Formation of nanodots and enhancement of thermoelectric power induced by ion irradiation in PbTe:Ag composite thin films

Manju Bala; Ramcharan Meena; Srashti Gupta; Compesh Pannu; Tripurari S. Tripathi; Shikha Varma; Surya K. Tripathi; K. Asokan; Devesh K. Avasthi

doi:10.1016/j.nimb.2016.03.006

Formation of nanodots and enhancement of thermoelectric power induced by ion irradiation in PbTe:Ag composite thin films

Manju Bala^*, Ramcharan Meena, Srashti Gupta, Compesh Pannu, Tripurari S. Tripathi, Shikha Varma, Surya K. Tripathi, K. Asokan, Devesh K. Avasthi

^*Corresponding author for this work

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

6 Citations (Scopus)

Abstract

Present study demonstrates an enhancement in thermoelectric power of 10% Ag doped PbTe (PbTe:Ag) thin films when irradiated with 200. keV Ar ion. X-ray diffraction showed an increase in crystallinity for both PbTe and PbTe:10Ag nano-composite films after Ar ion irradiation due to annealing of defects in the grain boundaries. The preferential sputtering of Pb and Te ions in comparison to Ag ions resulted in the formation of nano-dots. This was further confirmed by X-ray photoelectron spectroscopy (XPS). Such an enhancement in thermoelectric power of irradiated PbTe:10Ag films in comparison to pristine PbTe:10Ag film is attributed to the decrease in charge carrier concentration that takes part in the transport process via restricting the tunneling of carriers through the wider potential barrier formed at the interface of nano-dots.

Original language	English
Pages (from-to)	36–41
Journal	NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH SECTION B: BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume	379
DOIs	https://doi.org/10.1016/j.nimb.2016.03.006
Publication status	Published - 2016
MoE publication type	A1 Journal article-refereed
Event	International Conference on Radiation Effects in Insulators - Jaipur, India Duration: 26 Oct 2015 → 31 Oct 2015 Conference number: 18

Keywords

Ion irradiation
Nanodots
Nanostructure
PbTe
Thermoelectric

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10.1016/j.nimb.2016.03.006

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Bala, M., Meena, R., Gupta, S., Pannu, C., Tripathi, T. S., Varma, S., Tripathi, S. K., Asokan, K., & Avasthi, D. K. (2016). Formation of nanodots and enhancement of thermoelectric power induced by ion irradiation in PbTe:Ag composite thin films. NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH SECTION B: BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 379, 36–41. https://doi.org/10.1016/j.nimb.2016.03.006

@article{15c91a747aa14c1d84722501518399fe,

title = "Formation of nanodots and enhancement of thermoelectric power induced by ion irradiation in PbTe:Ag composite thin films",

abstract = "Present study demonstrates an enhancement in thermoelectric power of 10% Ag doped PbTe (PbTe:Ag) thin films when irradiated with 200. keV Ar ion. X-ray diffraction showed an increase in crystallinity for both PbTe and PbTe:10Ag nano-composite films after Ar ion irradiation due to annealing of defects in the grain boundaries. The preferential sputtering of Pb and Te ions in comparison to Ag ions resulted in the formation of nano-dots. This was further confirmed by X-ray photoelectron spectroscopy (XPS). Such an enhancement in thermoelectric power of irradiated PbTe:10Ag films in comparison to pristine PbTe:10Ag film is attributed to the decrease in charge carrier concentration that takes part in the transport process via restricting the tunneling of carriers through the wider potential barrier formed at the interface of nano-dots.",

keywords = "Ion irradiation, Nanodots, Nanostructure, PbTe, Thermoelectric",

author = "Manju Bala and Ramcharan Meena and Srashti Gupta and Compesh Pannu and Tripathi, {Tripurari S.} and Shikha Varma and Tripathi, {Surya K.} and K. Asokan and Avasthi, {Devesh K.}",

year = "2016",

doi = "10.1016/j.nimb.2016.03.006",

language = "English",

volume = "379",

pages = "36–41",

journal = "NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH SECTION B: BEAM INTERACTIONS WITH MATERIALS AND ATOMS",

issn = "0168-583X",

publisher = "Elsevier",

note = "International Conference on Radiation Effects in Insulators, REI ; Conference date: 26-10-2015 Through 31-10-2015",

