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Title: Effect of 100 MeV Ni<sup>8+</sup> ion irradiation on nanocrystalline PbS
Authors: Choudhury, N
Singh, F
Sarma, B K
Keywords: Swift heavy ions
X-ray diffraction
Issue Date: May-2012
Publisher: NISCAIR-CSIR, India
Abstract: Nanocrystalline PbS prepared onto glass substrates by chemical bath deposition technique are irradiated with 100 MeV Ni<sup>8+</sup> ion beams with different fluences from 1´10<sup>11</sup> to 1´10<sup>13</sup> ions cm<sup>−2</sup>. Analysis of the samples by X-ray diffraction show increase of average grain size from 11 nm for the pristine samples to 17 nm for the samples irradiated with 1´10<sup>11</sup> ions cm<sup>-2</sup>. The grain size remains constant at higher fluences. The UV-visible optical absorption measurement also show that band gap of nanocrystalline PbS decreases from 1.9 eV for the pristine samples to 1.7 eV for the samples irradiated with fluences of 1´10<sup>11</sup> ions cm<sup>−2 </sup>and then remains almost constant. It is observed from photoluminescence (PL) study that the PL intensity increases for irradiated samples with minimum intensity for pristine sample.
Description: 325-328
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.50(05) [May 2012]

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