Document Details

Document Type : Thesis 
Document Title :
STRUCTURAL, OPTICAL AND ELECTRICAL PROPERTIES OF K DOPED ZnO
الخصائص الكهربائية والضوئية والتركيبية للزنك اوكسيد المطعم بالبوتاسيوم
 
Subject : Faculty of Science 
Document Language : Arabic 
Abstract : ZnO is one of the most interesting semiconductor compounds due to its unique properties that make it excellent in many applications. Sol-gel method was applied for synthesize of Potassium doped ZnO NPs, using ZnCl2, KOH and KCl as starting materials. The characterization of the morphology and the structure was done by using X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman spectroscopy. UV-Visible absorption and photoluminescence spectroscopy (Pl) have also been used to investigate the optical properties. The result of XRD confirms the formation of ZnO with the hexagonal crystal structure. Also, we calculated the average crystallite size by using Scherrer equation. The morphology of ZnO was studied by SEM, which illustrated that the NPs have a hexagonal shape but in high concentrations, some particles showed a tetrahedral shape. The optical bandgap of Zn1-xKxO (x=0.01, 0.02, 0.03, 0.04, 0.10, 0.20 and 0.30) samples are greater than the bandgap of pure ZnO as shown in Uv-vis spectroscopy results. Pl results show that K-doped ZnO emission peaks shift to higher energy which is attributed to the increase of the bandgaps in K-doped ZnO NPs.. Raman studies confirm our prepared ZnO samples have hexagonal wurtzite structure. Finally, these results make K-doped ZnO NPs have good properties, make them promising for future applications specially in optoelectronic devices. 
Supervisor : Dr. Lila Abdulaziz Alkhattaby 
Thesis Type : Master Thesis 
Publishing Year : 1444 AH
2023 AD 
Added Date : Monday, March 20, 2023 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
نورة عبدالعزيز الصايغAlsayegh, Norah AbdulazizResearcherDoctorate 

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