Influence of precursor ratio and dopant concentration on the structure and optical properties of Cu-doped ZnCdSe-alloyed quantum dots

Abstract

<p>Tunable copper doped Zn_1−xCd_xS alloy quantum dots (QDs) were successfully synthesized by the wet chemical method.</p>

Effect of dopant concentration and the role of ZnS shell on optical properties of Sm3+doped CdS quantum dots

“…A broad hump observed in the range of 550 nm–800 nm is assigned to the recombination via surface localized states. 49 The luminescent spectra of lanthanide-doped semiconductor QDs are caused by the radiative transition from intra-4f electrons of triply ionized lanthanides. Therefore, they are promising materials for light emitters.…”

Phonon Characterization, Structural and Optical Properties of Type-II CdSe/CdTe core/shell and Type-II/type-I CdSe/CdTe/ZnS core/shell/shell Quantum Dots

“…The diffraction peaks show broadening phenomena because of the QDs' small sizes. According to Scherrer's formula, crystallite size D = Kλ/(Bcosθ) [16], where K is the Scherrer constant, λ is the wavelength (1.5406 A˚ for Cu-Kα radiation), B is the FWHM of the XRD peaks, and θ is the peak position. From the line width analysis of the (111) reflection peak using the Scherrer equation, the average diameter of CdSe QDs is estimated about 5.4 nm, which is in agreement with the result has obtained from the equation of Yu.…”

Hydrothermal synthesis of water-soluble Mn- and Cu-doped CdSe quantum dots with multi-shell structures and their photoluminescence properties

“…1–5 Furthermore, new optical and magnetic properties can be imparted to QDs by doping with transition metal ions. 6–9 Therefore, transition metal-doped quantum dots (doped QDs) have attracted attention in various fields, such as highly efficient photoluminescent materials, 6,7,10–15 wavelength conversion materials, 16–21 and spin-photonics. 22–28 Focusing on the optical properties of doped QDs, their photoluminescence (PL) properties can be controlled by doping with Mn or Cu ions.…”