Kb. Sundaram et al., PHOTOLUMINESCENCE STUDIES OF THERMAL IMPURITY DIFFUSED POROUS SILICONLAYERS, Journal of materials science. Materials in electronics, 8(3), 1997, pp. 163-169
Porous silicon layers were formed on diffused layers. Both boron and p
hosphorus impurities were thermally diffused using solid sources in n-
Si, p-Si, n-epi/Si and p-epi/Si substrates of various resistivities. P
orous silicon on these layers was formed by electrochemical and chemic
al etching under various etching conditions. Strong visible luminescen
ce was observed from these porous silicon structures. Infrared absorpt
ion studies indicated that surface molecule identities are immaterial
to the enhancement or degradation of photoluminescence.