| Full text | |
| Author(s): |
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: | 10 |
| 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 Opportunities: | Regular Research Grants |