Time-resolved and Temperature-dependent Broadband Emission of Plasmon-coupled Quantum DotsShow full item record
Time-resolved and Temperature-dependent Broadband Emission of Plasmon-coupled Quantum Dots
Rice, Quinton; Raut, Sangram; Chib, Raul; Gryczynski, Zygmunt; Gryczynski, Ignacy; Wang, Andrew; Yu, William Y.; Tabibi, Bagher; Seo, Felix Jaetae
The broadband photoluminescence (PL) emissions from CdSe QDs and plasmon-coupled QDs were characterized with time-resolved and temperature-dependent spectroscopy for the application of solid-state white light. The origin of broad spectral emission includes the transitions from bandedge and surface-trapped states. The emission intensity enhancement of plasmon-coupled QDs with respect to that of bare QDs is attributable to the reduction of nonradiative decay and the local field enhancement with plasmon-exciton coupling through the Coulomb interaction. The temperature-dependent and time-resolved PL spectroscopy revealed the existence of selective contribution strength of both the local field enhancement and the reduction of nonradiative decay with plasmon-exciton coupling at different spectral regions.