Influence of Mn doping on the microstructure and optical properties of CdS

Structural, optical and magnetic studies on non-aqueous synthesized CdS:Mn nanomaterials

“…The average particles size inferred from the TEM micrographs is 19 nm and it is same for all the samples (undoped and doped). No alteration in the size and shape is observed due to the incorporation of dopant but it causes the agglomeration of the particles and is found to increase with respect to dopant concentration, these results satisfactorily agree with Wang et al [31]. The agglomeration of the particles is caused by the following factors namely; reaction rate, impurities, pH, charges of the particles and solubility product constants.…”

Structural, optical and photoconductivity characteristics of manganese doped cadmium sulfide nanoparticles synthesized by co-precipitation method

“…The reduced PL intensity of green emission indicates transfer of energy from excited carriers trapped at the surface to Mn 2+ ions. The orange emission ∼575 nm is due to 4 T 1 → 6 A 1 transition of Mn 2+ [15,20,[50][51][52][53][54]. Maximum orange emission intensity is found for 1 mol% Mn concentration.…”

“…However, Mn-doped CdS NPs exhibit two major emission peaks, a broad emission peak centered around at ∼526 nm (∼2.35 eV) and one emission peak at ∼575 nm (∼2.15 eV). The green emission at ∼526 nm is due to radiative recombination of electrons and holes via the surface/defect states present in the NPs [50,51]. The reduced PL intensity of green emission indicates transfer of energy from excited carriers trapped at the surface to Mn 2+ ions.…”

Properties of CdS films doped with magnesium and fluorine

“…The electrons, transfer to the surface states non-radiatively after excitation extending into the band gap region. 22 The PL peak at 572 nm corresponds to radiative recombination involving shallow levels in the band gap due to native impurities. The green peak observed at 536 nm may be related to sulphur interstitial acceptors (I s − ) compensated by a close ionised donor centre.…”