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New interpretation for visible photoluminescence in porous silicon

1993; Elsevier BV; Volume: 164-166; Linguagem: Inglês

10.1016/0022-3093(93)91152-s

1873-4812

Michio Kondo,

Nanowire Synthesis and Applications

Time-resolved (TR) photoluminescence (PL) measurements for porous silicon have been performed in the temperature region between 7 and 300 K. The PL decay consists of a subnanosecond component and a microsecond component at room temperature. The slower component is well described by a stretched exponential function, and the relaxation time shows the temperature dependence of exp(−A T−14), where A is a constant. Taking recent ESR results into account, we propose a new model for the visible PL from porous silicon.