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Deanship of Graduate Studies
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 Type
Dr Grade
Email
نورة عبدالعزيز الصايغ
Alsayegh, Norah Abdulaziz
Researcher
Doctorate
Files
File Name
Type
Description
49122.pdf
pdf
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