Photoluminescence Excitation Spectroscopy and Light Emission Mechanism of Porous Silicon

【摘要】 <正> Much information concerning the light emission mechanism can be extracted fromthe investigation of photoluminescence(PL)and photoluminescence excitation (PLE)spectroscopy. There were many reports on the relation between the spectroscopicproperties of porous silicon and the sample preparation and post processingconditions. Several kinds of light emission models have been proposed based onthese experiments. Some articles reported the results of spectroscopic properties ofporous silicon in relation with different excitation conditions and suggested that a更多还原