Superstrate CuInS2 solar cells fabricated by spray-pyrolysis methods

Author

Nguyen, D.C. ; Ryo, T. ; Ito, S.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Univ. of Hyogo, Himeji, Japan

fYear

2011

fDate

19-24 June 2011

Abstract

CuInS₂ (CIS) films were deposited on In₂S₃/TiO₂/FTO/glass under air by spray pyrolysis, resulting in superstrate-structured solar cells. We found the significant difference of images between SEM and optical microscope, which suggests crystallization of spray-pyrolysis CIS particles in In₂S₃ layer. The In₂S₃ covering layer was confirmed by Auger Electron spectroscopy. Titanium-doping in In₂S₃ improved fill factor of CIS cells, however, the conversion efficiency was not changed. The best cells were achieved at 4 % sodium doping using 350 °C hot-plate and their cell parameters are open-circuit voltage = 0.551 V, photocurrent density = 11.65 mA/cm², fill factor = 0.45, and a conversion efficiency = 2.88%.

Keywords

Auger electron spectroscopy; copper compounds; crystallisation; indium compounds; optical microscopy; photoconductivity; pyrolysis; semiconductor doping; semiconductor thin films; sodium; solar cells; spray coatings; ternary semiconductors; titanium; Auger electron spectroscopy; CuInS₂; In₂S₃-TiO₂-SnO₂:F-SiO₂; SEM; cell parameters; conversion efficiency; fill factor; hot plate; open circuit voltage; optical microscope; photocurrent density; sodium doping; spray pyrolysis CIS particle crystallisation; superstrate-structured solar cell; thin film deposition; titanium doping; Copper; Films; Photoconductivity; Photovoltaic cells; Scanning electron microscopy; Surface morphology; Surface treatment;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialists Conference (PVSC), 2011 37th IEEE

Conference_Location

Seattle, WA

ISSN

0160-8371

Print_ISBN

978-1-4244-9966-3

Type

conf

DOI

10.1109/PVSC.2011.6186522

Filename

6186522