1. The band edge excitonic transitions were measured by the reflectivity and photoluminescence measurements.
   利用反射及光激萤光量测能隙边缘的激子跃迁。The band edge excitonic transitions were measured by the reflectivity and photoluminescence measurements.
   利用反射及光激萤光量测能隙边缘的激子跃迁。

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