Chemical stability of CuInS{sub 2} in oxygen at 298 K

Journal Article · Sat Feb 01 04:00:00 EST 1997 · Journal of Materials Research

DOI:https://doi.org/10.1557/JMR.1997.0051· OSTI ID:467269

Grzanna, J; Migge, H ^[1]

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1. Hahn-Meitner-Institut Berlin GmbH, Glienicker Strae 100, D-14109 Berlin (Germany)

A thermochemical analysis is performed in the quaternary system Cu{endash}In{endash}S{endash}O at 298 K including the respective four ternaries. The Cu{endash}In phase diagram is updated with respect to the new experimental as well as to the new thermochemical results in the literature. Free energies of In{sub 6}S{sub 7}, In{sub 2.8}S{sub 4}, CuIn{sub 2}, and Cu{sub 2}In{sub 2}O{sub 5} have been estimated. Consistent sets of data are used for the calculations of the ternary systems with the program THERMO, and the results are used to calculate the quaternary tetrahedron Cu{endash}In{endash}S{endash}O with the program THERMOQ; the algorithm is given. Twelve quaternary two-phase equilibria have been found. They are used to calculate predominance area diagrams of the quaternary system with the program STADIAQ for different oxygen partial pressures. The algorithm of this program is given. From these diagrams it becomes obvious that CuInS{sub 2} is unstable in air and even in UHV systems and should react to form In{sub 2}(SO{sub 4}){sub 3} and Cu{sub 2}S at oxygen pressures larger than logp(pascal)={minus}51.5. The results are useful for research in fields such as oxidation and crystal growth of CuInS{sub 2} and for development of processes for producing this compound. {copyright} {ital 1997 Materials Research Society.}

• OSTI ID: 467269
• Journal Information: Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 2 Vol. 12; ISSN JMREEE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALGORITHMS
AMBIENT TEMPERATURE
COPPER SULFIDE SOLAR CELLS
COPPER SULFIDES
FREE ENERGY
INDIUM SULFIDES
OXIDATION
PHASE DIAGRAMS
PHOTOVOLTAIC CELLS
REACTIVITY
SIMULATION
STABILITY