Room temperature synthesis of Mn2+ doped ZnS d-dots and observation of tunable dual emission: Effects of doping concentration, temperature, and ultraviolet light illumination


Autoria(s): Kole, AK; Tiwary, CS; Kumbhakar, P
Data(s)

2013

Resumo

Mn2+ doped (0-50.0 molar %) ZnS d-dots have been synthesized in water medium by using an environment friendly low cost chemical technique. Tunable dual emission in UV and yellow-orange regions is achieved by tailoring the Mn2+ doping concentration in the host ZnS nanocrystal. The optimum doping concentration for achieving efficient photoluminescence (PL) emission is determined to be similar to 1.10 (at. %) corresponding to 40.0 (molar %) of Mn2+ doping concentration used during synthesis. The mechanism of charge transfer from the host to the dopant leading to the intensity modulated tunable (594-610 nm) yellow-orange PL emission is straightforwardly understood as no capping agent is used. The temperature dependent PL emission measurements are carried out, viz., in 1.10 at. % Mn2+ doped sample and the experimental results are explained by using a theoretical PL emission model. It is found that the ratio of non-radiative to radiative recombination rates is temperature dependent and this phenomenon has not been reported, so far, in Mn2+ doped ZnS system. The colour tuning of the emitted light from the samples are evident from the calculated chromaticity coordinates. UV light irradiation for 150 min in 40.0 (molar %) Mn2+ doped sample shows an enhancement of 33% in PL emission intensity. (C) 2013 American Institute of Physics. http://dx.doi.org/10.1063/1.4795779]

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/46431/1/jl_app_phy_113_11_114308_2013.pdf

Kole, AK and Tiwary, CS and Kumbhakar, P (2013) Room temperature synthesis of Mn2+ doped ZnS d-dots and observation of tunable dual emission: Effects of doping concentration, temperature, and ultraviolet light illumination. In: JOURNAL OF APPLIED PHYSICS, 113 (11).

Publicador

AMER INST PHYSICS

Relação

http://dx.doi.org/10.1063/1.4795779

http://eprints.iisc.ernet.in/46431/

Palavras-Chave #Materials Engineering (formerly Metallurgy)
Tipo

Journal Article

PeerReviewed