Correlated quartic variation of band gap and NBE energy in sol-gel derived Zn                         1−x                         Co                         x                         O nanoparticles

Saikat Chattopadhyay; Kamakhya Prakash Misra; Arunava Agarwala; Ashok Rao; P. D. Babu

doi:10.1016/j.matchemphys.2019.02.003

Correlated quartic variation of band gap and NBE energy in sol-gel derived Zn _1−x Co _x O nanoparticles

Saikat Chattopadhyay
, Kamakhya Prakash Misra^*
, Arunava Agarwala
, Ashok Rao
, P. D. Babu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

Zn _1−x Co _x O (x = 0.0, 0.01, 0.03, 0.05, 0.07) nanoparticles were synthesized via sol-gel method. For structural parameters like lattice constants, bond length and particle size, XRD patterns have been analyzed. The particle sizes lie between 15.75 and 35.31 nm. The Williamson-Hall analysis has been performed for strain calculation. The UV–Visible spectra show high transparency in visible range with a dip in near UV region. The band gap calculation has been done using Tauc's plot method. The band gap values show a quartic variation with x. PL emission spectra exhibit NBE emission that too undergoes quartic variation with x. The correlation between both the quartic variations has been analyzed and it has been established that the B-M effect and sp-d exchange interaction both play their role alternately. M-H curves of the Co doped nanoparticles show room temperature ferromagnetism whereas the undoped one have the diamagnetic character. The electrical resistivity has been found to be high; in the range of 4.81 × 10 ⁴ to 7.26 × 10 ⁴ Ω-m. A increasing trend in resistivity is noticed with increasing the Co concentration in ZnO matrix.

Original language	English
Pages (from-to)	236-241
Number of pages	6
Journal	Materials Chemistry and Physics
Volume	227
DOIs	https://doi.org/10.1016/j.matchemphys.2019.02.003
Publication status	Published - 01-04-2019

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics

Access to Document

10.1016/j.matchemphys.2019.02.003

Cite this

Chattopadhyay, S., Misra, K. P., Agarwala, A., Rao, A., & Babu, P. D. (2019). Correlated quartic variation of band gap and NBE energy in sol-gel derived Zn _1−x Co _x O nanoparticles. Materials Chemistry and Physics, 227, 236-241. https://doi.org/10.1016/j.matchemphys.2019.02.003

@article{3615cf97ec6a4284971a2a7704ebc26c,

title = "Correlated quartic variation of band gap and NBE energy in sol-gel derived Zn 1−x Co x O nanoparticles",

abstract = " Zn 1−x Co x O (x = 0.0, 0.01, 0.03, 0.05, 0.07) nanoparticles were synthesized via sol-gel method. For structural parameters like lattice constants, bond length and particle size, XRD patterns have been analyzed. The particle sizes lie between 15.75 and 35.31 nm. The Williamson-Hall analysis has been performed for strain calculation. The UV–Visible spectra show high transparency in visible range with a dip in near UV region. The band gap calculation has been done using Tauc's plot method. The band gap values show a quartic variation with x. PL emission spectra exhibit NBE emission that too undergoes quartic variation with x. The correlation between both the quartic variations has been analyzed and it has been established that the B-M effect and sp-d exchange interaction both play their role alternately. M-H curves of the Co doped nanoparticles show room temperature ferromagnetism whereas the undoped one have the diamagnetic character. The electrical resistivity has been found to be high; in the range of 4.81 × 10 4 to 7.26 × 10 4 Ω-m. A increasing trend in resistivity is noticed with increasing the Co concentration in ZnO matrix. ",

author = "Saikat Chattopadhyay and Misra, \{Kamakhya Prakash\} and Arunava Agarwala and Ashok Rao and Babu, \{P. D.\}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

month = apr,

day = "1",

doi = "10.1016/j.matchemphys.2019.02.003",

language = "English",

volume = "227",

pages = "236--241",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

publisher = "Elsevier B.V.",

}

Chattopadhyay, S, Misra, KP, Agarwala, A, Rao, A & Babu, PD 2019, 'Correlated quartic variation of band gap and NBE energy in sol-gel derived Zn _1−x Co _x O nanoparticles', Materials Chemistry and Physics, vol. 227, pp. 236-241. https://doi.org/10.1016/j.matchemphys.2019.02.003

Correlated quartic variation of band gap and NBE energy in sol-gel derived Zn _1−x Co _x O nanoparticles. / Chattopadhyay, Saikat; Misra, Kamakhya Prakash; Agarwala, Arunava et al.
In: Materials Chemistry and Physics, Vol. 227, 01.04.2019, p. 236-241.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Correlated quartic variation of band gap and NBE energy in sol-gel derived Zn 1−x Co x O nanoparticles

AU - Chattopadhyay, Saikat

AU - Misra, Kamakhya Prakash

AU - Agarwala, Arunava

AU - Rao, Ashok

AU - Babu, P. D.

PY - 2019/4/1

Y1 - 2019/4/1

N2 - Zn 1−x Co x O (x = 0.0, 0.01, 0.03, 0.05, 0.07) nanoparticles were synthesized via sol-gel method. For structural parameters like lattice constants, bond length and particle size, XRD patterns have been analyzed. The particle sizes lie between 15.75 and 35.31 nm. The Williamson-Hall analysis has been performed for strain calculation. The UV–Visible spectra show high transparency in visible range with a dip in near UV region. The band gap calculation has been done using Tauc's plot method. The band gap values show a quartic variation with x. PL emission spectra exhibit NBE emission that too undergoes quartic variation with x. The correlation between both the quartic variations has been analyzed and it has been established that the B-M effect and sp-d exchange interaction both play their role alternately. M-H curves of the Co doped nanoparticles show room temperature ferromagnetism whereas the undoped one have the diamagnetic character. The electrical resistivity has been found to be high; in the range of 4.81 × 10 4 to 7.26 × 10 4 Ω-m. A increasing trend in resistivity is noticed with increasing the Co concentration in ZnO matrix.

AB - Zn 1−x Co x O (x = 0.0, 0.01, 0.03, 0.05, 0.07) nanoparticles were synthesized via sol-gel method. For structural parameters like lattice constants, bond length and particle size, XRD patterns have been analyzed. The particle sizes lie between 15.75 and 35.31 nm. The Williamson-Hall analysis has been performed for strain calculation. The UV–Visible spectra show high transparency in visible range with a dip in near UV region. The band gap calculation has been done using Tauc's plot method. The band gap values show a quartic variation with x. PL emission spectra exhibit NBE emission that too undergoes quartic variation with x. The correlation between both the quartic variations has been analyzed and it has been established that the B-M effect and sp-d exchange interaction both play their role alternately. M-H curves of the Co doped nanoparticles show room temperature ferromagnetism whereas the undoped one have the diamagnetic character. The electrical resistivity has been found to be high; in the range of 4.81 × 10 4 to 7.26 × 10 4 Ω-m. A increasing trend in resistivity is noticed with increasing the Co concentration in ZnO matrix.

UR - https://www.scopus.com/pages/publications/85061302684

UR - https://www.scopus.com/pages/publications/85061302684#tab=citedBy

U2 - 10.1016/j.matchemphys.2019.02.003

DO - 10.1016/j.matchemphys.2019.02.003

M3 - Article

AN - SCOPUS:85061302684

SN - 0254-0584

VL - 227

SP - 236

EP - 241

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

ER -

Correlated quartic variation of band gap and NBE energy in sol-gel derived Zn _1−x Co _x O nanoparticles

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this