CIGS solar cells with very thin absorber layers

Author

Haug, Veronika ; Quintilla, Aina ; Ahlswede, Erik

Author_Institution

Zentrum fur Sonnenenergie- und Wasserstoff-Forschung (ZSW), Stuttgart, Germany

fYear

2009

fDate

7-12 June 2009

Abstract

An additional carbon layer between Cu(In,Ga)Se₂ (CIGS) layer and molybdenum (Mo) back contact can increase the efficiency of solar cells with very thin absorber layers. In this study the so produced solar cells co-evaporated on top of a carbon layer are compared with cells co-evaporated directly on molybdenum. We found that the carbon layer leads to higher maximum current densities and higher maximum open-circuit voltages and thus higher maximum efficiencies (6.0% with carbon layer compared to 5.6% without for 250 nm CIGS thickness).

Keywords

carbon; copper compounds; current density; evaporation; gallium compounds; indium compounds; molybdenum; solar cells; ternary semiconductors; C-Mo; CIGS solar cells; CuInGaSe₂; Mo; additional carbon layer; current densities; molybdenum back contact; open circuit voltages; solar cells co-evaporation; thin absorber layers; Data analysis; Degradation; Energy measurement; Photovoltaic cells; Photovoltaic systems; Power measurement; Silicon; Solar power generation; System testing; Transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialists Conference (PVSC), 2009 34th IEEE

Conference_Location

Philadelphia, PA

ISSN

0160-8371

Print_ISBN

978-1-4244-2949-3

Electronic_ISBN

0160-8371

Type

conf

DOI

10.1109/PVSC.2009.5411171

Filename

5411171