title: Optical characteristics of CdSe quantum dots depending on growth conditions and surface passivation.
abstract: 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.
authors.affiliation: Department of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, Republic of Korea.
authors.forename: Soon Il
authors.initials: SI
authors.lastname: Jung
authors.forename: Hyun Young
authors.initials: HY
authors.lastname: Yeo
authors.forename: Ilgu
authors.initials: I
authors.lastname: Yun
authors.forename: Sung M
authors.initials: SM
authors.lastname: Cho
authors.forename: Il Ki
authors.initials: IK
authors.lastname: Han
authors.forename: Joo In
authors.initials: JI
authors.lastname: Lee
mesh_terms: 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
chemical_list: D019187:Cadmium Compounds; D008670:Metals; D018036:Selenium Compounds; C058667:cadmium selenide; D000432:Methanol