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

fYear

2012

fDate

3-8 June 2012

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE

Conference_Location

Austin, TX

ISSN

0160-8371

Print_ISBN

978-1-4673-0064-3

Type

conf

DOI

10.1109/PVSC.2012.6318219

Filename

6318219