Swift heavy ion beam irradiation induced modifications in structural, morphological and optical properties of CdS thin films

S. Chandramohan; R. Sathyamoorthy; P. Sudhagar; D. Kanjilal; D. Kabiraj; K. Asokan

doi:10.1016/j.nimb.2006.11.041

Swift heavy ion beam irradiation induced modifications in structural, morphological and optical properties of CdS thin films

S. Chandramohan, R. Sathyamoorthy^*, P. Sudhagar, D. Kanjilal, D. Kabiraj, K. Asokan

^*Corresponding author for this work

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

64 Citations (Scopus)

Abstract

The effect of 100 MeV Ag⁺⁷ ion irradiation on the properties of thermally evaporated CdS thin films has been investigated. The structure of the films studied is polycrystalline with a mixture of dominant hexagonal and few traces of cubic phases. A shift in the peak position due to irradiation was observed and is discussed on the basis of change in the residual stress. Annihilation of microcracks due to irradiation induced grain growth has been observed from the SEM micrographs at lower ion fluences. The optical transmittance and absorption spectra revealed a shift in the fundamental absorption edge and hence variations in the optical band gap. The band gap energy has been estimated for as-deposited and irradiated films and is found to decreases upon irradiation. A significant increase of refractive index has been observed after irradiation.

Original language	English
Pages (from-to)	236-242
Number of pages	7
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	254
Issue number	2
DOIs	https://doi.org/10.1016/j.nimb.2006.11.041
Publication status	Published - Jan 2007

Keywords

CdS thin films
MeV ion irradiation
Optical band gap
Structure
Surface morphology

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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10.1016/j.nimb.2006.11.041

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Chandramohan, S., Sathyamoorthy, R., Sudhagar, P., Kanjilal, D., Kabiraj, D., & Asokan, K. (2007). Swift heavy ion beam irradiation induced modifications in structural, morphological and optical properties of CdS thin films. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 254(2), 236-242. https://doi.org/10.1016/j.nimb.2006.11.041

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title = "Swift heavy ion beam irradiation induced modifications in structural, morphological and optical properties of CdS thin films",

abstract = "The effect of 100 MeV Ag+7 ion irradiation on the properties of thermally evaporated CdS thin films has been investigated. The structure of the films studied is polycrystalline with a mixture of dominant hexagonal and few traces of cubic phases. A shift in the peak position due to irradiation was observed and is discussed on the basis of change in the residual stress. Annihilation of microcracks due to irradiation induced grain growth has been observed from the SEM micrographs at lower ion fluences. The optical transmittance and absorption spectra revealed a shift in the fundamental absorption edge and hence variations in the optical band gap. The band gap energy has been estimated for as-deposited and irradiated films and is found to decreases upon irradiation. A significant increase of refractive index has been observed after irradiation.",

keywords = "CdS thin films, MeV ion irradiation, Optical band gap, Structure, Surface morphology",

author = "S. Chandramohan and R. Sathyamoorthy and P. Sudhagar and D. Kanjilal and D. Kabiraj and K. Asokan",

note = "Funding Information: This work was supported by the Inter-University Accelerator Centre (IUAC), New Delhi, India through the Project UFUP 34319. The authors cordially acknowledge the help extended by technical staff of Pelletron group during the irradiation experiment. One of the authors (R.S.) gratefully acknowledges University Grants Commission (UGC), New Delhi for awarding UGC-Research Award – Project No. F-30-1/2004 (SA-II).",

year = "2007",

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doi = "10.1016/j.nimb.2006.11.041",

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Chandramohan, S, Sathyamoorthy, R, Sudhagar, P, Kanjilal, D, Kabiraj, D & Asokan, K 2007, 'Swift heavy ion beam irradiation induced modifications in structural, morphological and optical properties of CdS thin films', Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 254, no. 2, pp. 236-242. https://doi.org/10.1016/j.nimb.2006.11.041

Swift heavy ion beam irradiation induced modifications in structural, morphological and optical properties of CdS thin films. / Chandramohan, S.; Sathyamoorthy, R.; Sudhagar, P. et al.
In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 254, No. 2, 01.2007, p. 236-242.

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

TY - JOUR

T1 - Swift heavy ion beam irradiation induced modifications in structural, morphological and optical properties of CdS thin films

AU - Chandramohan, S.

AU - Sathyamoorthy, R.

AU - Sudhagar, P.

AU - Kanjilal, D.

AU - Kabiraj, D.

AU - Asokan, K.

N1 - Funding Information: This work was supported by the Inter-University Accelerator Centre (IUAC), New Delhi, India through the Project UFUP 34319. The authors cordially acknowledge the help extended by technical staff of Pelletron group during the irradiation experiment. One of the authors (R.S.) gratefully acknowledges University Grants Commission (UGC), New Delhi for awarding UGC-Research Award – Project No. F-30-1/2004 (SA-II).

PY - 2007/1

Y1 - 2007/1

N2 - The effect of 100 MeV Ag+7 ion irradiation on the properties of thermally evaporated CdS thin films has been investigated. The structure of the films studied is polycrystalline with a mixture of dominant hexagonal and few traces of cubic phases. A shift in the peak position due to irradiation was observed and is discussed on the basis of change in the residual stress. Annihilation of microcracks due to irradiation induced grain growth has been observed from the SEM micrographs at lower ion fluences. The optical transmittance and absorption spectra revealed a shift in the fundamental absorption edge and hence variations in the optical band gap. The band gap energy has been estimated for as-deposited and irradiated films and is found to decreases upon irradiation. A significant increase of refractive index has been observed after irradiation.

AB - The effect of 100 MeV Ag+7 ion irradiation on the properties of thermally evaporated CdS thin films has been investigated. The structure of the films studied is polycrystalline with a mixture of dominant hexagonal and few traces of cubic phases. A shift in the peak position due to irradiation was observed and is discussed on the basis of change in the residual stress. Annihilation of microcracks due to irradiation induced grain growth has been observed from the SEM micrographs at lower ion fluences. The optical transmittance and absorption spectra revealed a shift in the fundamental absorption edge and hence variations in the optical band gap. The band gap energy has been estimated for as-deposited and irradiated films and is found to decreases upon irradiation. A significant increase of refractive index has been observed after irradiation.

KW - CdS thin films

KW - MeV ion irradiation

KW - Optical band gap

KW - Structure

KW - Surface morphology

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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

IS - 2

ER -

Swift heavy ion beam irradiation induced modifications in structural, morphological and optical properties of CdS thin films

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