Incoherent Interplane Conductivity of kappa-(BEDT-TTF)2Cu[N(CN)2]Br

The interplane optical spectrum of the organic superconductor kappa-(BEDT-TTF)2Cu[N(CN)2]Br was investigated in the frequency range from 40 to 40,000 cm-1. The optical conductivity was obtained by Kramers-Kronig analysis of the reflectance. The absence of a Drude peak at low frequency is consistent with incoherent conductivity but in apparent contradiction to the metallic temperature dependence of the DC resistivity. We set an upper limit to the interplane transfer integral of tb = 0.1 meV. A model of defect-assisted interplane transport can account for this discrepancy. We also assign the phonon lines in the conductivity to the asymmetric modes of the ET molecule.Comment: 7 pages with embedded figures, submitted to PR

Exciplex electroluminescence spectra of the new organic materials based on zinc complexes of sulphanylamino-substituted ligands

Electroluminescence spectra of the devices based on the new zinc complexes of amino-substituted benzothiazoles and quinolines containing C-N-M-N chains in their chelate cycles have been investigated. The obtained spectra exhibit strong exciplex bands in green-yellow region 540-590 nm due to interaction of the excited states of zinc complexes and triarylamine molecules of hole-transporting layer. For some devices the intrinsic luminescence band in blue region 460 nm is also observed along with the exciplex band that results in almost white color of the device emission. The exciplex band can be eliminated if the material of the hole-transporting layer is not triarylamine derivative

Electroluminescence and photosensitivity spectra of organic diode structures based on zinc complexes

Devices based on zinc complexes with sulphanylaminosubstituted ligands are characterized by dual function – electroluminescence (EL) and photosensitivity. Both EL and photosensitivity are associated with the formation of exciplexes

Electroluminescence and photosensitivity spectra of organic diode structures based on zinc complexes

Devices based on zinc complexes with sulphanylaminosubstituted ligands are characterized by dual function – electroluminescence (EL) and photosensitivity. Both EL and photosensitivity are associated with the formation of exciplexes