We prepared luminescent silicon by incorporating H2O2 in the anodizing process. Under UV excitation, our samples appear reddish, orangish, yellowish to greenish as the electrolyte-air interface at the meniscus is approached. Under high current anodization, the emission becomes broad but unstable. The time characteristics of all the emission regions are in the range of 1-10 μs. The results are consistent with a significant reduction of crystallite sizes, and may be explained via novel Si - Si dimer surface states that are induced by quantum confinement.
ASJC Scopus subject areas
- Physics and Astronomy(all)