Structure and Solar Conversion Efficiency of Zinc Selenide Thin Film Solar Cell

• Main Authors: Liao, Yu-Hsuan, 廖于萱
• Other Authors: Jian, Wen-Bin
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/u9v36a

碩士 === 國立交通大學 === 電子物理系所 === 105 === The solar cell technology is one of the renewable energy technologies that shall be continuously developed because of limited resources of fossil fuels, resulting in energy crisis. The solar cell technology has grown rapidly over the years. Solar cell is a device that can convert the solar energy into electricity by photovoltaic effects. In this work, thin films of ZnSe/n-type GaAs are used for solar cell characterizations. This report is divided into five parts. In the first part, we study the interfacial effects between Ti and ZnSe and between Ti and Cl-doped ZnSe. In the second part, we discuss the phenomenon and mechanism of photocurrent at zero-bias and solar cell conversion efficiency between ZnSe grown on the two different substrates of GaAs and n-type GaAs. In the third part, we measure and compare the conversion efficiency among the ZnSe/n-type GaAs, Cl-doped ZnSe/n-type GaAs, and CdSe quantum dot embedded Cl-doped ZnSe/n-type GaAs. In the fourth part, we study the electrical properties and conversion efficiencies in the temperature range from 120 K to 300 K. In the last part of this report, we try to study the windowing effect of the Ti electrodes because the solar energy conversion relies on the interface of Ti/ZnSe. To solve this problem, we use an electron beam lithography and a thermal evaporation system to manufacture mesh-shaped electrodes on ZnSe surface. We observed an increase of energy conversion efficiency when windows for light exposures are opened on the Ti electrodes.