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it should be noticed that the negatively charged oxygen species from the grain boundaries can act as trapping sites and form potential barriers or depletion regions to decrease carrier concentration and mobility. Ϊʲô¸º¼ÛµÄÑõÄܹ»×÷Ϊ²¶»ñ룬²»Àí½â£¬Ï£Íû¸ßÊÖÖ¸½Ì£¬Íò·Ö¸Ðл |
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