Laser printing of photoluminescent porous silicon features

A system of laser image transfer for direct printing of photoluminescent porous silicon features is demonstrated. We found that the image resolution ;10 mm.is acceptable for opto-electronic displays and that the porous silicon PS. produced with laser illumination can emit a brightness up to 90 times higher than that of PS produced in the dark. Electrochemical measurements, optical microscopy, photoluminescence spectroscopy and Raman scattering analysis of laser-induced PS formation is discussed. q2000 Elsevier Science B.V. All rights reserved.