A
Arunasish Layek
Researcher at Indian Institute of Technology Bombay
Publications - 21
Citations - 607
Arunasish Layek is an academic researcher from Indian Institute of Technology Bombay. The author has contributed to research in topics: Photoluminescence & Nanocrystal. The author has an hindex of 12, co-authored 20 publications receiving 529 citations. Previous affiliations of Arunasish Layek include Katholieke Universiteit Leuven & University of Waterloo.
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Journal ArticleDOI
Ultranarrow and Widely Tunable Mn2+-Induced Photoluminescence from Single Mn-Doped Nanocrystals of ZnS-CdS Alloys
Abhijit Hazarika,Arunasish Layek,Suman De,Angshuman Nag,Saikat Debnath,Priya Mahadevan,Arindam Chowdhury,D. D. Sarma,D. D. Sarma,D. D. Sarma +9 more
TL;DR: It is shown that Mn PL emission can vary over a much wider range and exhibit widths substantially lower than reported so far, opening newer application possibilities and requiring a fundamental shift in the perception of the emission from Mn-doped semiconductor nanocrystals.
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Carrier recombination dynamics through defect states of ZnO nanocrystals: From nanoparticles to nanorods
TL;DR: In this article, the authors used time-resolved photoluminescence spectroscopy to probe carrier relaxation dynamics of defect emission from ZnO nanostructures of different size and shape.
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A Generalized Three-Stage Mechanism of ZnO Nanoparticle Formation in Homogeneous Liquid Medium
Arunasish Layek,Gargi Mishra,Archana Sharma,Marina Spasova,Subhabrata Dhar,Arindam Chowdhury,Rajdip Bandyopadhyaya +6 more
TL;DR: In this article, a priori time-scale calculation of the rate processes involving different elementary events, in conjunction with nanoparticle microscopy and spectroscopic data on particle diameter, has led to an underlying three-stage mechanism for nanoparticle formation.
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Two Distinct Origins of Highly Localized Luminescent Centers within InGaN/GaN Quantum-Well Light-Emitting Diodes
Suman De,Arunasish Layek,Archana Raja,Abdul Kadir,Mahesh Gokhale,Arnab Bhattacharya,Subhabrata Dhar,Arindam Chowdhury +7 more
TL;DR: In this paper, spectrally resolved photoluminescence (PL) microscopy has been performed on green-light-emitting In022Ga078N QW LEDs, by selectively generating carriers in the alloy layers, showing the presence of numerous inhomogeneously distributed low-band-gap traps with diverse radiative intensities.
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Synthesis of rare-earth doped ZnO nanorods and their defect–dopant correlated enhanced visible-orange luminescence
TL;DR: In this article, the authors reported the synthesis of size controlled ZnO and rare-earth doped ZnOs in the sub-10 nm diameter regime, where the preferential anisotropic growth of the nanostructures along the polar c-axis leads to the formation of wurtzite phase ZnNO nanorods.