}

Bala, M, Meena, R, Gupta, S, Pannu, C, Tripathi, TS, Varma, S, Tripathi, SK, Asokan, K & Avasthi, DK 2016, 'Formation of nanodots and enhancement of thermoelectric power induced by ion irradiation in PbTe:Ag composite thin films', NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH SECTION B: BEAM INTERACTIONS WITH MATERIALS AND ATOMS, vol. 379, pp. 36–41. https://doi.org/10.1016/j.nimb.2016.03.006

Formation of nanodots and enhancement of thermoelectric power induced by ion irradiation in PbTe:Ag composite thin films. / Bala, Manju; Meena, Ramcharan; Gupta, Srashti et al.
In: NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH SECTION B: BEAM INTERACTIONS WITH MATERIALS AND ATOMS, Vol. 379, 2016, p. 36–41.

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

TY - JOUR

T1 - Formation of nanodots and enhancement of thermoelectric power induced by ion irradiation in PbTe:Ag composite thin films

AU - Bala, Manju

AU - Meena, Ramcharan

AU - Gupta, Srashti

AU - Pannu, Compesh

AU - Tripathi, Tripurari S.

AU - Varma, Shikha

AU - Tripathi, Surya K.

AU - Asokan, K.

AU - Avasthi, Devesh K.

N1 - Conference code: 18

PY - 2016

Y1 - 2016

N2 - Present study demonstrates an enhancement in thermoelectric power of 10% Ag doped PbTe (PbTe:Ag) thin films when irradiated with 200. keV Ar ion. X-ray diffraction showed an increase in crystallinity for both PbTe and PbTe:10Ag nano-composite films after Ar ion irradiation due to annealing of defects in the grain boundaries. The preferential sputtering of Pb and Te ions in comparison to Ag ions resulted in the formation of nano-dots. This was further confirmed by X-ray photoelectron spectroscopy (XPS). Such an enhancement in thermoelectric power of irradiated PbTe:10Ag films in comparison to pristine PbTe:10Ag film is attributed to the decrease in charge carrier concentration that takes part in the transport process via restricting the tunneling of carriers through the wider potential barrier formed at the interface of nano-dots.

AB - Present study demonstrates an enhancement in thermoelectric power of 10% Ag doped PbTe (PbTe:Ag) thin films when irradiated with 200. keV Ar ion. X-ray diffraction showed an increase in crystallinity for both PbTe and PbTe:10Ag nano-composite films after Ar ion irradiation due to annealing of defects in the grain boundaries. The preferential sputtering of Pb and Te ions in comparison to Ag ions resulted in the formation of nano-dots. This was further confirmed by X-ray photoelectron spectroscopy (XPS). Such an enhancement in thermoelectric power of irradiated PbTe:10Ag films in comparison to pristine PbTe:10Ag film is attributed to the decrease in charge carrier concentration that takes part in the transport process via restricting the tunneling of carriers through the wider potential barrier formed at the interface of nano-dots.

KW - Ion irradiation

KW - Nanodots

KW - Nanostructure

KW - PbTe

KW - Thermoelectric

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U2 - 10.1016/j.nimb.2016.03.006

DO - 10.1016/j.nimb.2016.03.006

M3 - Article

AN - SCOPUS:84977963082

SN - 0168-583X

VL - 379

SP - 36

EP - 41

JO - NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH SECTION B: BEAM INTERACTIONS WITH MATERIALS AND ATOMS

JF - NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH SECTION B: BEAM INTERACTIONS WITH MATERIALS AND ATOMS

T2 - International Conference on Radiation Effects in Insulators

Y2 - 26 October 2015 through 31 October 2015

ER -

Formation of nanodots and enhancement of thermoelectric power induced by ion irradiation in PbTe:Ag composite thin films

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Keywords

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