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研究了纳米硅在3K-250K温度范围的光致发光谱的特性。观测到纳米硅的三个发光峰,其中心波长分别为470nm、479nm和487nm。随着温度的升高,470nm的发光峰呈现蓝移且强度明显增强,479nm的发光峰位不随温度的变化而变化,487nm的发光峰随温度的升高出现微小的红移。基于量子限制效应,提出综合发光模型解释实验结果。
The photoluminescence spectra of nanocrystalline silicon in the temperature range of 3K-250K were studied. The three luminescence peaks of nanosilica were observed with central wavelengths of 470 nm, 479 nm and 487 nm, respectively. With the increase of temperature, the luminescence peak at 470nm showed a blue shift and the intensity was significantly enhanced. The luminescence peak at 479nm did not change with temperature. The luminescence peak at 487nm showed slight redshift with the increase of temperature. Based on the quantum confinement effect, a comprehensive luminescence model is proposed to explain the experimental results.