Mehrstufige reversible Redoxsysteme, LV. Kristallstruktur des CT‐Komplexes 2,5‐Me2‐DCNQI/TTF aus N,N′‐Dicyan‐2,5‐dimethyl‐1,4‐benzochinondiimin und Tetrathiafulvalen sowie des Acceptors 2,5‐Me2‐DCNQI

Aumüller, Alexander; Erk, Peter; Hünig, Siegfried; Hädicke, Erich; Peters, Karl; Schnering, Hans Georg̀ von

doi:10.1002/cber.19911240920

Cited by 42 publications

(11 citation statements)

References 9 publications

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“…Assuming ψ = 0.3 V, and N A to be the same as the molecular density, 1.95 × 10 21 cm −3 for Cy-NDI and 2.12 × 10 21 cm −3 for DMDCNQI from the crystallographic data, 39,53 we estimate the thickness x to be in the order of 0.1 nm. This is shorter than the length of one monolayer.…”

Section: Trap Dosmentioning

confidence: 99%

Trap density of states in n-channel organic transistors: variable temperature characteristics and band transport

et al. 2013

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We have investigated trap density of states (trap DOS) in n-channel organic field-effect transistors based on N,N ’-bis(cyclohexyl)naphthalene diimide (Cy-NDI) and dimethyldicyanoquinonediimine (DMDCNQI). A new method is proposed to extract trap DOS from the Arrhenius plot of the temperature-dependent transconductance. Double exponential trap DOS are observed, in which Cy-NDI has considerable deep states, by contrast, DMDCNQI has substantial tail states. In addition, numerical simulation of the transistor characteristics has been conducted by assuming an exponential trap distribution and the interface approximation. Temperature dependence of transfer characteristics are well reproduced only using several parameters, and the trap DOS obtained from the simulated characteristics are in good agreement with the assumed trap DOS, indicating that our analysis is self-consistent. Although the experimentally obtained Meyer-Neldel temperature is related to the trap distribution width, the simulation satisfies the Meyer-Neldel rule only very phenomenologically. The simulation also reveals that the subthreshold swing is not always a good indicator of the total trap amount, because it also largely depends on the trap distribution width. Finally, band transport is explored from the simulation having a small number of traps. A crossing point of the transfer curves and negative activation energy above a certain gate voltage are observed in the simulated characteristics, where the critical VG above which band transport is realized is determined by the sum of the trapped and free charge states below the conduction band edge

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Section: Trap Dosmentioning

confidence: 99%

Trap density of states in n-channel organic transistors: variable temperature characteristics and band transport

et al. 2013

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“…Unlike the herringbone structure universally observed in BTBT derivatives, the DMeO-BTBT molecules form brickwork-like stacks similar to dimethyldicyanoquinonediimine (DMDCNQI). 25 Along the c-axis, two different layers parallel to the DMeO-BTBT planes are alternately stacked with the approximate interplanar spacing of 3.53 Å. One layer consists of parallel molecules, but the molecular long axis of another layer is tilted by 701.…”

Section: Resultsmentioning

confidence: 99%

Air-stable n-channel organic field-effect transistors based on charge-transfer complexes including dimethoxybenzothienobenzothiophene and tetracyanoquinodimethane derivatives

et al. 2016

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“…A third set of 2 1 screw axes is also generated perpendicular to the other two sets. Examples include JIXWIW 43 (Fig. 6) and SENFUM.…”

Section: Circumstances Leading To Wasted Molecular Inversionmentioning

confidence: 99%

Why do crystal structures waste molecular inversion symmetry?

Bond

2010

CrystEngComm

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Image reproduced with permission from Abbie TrewinOther articles published in this issue include:Dipyrrin based homo-and hetero-metallic infinite architectures Stéphane A. Baudron, CrystEngComm, 2010, Single-component molecular crystal structures containing centrosymmetric molecules with noncentrosymmetric crystallographic site symmetry are retrieved from the Cambridge Structural Database. The distribution amongst space group types is comparable to that for molecular crystals in general, except that there is a significant decrease in the proportion of triclinic structures. The structures are analysed in terms of the symmetrical relationships between them and some specific chemical circumstances that lead to wasted molecular inversion symmetry are identified: (1) planar centrosymmetric molecules form locally centrosymmetric pairs through face-to-face (p-p) interactions and these pairs pack through edge-to-face interactions; (2) molecules form layers that are locally centrosymmetric but the symmetry within the layers is not compatible with the symmetry of the interlayer interactions. Although the non-centrosymmetric environments of isolated centrosymmetric molecules seem to be unusual, the symmetries of the identified structural fragments and the interactions between them are quite normal. ; Fax: +45 6615 8780; Tel: +45 6550 2545 † Electronic supplementary information (ESI) available: A list of refcodes for the structures retrieved from the CSD, together with their structural classes. See

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Mehrstufige reversible Redoxsysteme, LV. Kristallstruktur des CT‐Komplexes 2,5‐Me₂‐DCNQI/TTF aus N,N′‐Dicyan‐2,5‐dimethyl‐1,4‐benzochinondiimin und Tetrathiafulvalen sowie des Acceptors 2,5‐Me₂‐DCNQI

Cited by 42 publications

References 9 publications

Trap density of states in n-channel organic transistors: variable temperature characteristics and band transport

Trap density of states in n-channel organic transistors: variable temperature characteristics and band transport

Air-stable n-channel organic field-effect transistors based on charge-transfer complexes including dimethoxybenzothienobenzothiophene and tetracyanoquinodimethane derivatives

Why do crystal structures waste molecular inversion symmetry?

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