Title :
Photoluminescence up-conversion involving surface states in colloidal CdTe quantum dots
Author :
Xiaoyong Wang ; Jiayu Zhang ; Min Xiao
Author_Institution :
Dept. of Phys., Arkansas Univ., Fayetteville, AR, USA
Abstract :
Efficient photoluminescence up-conversion was observed in colloidal CdTe quantum dots with an energy gain of /spl sim/360 meV. We attribute this up-converted signal to the recombination of carriers from conduction band and hole surface states, respectively.
Keywords :
II-VI semiconductors; cadmium; electron-hole recombination; photoluminescence; semiconductor quantum dots; surface states; time resolved spectra; CdTe; carrier recombination; colloidal quantum dots; conduction band; hole surface states; photoluminescence up-conversion; surface states; Charge carrier processes; Energy states; Laser excitation; Optical sensors; Photoluminescence; Photonic band gap; Quantum dots; Radiative recombination; Spectroscopy; US Department of Transportation;
Conference_Titel :
Quantum Electronics and Laser Science, 2003. QELS. Postconference Digest
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-749-0
DOI :
10.1109/QELS.2003.238521
