions. The incorporation of type (II) SAs resulted in a greater yield of dissociated polarons, and the final device efficiency increased from 0.02% to 1.65%. On the contrary, for finely mixed F-DTS:EP-PDI systems, type (I) SAs were considerably more effective because of the fact that the required pure crystalline phases were readily induced by the unfavorable interactions. The charge transport pathways optimized by type (I) SAs improved device efficiency from 0.18% to 2.82%. Hence, by processing selective SAs, the fraction of intermixed and pure crystalline phases for PDI-based non-fullerene OSCs can be well regulated; therefore, the final performance for both systems can be significantly improved.

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“…[12,13] The aggregate morphology andc rystal structure can also be controlled. [14][15][16][17][18][19][20][21][22] PDIs can interactt oc reate chiral or helical structures, [23] wires, [20,24] "fish-tail" structures, [25] liquid crystal phases, [26] self-assembled mixed aggregates, [27][28][29] and crystallites of varying degrees of disorder. [30,31] These molecular morphologyand electronic modificationshave facilitated many potential materials applications.…”

Section: Introductionmentioning

confidence: 99%

Improving the Quantum Yields of Perylene Diimide Aggregates by Increasing Molecular Hydrophobicity in Polar Media

Austin

Mylon

et al. 2017

ChemPhysChem

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Here we report the quantum yield of four aggregated perylene diimide (PDI) species that vary by the length of the branched side chains attached at the N,N' imide positions. The PDI molecules were dissolved in binary water:methanol solvents as a means to vary the solvent polarity and control the degree of aggregation in solution. By performing spectroscopy, kinetics, and light scattering experiments, the nature of the molecular interactions in the solutions was determined. The maximum quantum yield of the aggregated molecules increased from 0.04 for the shortest chain molecule (B2) to 0.20 for the largest chain molecule (B13). The higher quantum yield of B13 compared with B2 correlates well with an increase in the fluorescence lifetime. The monomer emission lifetime was 4.8 ns whereas a lifetime as high as 21.2 ns was measured for the B13 aggregate fluorescence. A shorter sub-nanosecond lifetime was also measured for suspended colloids in B5, B9, and B13. The enhanced quantum yield is attributed to an increase of disorder in the B13 aggregates. As the polarity of the solution increases, the hydrophobic effect further enhances the disorder, and, therefore, the quantum yields in these particles.

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Self-assembly of perylenediimide based semiconductor on polymer substrate

Cited by 24 publications

References 29 publications

Ultrathin film heterojunctions by combining solution processing and sublimation for ambipolar organic field-effect transistors

Ultrathin film heterojunctions by combining solution processing and sublimation for ambipolar organic field-effect transistors

Achieving balanced intermixed and pure crystalline phases in PDI-based non-fullerene organic solar cells via selective solvent additives

Improving the Quantum Yields of Perylene Diimide Aggregates by Increasing Molecular Hydrophobicity in Polar Media

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