Optical characteristics of CdSe quantum dots depending on growth conditions and surface passivation.
We investigated the effects of different growth conditions and surface passivation on the growth of CdSe quantum dots (QDs). The synthesis of CdSe QDs by pyrolysis of organometallic reagents was performed by using the hot-matrix method. In order to modify the size and quality of CdSe QDs, we controlled the growth temperature from 250 degrees C to 350 degrees C and the relative amount of trioctylphosphin (as the ligand of the Cd and Se precursors) to be injected into the coordinating solvent trioctylphosphineoxide. Moreover, an effective surface passivation of mono-disperse CdSe QDs was achieved by overcoating them with a larger band gap material, such as ZnS.
Jung
Soon Il
SI
Department of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, Republic of Korea.
Yeo
Hyun Young
HY
Yun
Ilgu
I
Cho
Sung M
SM
Han
Il Ki
IK
Lee
Joo In
JI
D000042:Absorption; D019187:Cadmium Compounds; D003460:Crystallization; D008027:Light; D053768:Metal Nanoparticles / Q000737:chemistry; D008670:Metals / Q000737:chemistry; D000432:Methanol / Q000737:chemistry; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology / Q000379:methods*; D055095:Optics and Photonics; D045663:Quantum Dots; D018036:Selenium Compounds; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013499:Surface Properties; D013696:Temperature
D019187:Cadmium Compounds; D008670:Metals; D018036:Selenium Compounds; C058667:cadmium selenide; D000432:Methanol