The testing result of photoluminescence spectra at room temperature shows that all the samples have two emission bands, that is, UV emission band near the band-edge and visible emission band.
室温下样品光致发光光谱的测量结果表明：所有的样品均有两个发射带，即近带边紫外发射和可见发射带。
Furthermore, photoluminescence (PL) spectroscopic analysis shows a strong near band edge emission.
同时，光致发光(PL)光谱的分析显示出强的近带边发射峰。
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