Improved fabrication method for kesterite thin-film solar cells may widen their use

March 11, 2011
Thin-film solar cells made from copper-zinc-tin-chalcogenide kesterites are not only efficient (up to about 10%), but low in cost too.

Luxembourg City, Luxembourg--Thin-film solar cells made from copper-zinc-tin-chalcogenide kesterites are not only efficient (up to about 10%), but low in cost too. This is because all the raw materials needed to fabricate them are cheap and abundant.

One barrier to the wider use of these kesterites for thin-film photovoltaics is unwanted loss of tin from the thin film during fabrication at elevated temperatures, which ruins the ability to precisely control the film composition and homogeneity.

Simpler precursor film

Researchers at the Université du Luxembourg have overcome this problem by learning more about the reactions occurring during formation of the thin-film material.1 As an added benefit, they have figured out how to begin the manufacturing process with a precursor film of only copper and zinc, rather than a film containing all four materials. This allows the addition of the other materials during fabrication to be simplified, as material proportions become much easier to monitor.

"With this first success, we are now able to understand the further limitations of these solar cells," says Susanne Siebentritt, head of the Laboratory for Photovoltaics. "This will help us to improve the efficiency further."

The Laboratory for Photovoltaics of the University of Luxembourg is a group of researchers developing new materials and processes for solar cells. The laboratory focuses also on furthering the physical understanding of the materials and interfaces involved in these solar cells.

REFERENCE:

1. Alex Redinger et al., J. Am. Chem. Soc., 133 (10), p. 3320 (2011); Publication Date (Web): February 18, 2011.

Follow us on Twitter

Subscribe now to Laser Focus World magazine; it’s free!

About the Author

John Wallace | Senior Technical Editor (1998-2022)

John Wallace was with Laser Focus World for nearly 25 years, retiring in late June 2022. He obtained a bachelor's degree in mechanical engineering and physics at Rutgers University and a master's in optical engineering at the University of Rochester. Before becoming an editor, John worked as an engineer at RCA, Exxon, Eastman Kodak, and GCA Corporation.

Sponsored Recommendations

Request a quote: Micro 3D Printed Part or microArch micro-precision 3D printers

April 11, 2024
See the results for yourself! We'll print a benchmark part so that you can assess our quality. Just send us your file and we'll get to work.

Request a free Micro 3D Printed sample part

April 11, 2024
The best way to understand the part quality we can achieve is by seeing it first-hand. Request a free 3D printed high-precision sample part.

How to Tune Servo Systems: The Basics

April 10, 2024
Learn how to tune a servo system using frequency-based tools to meet system specifications by watching our webinar!

Precision Motion Control for Sample Manipulation in Ultra-High Resolution Tomography

April 10, 2024
Learn the critical items that designers and engineers must consider when attempting to achieve reliable ultra-high resolution tomography results here!

Voice your opinion!

To join the conversation, and become an exclusive member of Laser Focus World, create an account today!