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G. MURALI1, D. AMARANATHA REDDY1, B. POORNAPRAKASH1, R. P. VIJAYALAKSHMI1,* , N. MADHUSUDHANA RAO2
ZnS nanocrystals (NCs) (~2.66 nm) capped with 2-mercaptoethonal were synthesized from Na2S and Zinc acetate using a chemical co-precipitation method. Structural, morphological and optical properties of ZnS NCs annealed in air at temperatures up to 600 0C are presented. High temperature wurtzite phase of ZnS appeared at 400 0C and annealing up to 600 0C results in change of compound from ZnS to ZnO. Agglomeration of particles increased with increasing annealing temperature was observed from scanning electron microscopy (SEM) images. Decreasing of band gap with increasing annealing temperature was observed from diffuse reflectance studies (DRS) studies. Temperature dependent quenching and raising behavior of photoluminescence (PL) emissions accompanied by a red shift of PL peak from violet region to green region was observed..
Nanocrystals, ZnS, Annealing, Redshift.
G. MURALI, D. AMARANATHA REDDY, B. POORNAPRAKASH, R. P. VIJAYALAKSHMI, N. MADHUSUDHANA RAO, Effect of annealing on structural and optical properties of ZnS nanocrystals, Optoelectronics and Advanced Materials - Rapid Communications, 5, 9, September 2011, pp.928-931 (2011).
Submitted at: Sept. 18, 2011
Accepted at: Sept. 15, 2011
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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