Kenyon, AJ; Wojdak, M; Ahmad, I; Loh, WH; Oton, CJ; (2008) Generalized rate-equation analysis of excitation exchange between silicon nanoclusters and erbium ions. Physical Review B , 77 (3) , Article 035318. 10.1103/PhysRevB.77.035318.

Preview

PDF 148157_PRB%2077-035318%202008.pdf Available under License : See the attached licence file. Download (454kB)

Abstract

We discuss the use of rate equations to analyze the sensitization of erbium luminescence by silicon nanoclusters. In applying the general form of second-order coupled rate-equations to the Si nanocluster-erbium system, we find that the photoluminescence dynamics cannot be described using a simple rate equation model. Both rise and fall times exhibit a stretched exponential behavior, which we propose arises from a combination of a strongly distance-dependent nanocluster-erbium interaction, along with the finite size distribution and indirect band gap of the silicon nanoclusters. Furthermore, the low fraction of erbium ions that can be excited nonresonantly is a result of the small number of ions coupled to nanoclusters.

Download activity - last month

Export as JSONXMLCSV

Download activity - last 12 months

Export as JSONCSVXML

Downloads by country - last 12 months

Export as XMLCSVJSON

Archive Staff Only

View Item