The investigation of optimal Si-Sigh hetero-stucture thin-film solar cell with theoretical calculation and quantitative analysis
Journal
IEEE Photovoltaic Specialists Conference
Pages
2848-2852
Date Issued
2010
Author(s)
Abstract
The device performance such as short circuit current density (Jsc) , open-circuit voltage (Voc) , fill factor (FF), and efficiency of solar cells on the multi-crystalline SiGe on the Si with different Ge concentration are compared and investigated in this work. The average Ge concentration was systematically changed in the range from 0% to 30%. The appropriate addition of Ge in crystal Si is the effective way to increase the short circuit current density without affecting the open-circuit voltage, due to the modulation of the material energy band-gap. The band-gap of the SiGe can be extracted by Electron-Hole Plasma (EHP) model at different temperatures. With the optimization of Ge concentration and clean process condition, the overall efficiency of a Si0.9Ge0.1based solar cell is found to be improved about ∼4% than the control mc-Si solar cell. Moreover, the SiGe based solar cell has also been observed that it has less operated temperature sensitivity than Si solar cell for the real application. The theoretical calculation and simulation work help us to understand and engineer the high-efficiency SiGe solar cell qualitatively. © 2010 IEEE.
SDGs
Other Subjects
Band gaps; Clean process; Device performance; Electron hole plasma; Energy bandgaps; Fill factor; Ge concentrations; High efficiency; Overall efficiency; Quantitative analysis; Real applications; Si solar cells; Temperature sensitivity; Theoretical calculations; Thin-film solar cells; Germanium; Open circuit voltage; Optimization; Photovoltaic effects; Silicon; Silicon alloys; Silicon solar cells; Solar cells
Type
conference proceedings