title: Photoluminescence spectra of CdSe/ZnS quantum dots in solution.
abstract: The spectral properties of CdSe/ZnS core-shell quantum dots (QDs) of 3 nm size have been studied under different organic solvents, concentrations and temperatures. Our results showed that the absorption spectra of CdSe/ZnS in benzene have two humps; one around 420 nm and another at 525 nm, with a steady increase in absorption along UV region, and the absorption spectral profile under a wide range of concentrations did not change. On the other hand, the photoluminescence (PL) spectra of CdSe/ZnS in benzene showed two bands one around 375 nm and the other around 550 nm. It could be seen that the band at 375 nm is due to the interaction between the shell (ZnS) with the solvent species in high excited state, and the band at 550 nm is due to core alone (CdSe).
authors.affiliation: Al Imam Mohammad Ibn Saud Islamic University (IMSIU), Physics Department, College of Science, P.O. Box 9095, Riyadh 11623, Saudi Arabia.
authors.forename: K H
authors.initials: KH
authors.lastname: Ibnaouf
authors.affiliation: Research Chair for Laser Diagnosis of Cancer, King Saud University, Saudi Arabia; Department of Physics & Astronomy, College of Science, King Saud University, Saudi Arabia.
authors.forename: Saradh
authors.initials: S
authors.lastname: Prasad
authors.affiliation: Research Chair for Laser Diagnosis of Cancer, King Saud University, Saudi Arabia; Department of Physics & Astronomy, College of Science, King Saud University, Saudi Arabia.
authors.forename: A
authors.initials: A
authors.lastname: Hamdan
authors.affiliation: Research Chair for Laser Diagnosis of Cancer, King Saud University, Saudi Arabia; Department of Physics & Astronomy, College of Science, King Saud University, Saudi Arabia. Electronic address: malsalhy@gmail.com.
authors.forename: M
authors.initials: M
authors.lastname: Alsalhi
authors.affiliation: Department of Physics & Astronomy, College of Science, King Saud University, Saudi Arabia.
authors.forename: A S
authors.initials: AS
authors.lastname: Aldwayyan
authors.affiliation: CEREM, College of Engineering - King Saud University, Saudi Arabia; Advanced Medical Research Institute of Canada, Sudbury, Canada.
authors.forename: M B
authors.initials: MB
authors.lastname: Zaman
authors.affiliation: Research Chair for Laser Diagnosis of Cancer, King Saud University, Saudi Arabia; Department of Physics & Astronomy, College of Science, King Saud University, Saudi Arabia.
authors.forename: V
authors.initials: V
authors.lastname: Masilamani
mesh_terms: D000042:Absorption; D001554:Benzene / Q000737:chemistry; D019187:Cadmium Compounds / Q000737:chemistry*; D049449:Luminescence; D045663:Quantum Dots / Q000737:chemistry*; D018036:Selenium Compounds / Q000737:chemistry*; D012996:Solutions; D012997:Solvents / Q000737:chemistry; D013057:Spectrum Analysis; D013440:Sulfides / Q000737:chemistry*; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D018036:Selenium Compounds; D012996:Solutions; D012997:Solvents; D013440:Sulfides; D017967:Zinc Compounds; C058667:cadmium selenide; D001554:Benzene; C031238:zinc sulfide
keywords: Photoluminescence spectra; Quantum dots; Solvent influence