Abstract
It is known that one factor that affects the operation of optoelectronic devices is the effective protection of the semiconductor materials against environmental conditions. The permeation of atmospheric oxygen and water molecules into the device structure induces degradation of the electrodes and the semiconductor. As a result, in this communication we report the fabrication of semiconductor membranes consisting of Magnesium Phthalocyanine-allene (MgPc-allene) particles dispersed in Nylon 11 films. These membranes combine polymer properties with organic semiconductors properties and also provide a barrier effect for the atmospheric gas molecules. They were prepared by high vacuum evaporation and followed by thermal relaxation technique. For the characterization of the obtained membranes, Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) were used to determine the chemical and microstructural properties. UV-ViS, null ellipsometry, and visible photoluminescence (PL) at room temperature were used to characterize the optoelectronic properties. These results were compared with those obtained for the organic semiconductors: MgPc-allene thin films. Additionally, semiconductor membranes devices have been prepared, and a study of the device electronic transport properties was conducted by measuring electrical current density-voltage (J-V) characteristics by four point probes with different wavelengths. The resistance properties against different environmental molecules are enhanced, maintaining their semiconductor functionality that makes them candidates for optoelectronic applications.
Highlights
Optoelectronic devices, widely used in the semiconductor industry, are sensitive to environmental conditions, and their operation is compromised
Due to drastic temperature changes during the deposition and the thermal relaxation that implies the manufacture of the membranes, the Infrared spectroscopy (IR) spectroscopy was carried out for intrinsic, doped MgPc thin films, and for the Nylon 11 membrane (Table 1)
Semiconductor membranes consisting of MgPc-allene particles dispersed in Nylon 11 were manufactured using a high vacuum evaporation technique followed by thermal relaxation
Summary
Optoelectronic devices, widely used in the semiconductor industry, are sensitive to environmental conditions, and their operation is compromised. Metallophthalocyanines (MPcs), as organic semiconductors, have shown outstanding electronic and optical properties for optoelectronic materials, which is a consequence of their electronic delocalization [1,2,3,4,5,6]. These properties include, as well, photosensitivity, flexible structural modification and strong absorbance in the 600–800 nm region [4,7,8]. It is known that the bandgap energy between HOMO
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