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We propose a new concept of the vertical exciplex-type organic light emitting structure with multilevel metallization that can serve as light-to-electricity-to-light convertor. The superimposition of operation and control voltages allows to tune the spectrum of the emitted light from blue to green, which is achieved by varying the potential applied to the device terminals or by illuminating the integrated organic Schottky diode employing a near-infrared absorbing titanyl phthalocyanine (TiOPc) dye. [ABSTRACT FROM AUTHOR]

We have found that the structures based on ITO/tri(9-hexylcarbazol-3-yl)amine/Ca/Al fabricated by means of vacuum deposition generate acoustic oscillations when pulse voltage is applied. Impedance spectroscopy study indicates the presence of significant inductive response, which is the result of significant energy barriers at the semiconductor-metal interface. We assume that a very heterogeneous spatial distribution of the electric field at the organic/metal interface and the noncoplanarity of the molecules cause the electrostriction effect in the structures. [ABSTRACT FROM PUBLISHER]