Exciplex Electroluminescence Spectra of the New Organic Materials Based on Zinc Complexes of Sulphanylamino-Substituted Ligands

Exciplex Electroluminescence of the New Organic Materials for Light-Emitting Diodes

“…For the zinc-chelate complexes with sulphanilamino-substituted ligands, the exciplex longwave bands were observed in the PL spectra of their blends with hole-transporting materials by Kaplunov et al [44][45]. It was shown previously that the PL spectra taken from the layered structure exhibiting the exciplex EL OLEDs do not contain long-wave bands but only the intrinsic bands of components [46].…”

“…Kaplunov et al [44] studied the PL spectra of the films containing blends of Zn(DFP-SAMQ)2 with PTA. The spectra contain no intrinsic luminescence of zinc complex or PTA and exhibit only the exciplex band with maximum at 555 nm ( figure 5, curve 4).…”

“…Methods of preparing the devices and measuring their properties are described elsewhere [42][43][44]. Materials of hole-transporting layer were triaryl derivatives: PTA, olygomer of triphenylamine with high glass-transition temperature [48] and a well-known N,N'-bis(1-naphthyl)-(1,1'-biphenyl)-4,4'-diamine (NPD).…”

“…Recently, spectral properties of the electroluminescent devices based on the novel zincchelate complexes of sulphanilamino-substituted quinolines and benzothiazoles were investigated and some exciplex phenomena were found [41][42][43][44][45][46]. The structures of zinc complexes are shown in Figure 1.…”

The Electroluminescence Spectra of Light-Emitting Devices Based on Zinc Complexes of Amino-Substituted Ligands

“…Recently, the emission spectra of electroluminescent devices based on the new zinc complexes of amino-substituted benzothiazoles and quinolines containing the C-N-M-N chains in their chelate cycles were investigated [1][2][3]. The electroluminescence (EL) spectra exhibit strong exciplex bands in the green to yellow region 540 to 590 nm due to the interaction of the excited states of zinc complexes and triaryl molecules of a hole-transporting layer.…”