Date of Graduation
Doctor of Philosophy in Engineering (PhD)
Second Committee Member
Third Committee Member
Investigation of renewable energy resources is gaining huge momentum in recent years due to the limited fossil fuels, and their detriment impact on the environment. Solar energy is promising to meet the increased energy demand. In order to achieve this goal, solar energy has to be harvested efficiently at low cost. Therefore, higher efficiency solar cells are the primary focus of research worldwide. Photovoltaics based on InAs/GaAs intermediate band solar cells and their device performance enhancements are investigated in this dissertation. The device enhancement is carried out by surface modification methods. The dissertation work is inspired by the need of improved efficiency solar cells to meet the new energy demands. In this project, InAs/GaAs intermediate band solar cell and their device performance enhancement are investigated. The device enhancement is carried out though implementing surface modification by using plasmonic effect, anti-reflection coatings and self-cleaning surfaces. Single junction and quantum dots solar cells performance has been unsatisfying due to several optical losses especially high surface reflection. Hence, in this project, potential application of plasmonic effect and significant device performance enhancement implementing anti-reflection coating are studied experimentally. Significantly, GaAs based photovoltaics solar cells efficiencies were improved by 40 - 50 %. In addition, self-cleaning surfaces with contact angle above 156o has been achieved. This self-cleaning surface can ensure proper functionality of the anti-reflection coatings.
Makableh, Yahia Fayiz, "Enhancement of the Performance of GaAs based Solar Cells by using Plasmonic, Anti-Reflection Coating and Hydrophobic Effects" (2015). Theses and Dissertations. 1123.