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Fabrication of Cu(In,Ga)Se2 Films by a Combination of Mechanochemical Synthesis, Wet Bead Milling, and a Screen Printing/sintering Process

Published online by Cambridge University Press:  31 January 2011

Junya Kubo
Affiliation:
[email protected], Ryukoku University, Otsu, Japan
Yoshihiro Matsuo
Affiliation:
[email protected], Ryukoku University, Otsu, Japan
Takahiro Wada
Affiliation:
[email protected], Ryukoku University, Otsu, Japan
Akira Yamada
Affiliation:
[email protected], Tokyo Institute Technology, Meguro, Japan
Makoto Konagai
Affiliation:
[email protected], Tokyo Institute Technology, Meguro, Japan
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Abstract

We prepared fine Cu(In,Ga)Se2 (CIGS) powder suitable for screen printing using a mechanochemical synthesis and wet bead milling. Particulate precursors were deposited in a layer by a screen-printing technique, and the porous precursor layer was sintered into a dense polycrystalline film by atmospheric-pressure firing in an N2 gas atmosphere. The microstructure of CIGS powder and fired CIGS film were observed in an SEM. The wet bead milling was effective for the reduction and homogenization of the average grain size of CIGS powder. The CIGS grains in the film were well sintered and the size of CIGS grains was as large as about 2 μm. The CIGS solar cell showed an efficiency of 3.1%, with Voc of 0.279 V, Jsc of 28.8 mA/cm2 and FF of 0.386.

Type
Research Article
Copyright
Copyright © Materials Research Society 2009

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