Anomalous photoluminescence enhancement due to hot electron transfer in core–shell Au–CdS nanocrystals

摘要: Abstract At room temperature, an enhanced photoluminescence (PL) intensity of core–shell Au–CdS nanocrystals (NCs) with respect to that CdS NCs is observed; weakly affected at low temperature. PL as a function temperature depicts three different regions in and NCs; the difference nature curves implicates hot electron transfer from Au CdS. Even though, Fermi level lower energy than conduction NCs, plasmon induced charge overcomes potential barrier enhances band edge emission Moreover, splits narrow sharp distinct features free exciton bound levels along first second order phonon replica. In case remains unaffected, while replica are perturbed; measured values lines fit well empirical Varshni equation revealing intrinsic The present work demonstrates decay by generating semiconductor; concept great for harvesting.