Effect of pH level and deposition time on the formation of zinc oxide microspheres on silicon (100) fabricated by chemical bath deposition
Date
10-2011
Degree
Bachelor of Science in Applied Physics
College
College of Arts and Sciences (CAS)
Adviser/Committee Chair
Alexandra B Santos
Committee Member
Darwin B Putungan
Abstract
Zinc oxide (ZnO) microspheres were fabricated by chemical bath deposition on Silicon (100) substrate using Zinc chloride (ZnC12) and Carbamide ((NH2)2C0) as the starting materials. The solution for bath deposition was composed of 1.0 M (NH2)2C0 and 0.05 M of ZnC12. The pH level of each of the solution was varied (pH=3,4 and 5) by adding Hydrochloric acid (HCI). The substrates were then placed on the solutions which were kept at 80°C for 3, 6 and 24 hrs deposition times. The deposits were transformed into ZnO by heating it at 300°C for 30 mins. The structural and morphological properties of deposits were investigated using XRD and SEM, respectively. The XRD confirmed the crystalline structure of the deposit as ZnO with one significant peak at (201) plane for all pH levels under study. SEM images showed that ZnO microspheres were formed at pH 4 and pH 5 while irregularly shaped ZnO were formed at pH 3. The mean diameter of ZnO microspheres of pH 3 is significantly less than of the mean diameters of pH 4 and of pH 5 which are equal. On the other hand, the mean diameter of the ZnO microspheres increases as the deposition time increases.
Language
English
Location
UPLB Main Library Special Collections Section (USCS)
Call Number
Thesis
Recommended Citation
De Castro, Ariane Paola D., "Effect of pH level and deposition time on the formation of zinc oxide microspheres on silicon (100) fabricated by chemical bath deposition" (2011). Undergraduate Theses. 10374.
https://www.ukdr.uplb.edu.ph/etd-undergrad/10374
Document Type
Thesis