Characterization of the MgO/GaSe0.5S0.5 Heterojunction Designed for Visible Light Communications

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dc.contributor.authorQasrawi, Atef F.
dc.date.accessioned2018-01-23T21:36:16Z
dc.date.available2018-01-23T21:36:16Z
dc.date.issued2015-04-21
dc.description.abstractIn this study an optoelectronic design is reported and characterized. The device is made of p-type MgO solved in sodium silicate binder and n-type GaSe0.5S0.5 heterojunction. It is described by means of X-ray diffraction, optical absorption and reflection in the incident light wavelength range of 190-1100 nm and by means of dark and 406 nm laser excited current (I)-voltage (V) characteristics. The optical reflectance was also measured as a function of angle of incidence of light in the range of 35-80o. The structural analysis revealed no change in the existing phases of the device composers. In addition, it was observed that for pure sodium silicate and for a 67% content of MgO solved in sodium silicate binder (33%), the heterojunction exhibits a valence band splitting of 0.45 and 0.70 eV, respectively. The painting of MgO improved the light absorbability significantly. On the other hand, the angle-dependent reflectance measurements on the crystal displayed a Brewster condition at 70o. The MgO/ GaSe0.5S0.5 heterojunction exhibited no Brewster condition when irradiated from the MgO side. Moreover, for the crystal and the MgO/GaSe0.5S0.5 heterojunction, the dielectric spectral analysis revealed a pronounced increase in the quality factor of the device. The I V characteristics of the device revealed typical optoelectronic properties with high photoresponse that could amplify the dark current 24 times when irradiated with 5 mW power laser light. The structural, optical, dielectric and electrical features of the MgO/GaSe0.5S0.5 heterojunction nominate it for use in visible light communication technologyen_US
dc.identifier.urihttps://hdl.handle.net/20.500.11888/12947
dc.language.isoenen_US
dc.subjectOptical materialsen_US
dc.subjectHeterojunctionen_US
dc.subjectImpedance spectroscopyen_US
dc.subjectMicrowaveen_US
dc.titleCharacterization of the MgO/GaSe0.5S0.5 Heterojunction Designed for Visible Light Communicationsen_US
dc.typeArticleen_US
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The Eighth Palestinian International Chemistry Conference (PICC 2015) "Chemical Sciences Towards Knowledge Based Economy "