Charge injection and trapping in silicon nanocrystals

Charge injection and trapping in TiO2 nanoparticles decorated silicon nanowires arrays

Light trapping and guidance in plasmonic nanocrystals.

We illustrate the possibility of light trapping and funneling in periodic arrays of metallic nanoparticles. A controllable minimum in the transmission spectra of such constructs arises from a collective plasmon resonance phenomenon, where an incident plane wave sharply localizes in the vertical direction, remaining delocalized in the direction parallel to the crystal plane. Using hybrid arrays ...

Silicon Nanocrystals

Silicon has many advantages over other semiconductor materials: low cost, nontoxicity, practically unlimited availability, and decades of experience in purification, growth and device fabrication. It is used for almost all modern electronic devices. However, the indirect energy gap in bulk crystalline Si makes it unable to emit light efficiently and thus unsuitable for optoelectronic applicatio...

Electronic transport in silicon nanocrystals and nanochains

0167-9317/$ see front matter 2009 Elsevier B.V. A doi:10.1016/j.mee.2009.03.123 q This paper was presented in MNE 2008 c www.mne-conf.org. * Corresponding author. Address: Department of E neering, Imperial College London, South Kensington C Tel.: +44 207 5946232. E-mail address: [email protected] (Z.A.K. D 1 JSPS Fellow. Si nanocrystals and nanochains, prepared by material synthesis, pro...

Charge transfer state emission dynamics in blue-emitting functionalized silicon nanocrystals.

We explore the dynamics of blue emission from dodecylamine and ammonia functionalized silicon nanocrystals (Si NCs) with average diameters of ∼3 and ∼6 nm using time-resolved photoluminescence (TRPL) spectroscopy. The Si NCs exhibit nanosecond PL decay dynamics that is independent of NC size and uniform across the emission spectrum. The TRPL measurements reveal complete quenching of core state ...