Synthesis route and optical characterization of CdS:Mn/polyvinyl alcohol nanocomposite

• Published in: Semiconductor Physics Quantum Electronics & Optoelectronics
• Date: 2012
• Main Authors: Fediv, V.I., Rudko, G.Yu., Savchuk, A.I., Gule, E.G., Voloshchuk, A.G.
• Format: Article
• Language: English
• Published: Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України 2012
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/118288
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Synthesis route and optical characterization of CdS:Mn/polyvinyl alcohol nanocomposite / V.I. Fediv, G.Yu. Rudko, A.I. Savchuk, E.G. Gule, A.G. Voloshchuk // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2012. — Т. 15, № 2. — С. 117-123. — Бібліогр.: 29 назв. — англ.

CdS nanoparticles doped with Mn have been synthesized in aqueous solution
 by using polyvinyl alcohol (PVA) as a capping reagent. Influence of the polymer
 concentration on the size and concentration of the nanoparticles was studied using
 transmission electron microscopy and optical absorption. Incorporation of Mn²⁺ ions into
 CdS nanoparticles was confirmed by photoluminescence (PL) intensity increase and band
 shift with Mn concentration. The PL studies proved that localization of Mn ions (inside
 the nanoparticles or on the surface) depends on the sequence of synthesis steps. The
 bleaching of the low-energy PL band of the low-doped CdS:Mn nanoparticles by surface
 modification with a Cd(OH)₂ layer proves suppression of the emission related to surface
 states.