Title :
Development of high-efficiency tandem silicon solar cells on W-textured Zinc oxide-coated soda-lime glass substrates
Author :
Moriya, Yuki ; Krajangsang, Taweewat ; Sichanugrist, Porponth ; Konagai, Makoto
Author_Institution :
Dept. of Phys. Electron., Tokyo Inst. of Technol., Tokyo, Japan
Abstract :
In this study, we have investigated the effect of refractive index of Soda-lime glass (SLG) substrates on its surface roughness after being etched by Reactive Ion Etching (RIE). It was found that there was a relationship between the refractive index of the glass and etched surface roughness. Higher roughness was obtained on SLG with lower refractive index. Based on this finding, we can easily control the glass etching process and achieve its good repeatability. Furthermore, ZnO films have been deposited on this etched SLG to achieve W-textured TCO substrates. As a result, a-Si:H/μc-Si:H tandem solar cell fabricated on this developed substrate has a high efficiency of 12.40% showing that this new morphology control of glass etching is a promising method for development of high-efficiency thin-film solar cell.
Keywords :
etching; glass; silicon; solar cells; zinc compounds; RIE; SLG; Si; W-textured zinc oxide-coated soda-lime glass substrates; ZnO; glass etching; high-efficiency tandem silicon solar cells development; higheffi-ciency thin-film solar cell; morphology control; reactive ion etching; refractive index effect; soda-lime glass substrates; Etching; Glass; Rough surfaces; Substrates; Surface roughness; Surface waves; Zinc oxide; Glass; amorphous materials; photovoltaic cells; silicon; surface texture;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4673-0064-3
DOI :
10.1109/PVSC.2012.6318219
