S
Sreetama Dutta
Researcher at University of Calcutta
Publications - 14
Citations - 794
Sreetama Dutta is an academic researcher from University of Calcutta. The author has contributed to research in topics: Grain size & Irradiation. The author has an hindex of 10, co-authored 14 publications receiving 718 citations.
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Journal ArticleDOI
Role of defects in tailoring structural, electrical and optical properties of ZnO
Sreetama Dutta,S. Chattopadhyay,Anindya Sarkar,Mahuya Chakrabarti,Dirtha Sanyal,Debnarayan Jana +5 more
TL;DR: In this paper, a brief account of the evolution of defects due to controlled changes in polycrystalline zinc oxide has been presented and a coherent scenario in the light of previous works in this field has been discussed.
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Annealing effect on nano-ZnO powder studied from positron lifetime and optical absorption spectroscopy
Sreetama Dutta,S. Chattopadhyay,Debnarayan Jana,A. Banerjee,S.K Manik,Swapan Kumar Pradhan,Manas Sutradhar,Anindya Sarkar +7 more
TL;DR: In this article, different thermal stages of generation and recovery of cationic as well as anionic defects in granular ZnO are discussed in the light of XRD, PAL, and optical absorption studies.
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Defects and the optical absorption in nanocrystalline ZnO
Sreetama Dutta,S. Chattopadhyay,Manas Sutradhar,Anindya Sarkar,Mahuya Chakrabarti,Dirtha Sanyal,Debnarayan Jana +6 more
TL;DR: In this paper, the structural and optical properties of mechanically milled high purity ZnO powder are investigated and a correlation between the structural properties of the powder and its optical properties is reported.
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Defect dynamics in annealed ZnO by positron annihilation spectroscopy
Sreetama Dutta,Mahuya Chakrabarti,S. Chattopadhyay,Debnarayan Jana,Dirtha Sanyal,Anindya Sarkar +5 more
TL;DR: In this paper, annealing up to 300°C, an increase of defect lifetime (τ2) as well as shape parameter (S parameter) has been observed, which is possibly due to oxygen evaporation from the sample.
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Synthesis and characterization of single-phase Mn-doped ZnO
S. Chattopadhyay,Sreetama Dutta,Aritra Banerjee,Debnarayan Jana,Sudipta Bandyopadhyay,Anindya Sarkar +5 more
TL;DR: In this paper, the authors identified up to what extent doping will enable synthesizing single-phase polycrystalline Mn-doped ZnO sample, which is one of the prerequisites for dilute magnetic semiconductor, and analyzed its some other physical aspects.