Abstract
Kinetic stability of transparent p-type conducting oxide, SrCu2O2, has been evaluated by using X-ray diffraction measurement and thermogravimetry. It was revealed that SrCu2O2 decomposed to mixture of CuO and Sr14Cu24O41 in air at temperatures above 300°C. The decomposition reaction rate can be successfully explained by kinetic model assuming first-order chemical reaction. The rate constant can be suppressed with decreasing temperature and oxygen partial pressure. The activation energy for decomposition reaction of SrCu2O2 calculated from Arrhenius plot was 66kJ/mol, which was lower than those of other transparent p-type semiconductors such as CuAlO2 and CuGaO2. The low decomposition temperature and activation energy for decomposition indicate that chemical stability of SrCu2O2 is far lower than those of other p-type conducting oxides.
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