Spectroscopic properties of diketopyrrolopyrrole derivatives with long alkyl chains

Barszcz, Bolesław; Kędzierski, Kamil; Jeong, Hee Yeon; Kim, Tae‐Dong

doi:10.1016/j.jlumin.2017.01.019

Cited by 15 publications

(10 citation statements)

References 37 publications

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“…Although they do not appear very sharp, excitation energies varying from E ex = 0.17 eV to 0.28 eV can be estimated. For similar polymers Barszcz et al [48] identified the C-C stretching vibration of thiophene rings at ≈0.173 eV and the in-phase C=C stretching of the DPP core at ≈0.2 eV. Similar results have been presented by Adil et al [49], Francis et al [50] and Dorfner et al [51].…”

Section: Resultssupporting

confidence: 64%

Charge transport in single polymer fiber transistors in the sub-100 nm regime: temperature dependence and Coulomb blockade

Lenz¹,

Statz²,

Watanabe³

et al. 2022

J. Phys. Mater.

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Even though charge transport in semiconducting polymers is of relevance for a number of potential applications in (opto-)electronic devices, the fundamental mechanism of how charges are transported through organic polymers that are typically characterized by a complex nanostructure is still open. One of the challenges which we address here, is how to gain controllable experimental access to charge transport at the sub 100 nm lengthscale. To this end charge transport in single poly(diketopyrrolopyrrole-terthiophene) (PDPP) fiber transistors, employing two different solid gate dielectrics, a hybrid Al2O3/self-assembled monolayer (SAM) and hexagonal boron nitride (hBN), is investigated in the sub 50 nanometer regime using electron-beam contact patterning. The electrical characteristics exhibit near ideal behavior at room temperature which demonstrates the general feasibility of the nanoscale contacting approach, even though the channels are only a few nanometers in width. At low temperatures, we observe nonlinear behavior in the current-voltage characteristics in the form of Coulomb diamonds which can be explained by the formation of an array of multiple quantum dots at cryogenic temperatures.

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Section: Resultssupporting

confidence: 64%

Charge transport in single polymer fiber transistors in the sub-100 nm regime: temperature dependence and Coulomb blockade

Lenz¹,

Statz²,

Watanabe³

et al. 2022

J. Phys. Mater.

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“…This type of phenomenon has been reported and validated by complementary techniques (timeresolved fluorescence spectroscopy and transient absorption spectroscopy) for other DPP derivatives that show a good π overlap of the electron rich (thiophene or phenyl) and electron poor (DPP) parts in their structure. 15,24 For instance, Mauck et al showed that such strong intermolecular couplings lead to a charge transfer (CT) that can impacts the singlet exciton fission rate. 25 Many authors, including Spano and co-workers, 26 and Hoffman and co-workers, 8a…”

Section: Discussionmentioning

confidence: 99%

Tuning crystallochromism in diketopyrrolopyrrole-co-thieno[3,2-b]thiophene derivatives by the architecture of their alkyl side chains

et al. 2018

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“…Here, we can mention only a few theoretical works devoted to structural, electronic and CT properties of DPP with thiophene or furan flanks . As an auxiliary method, the modeling usually supports the experiment with a “standard analysis” of conjugated backbones such as ground state geometries, frontier molecular orbitals, optical and electronic band gaps, torsion potentials, and less often excited states . For instance, Wang et al have investigated a series of conjugated dyes based on DPP with different aromatic flanks using density functional theory (DFT) and time‐dependent‐DFT to evaluate the properties and to improve the solar cell performance of the materials under study.…”

Section: Introductionmentioning

confidence: 99%

A comparative analysis of symmetric diketopyrrolopyrrole‐cored small conjugated molecules with aromatic flanks: From geometry to charge transport

et al. 2018

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Diketopyrrolopyrrole (DPP) derivatives are promising compounds for application in organic electronics. Here, we investigate several symmetrical N‐unsubstituted and N‐methyl substituted DPPs which differ in the heteroatom in the aromatic flanks. The conformational, electronic, and optical properties are characterized for single molecules in vacuum or a solvent. The intermolecular interactions are evaluated for interacting dimers. Here, a number of stacking geometries is tested, and dimers with mutual orientation of the molecules corresponding to the minimal binding energies are determined. The predicted charge carrier mobilities for stacks having minimal binding energies corroborate experimentally measured values. We conclude that DFT prediction of such stacks is a promising and computationally inexpensive approach to a rough estimation of transport properties. Additionally, the super‐cell of the experimentally resolved crystal structure is used to study the dynamics and to compute the charge transport along the hopping pathways. We discuss obtained high mobilities and relate them to the symmetry of DPP core. © 2018 Wiley Periodicals, Inc.

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Spectroscopic properties of diketopyrrolopyrrole derivatives with long alkyl chains

Cited by 15 publications

References 37 publications

Charge transport in single polymer fiber transistors in the sub-100 nm regime: temperature dependence and Coulomb blockade

Charge transport in single polymer fiber transistors in the sub-100 nm regime: temperature dependence and Coulomb blockade

Tuning crystallochromism in diketopyrrolopyrrole-co-thieno[3,2-b]thiophene derivatives by the architecture of their alkyl side chains

A comparative analysis of symmetric diketopyrrolopyrrole‐cored small conjugated molecules with aromatic flanks: From geometry to charge transport

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