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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Energy Materials 2017: Materials in Clean Power
Presentation Title Phase Relation Prediction for AgxCu1-xGayIn1-ySe2 PV Absorber Layers
Author(s) Zhi Li, Christopher P. Muzzillo, Shun-li Shang, Jianyun Shen, Po-Hsin Liao, Zi-kui Liu, Timothy J. Anderson
On-Site Speaker (Planned) Timothy J. Anderson
Abstract Scope The chalcopyrite alloy Cu(In,Ga)Se<SUB>2</SUB> (CIGS) has achieved tremendous success as an absorber for thin film PV devices. The absorber composition of the current champion cell, however, is not at the optimal bandgap energy. Alloying CIGS with Ag to form Ag<SUB>x</SUB>Cu<SUB>1-x</SUB>Ga<SUB>y</SUB>In<SUB>1-y</SUB>Se<SUB>2</SUB> (ACGIS) can not only increases the bandgap, but also promises to reduce the processing temperature, improves the crystalline quality, and provides more opportunities for liquid phase assisted growth to attain greater power conversion efficiency. Thus understanding the phase chemistry of the Ag-Cu-Ga-In-Se system is of interest to improve the absorber synthesis process. In this work, an assessment of the thermochemistry and phase equilibria of the Ag-Cu-Ga-In-Se system was performed based on available experimental data and predictions of temperature dependence of the Gibbs energies of formation for the intermetallic compounds. With the complete thermodynamic database, the implications for selenization of metal precursors are explored.
Proceedings Inclusion? Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)


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