Abstract
In situ photoluminescence (PL) and transmission IR spectral measurements have been carried out for porous Si (PS) after exposure to thermoelectrons and subsequent exposure to D atoms or D2O. Upon exposure to thermoelectrons the PL band (765 nm) of the PS almost diminished accompanied by the intensity reduction of the IR bands due to Si-Hx (x= 1-3) species. A subsequent D atom exposure resulted in a recovery of the PL band with the formation of Si-Dx bonds. In contrast, D2O exposure gave rise to a new PL band at 650 nm in addition to a 745 nm band accompanied by the emergence of IR bands due to Si-OD and Si-D bonds: the integrated PL intensity after the D2O exposure is 1.2 times larger than the PL intensity of the as-anodized PS. These results suggest that the PL of the PS contains an important contribution from the surface Si-O bonds.
Original language | English |
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Pages (from-to) | 1851-1853 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 76 |
Issue number | 14 |
DOIs | |
Publication status | Published - 2000 Apr 3 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)