Rubrene molecular structures

Figure 12.1.7 The molecular structure of rubrene (5,6,11,12-tetraphenyl-naphthacene).

Fig. 53. Molecular structure of Na4(rubrene).8THF, 83, showing the nonplanar structure of the tetraanion. (Reprinted with permission from H. Bock et al., Angew. Chem. Int. Ed. Engl. 1996, 35, 631. Copyright 1996 Wiley VCH.)...

Fig. 1.17. Molecular structures oftetracene (left) and rubrene (right).

Emission characteristics of OLED with rubrene doped in Alqj emissive layer, (a) Emission spectrum and the molecular structure of rubrene. (From Ohmori, Y. et al., IEEE J. Selected Top. Quantum Electron., 10, 70,2004. With permission.) (b) Current-voltage and EL intensity-voltage characteristics of OLEDs, and (c) EL output signal at lOOMHz directly modulated by pulsed voltage application. (From Ohmori, Y. et al., IEEE. Selected Top. Quantum Electron., 10, 70, 2004. With permission.)... 

Fig. 6 Absorbance spectra for solution (dotted trace) and thin film (solid trace) samples of rubrene in the upper panel and tetracene in the lower panel. Molecular aggregation in the tetracene thin film gives rise to the splitting of its absorption bands. Inset are chemical structures for rubrene and tetracene...

FIGURE 2.1.5 Scanning tunneling microscope images of a-b facet of a thick, as-grown rubrene crystal. The herringbone molecular organization at the surface, consistent with the bulk structure (shown in the lower left corner), is evident. (From Menard, E. et al., Adv. Mater., 18, 1552, 2006.)... 

The observed anisotropy of p in rubrene can be explained qualitatively on the basis of the molecular packing in these crystals (Figure 2.1.15). Due to the cofacial orientation of molecules in the stacks along the b axis, the charge motion along the stacks is facilitated in comparison with that in the perpendicular direction. Recent calculations of the band structure of rubrene based on the methods of quantum chemistry confirmed that the value of transfer integrals reaches a maximum for the b axis [17]. For the quantitative description of the mobility anisotropy and its... 

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