Seminário de Ótica acontece amanhã (17)
Evento será no auditório do Departamento de Física
O Departamento de Física da UFPE realiza amanhã (17), a partir das 14h, no auditório de Física, o Seminário de Ótica sobre o tema “Design, Fabrication and Characterization of ZnO Nanostructure Based Photodetectors”. O evento será ministrado pelo pós-doutorando Avishek Das.
The current research work has emphasized on optimizing the growth, design, and fabrication of ZnO nanostructure-based photodetectors by employing Chemical Bath Deposition (CBD) technique. The work includes the morphological engineering of ZnO nanostructure by tuning the CBD growth parameters. The electronic properties of single n-ZnO nanowires (NWs) /p-Si heterojunction diode-based nano-rectifier have been investigated. The effect of native defects in ZnO NWs on the heterojunction properties has been investigated and is observed to be highly temperature-dependent. The annealing effects on the defects and the relevant UV photodetection properties are studied. The overall study and subsequent observations suggest that the oxygen vacancy related defects are essential for device and UV photodetection applications with ZnO NWs. The thermal treatment of as-grown ZnO NWs is not recommended for improving UV photodetection efficiency.
Departamento de Física