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PROBLEM TO BE SOLVED : To provide a skutterudite thermoelectric conversion semiconductor which has a good thermoelectric performance even in the case of not using a rare earth, Ba or the like which is questionable in terms of stable supply or oxidation resistance. SOLUTION : The above objective is achieved by a Si- and Te-doped skutterudite thermoelectric semiconductor having the following composition : CoSb3-x-ySixTey (where 0.003
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