Title :
Aqueous synthesis and photoluminescence properties of CdSe/CdS core/shell quantum dots
Author :
An, Limin ; Yi, Jie ; Liu, Chunxia ; Wenyu An ; Qin, Zhiming
Author_Institution :
Center for Coll. Phys. Exp., Heilongjiang Univ., Harbin, China
Abstract :
Thiol-capped CdSe/CdS core/shell quantum dots which show high luminescence quantum yield are synthesized in aqueous solution with the application of ultrasonic irradiation. A combination of X-ray diffraction (XRD), UV-Vis absorption spectroscopy and photoluminescence spectroscopy are employed to analyze the QDs and determine their crystal structures and optical characters. Photostabilities of bare CdSe and CdSe/CdS core/shell QDs are compared under UV irradiation.
Keywords :
II-VI semiconductors; X-ray diffraction; cadmium compounds; crystal structure; photoluminescence; semiconductor growth; semiconductor quantum dots; ultrasonic effects; ultraviolet radiation effects; ultraviolet spectra; visible spectra; wide band gap semiconductors; CdSe-CdS; UV-visible absorption spectroscopy; X-ray diffraction; XRD; aqueous solution; core-shell quantum dots; crystal structure; high luminescence quantum yield; optical properties; photoluminescence properties; photostability; ultrasonic UV irradiation; Absorption; Indium phosphide; Instruments; Luminescence; Optical variables measurement; Soil measurements; Ultrasonic imaging; CdSe/CdS; Photoluminescence; Photostability; Quantum dots; core/shell;
Conference_Titel :
Electronics and Optoelectronics (ICEOE), 2011 International Conference on
Conference_Location :
Dalian, Liaoning
Print_ISBN :
978-1-61284-275-2
DOI :
10.1109/ICEOE.2011.6013213
