Title :
Determining carrier multiplication efficiencies: Time-resolved terahertz spectroscopy on colloidal quantum dot solutions
Author :
Knight-Percival, Alexander S. ; Spencer, Billie F. ; Jamison, S.P. ; Flavell, Wendy R. ; Graham, Darren M.
Author_Institution :
Sch. of Phys. & Astron., Univ. of Manchester, Manchester, UK
Abstract :
Determination of carrier multiplication efficiencies in colloidal quantum dots may be performed using transient absorption or time-resolved terahertz spectroscopy. We aim to find whether terahertz techniques allow these values to be determined more reliably. Initial measurements on commercial dots demonstrate the viability of the technique.
Keywords :
II-VI semiconductors; cadmium compounds; colloidal crystals; semiconductor quantum dots; terahertz wave spectra; time resolved spectra; wide band gap semiconductors; zinc compounds; CdSe-ZnS; carrier multiplication efficiencies; colloidal quantum dot solutions; time-resolved terahertz spectroscopy; transient absorption; Absorption; Excitons; Laser beams; Laser excitation; Quantum dots; Semiconductor device measurement; Spectroscopy;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665868
