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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Polycrystalline lead iodide films produced by solution evaporation and tested in the mammography X-ray energy range

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Author(s):
Condeles, J. F. [1] ; Mulato, M. [2]
Total Authors: 2
Affiliation:
[1] Univ Fed Triangulo Mineiro, Inst Exact Sci Nat & Educ, Dept Phys, BR-38064200 Uberaba, MG - Brazil
[2] Univ Sao Paulo, Dept Phys, Fac Philosophy Sci & Letters Ribeirao Preto, BR-14040901 Ribeirao Preto, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS; v. 89, p. 39-44, FEB 2016.
Web of Science Citations: 8
Abstract

Lead iodide polycrystalline films have been deposited on corning glass substrates using solution evaporation in oven. Films 6 mu m-thick were obtained with full coverage of the substrates as verified by scanning electron microscopy. Some pin-holes were observable. X-ray diffraction revealed a crystalline structure corresponding to the 4 H-PbI2 polytype formation. Polarized Raman scattering experiments indicated a lamellar structure. Anisotropy was also investigated using depolarization ratio calculations. The optical and electrical properties of the samples were investigated using photoluminescence and dark conductivity as a function of temperature, respectively. Activation energies of 0.10 up to 0.89 eV were related to two main electrical transport mechanisms. Films were also exposed to X-ray irradiation in the mammography X-ray energy range. The detector produced was also exposed to X-ray from 5 mR up to 1450 mR. A linear response was observed as a function of dose with a slope of 0.52 nA/mm(2) per mR. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 14/09562-4 - Microelectronic biossensors associated with electrochemical techniques
Grantee:Marcelo Mulato
Support type: Regular Research Grants