کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1517711 | 1511610 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Molecular materials derived from MPc (M=Fe, Pb, Co) and 1,8-dihydroxiantraquinone thin films: Formation, electrical and optical properties
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Molecular materials derived from MPc (M=Fe, Pb, Co) and 1,8-dihydroxiantraquinone thin films: Formation, electrical and optical properties Molecular materials derived from MPc (M=Fe, Pb, Co) and 1,8-dihydroxiantraquinone thin films: Formation, electrical and optical properties](/preview/png/1517711.png)
چکیده انگلیسی
Semiconductor-like thin films were grown using metallic phthalocyanines (MPc) (M=Fe, Pb, Co) and 1,8 dihydroxiantraquinone as initial compounds. The morphology of the deposited films was studied by using scanning electron microscopy and atomic force microscopy. The powder and thin-film samples of the synthesized materials, deposited by vacuum thermal evaporation, showed the same intra-molecular bonds as in IR spectroscopy studies, which suggests that the evaporation process does not alter these bonds. The optical band gap values of C60H28N8O8Fe, C60H28N8O8Pb and C60H28N8O8Co calculated from the absorption coefficient were found to be 1.60, 1.89 and 1.75 eV, respectively, arising from non-direct transitions. The effect of temperature on conductivity was also measured in these samples. It was found that the temperature-dependent electric current in all cases showed a semiconductor behavior with conductivities in the order of 10â6 Ωâ1 cmâ1 where the highest value corresponded to the cobalt material. The linear dependence observed in the films implies only one type of conduction mechanism in all cases, with mean activation energies of the order of 1.55, 1.77 and 1.50 eV for iron, lead and cobalt-based thin films, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 69, Issue 1, January 2008, Pages 1-7
Journal: Journal of Physics and Chemistry of Solids - Volume 69, Issue 1, January 2008, Pages 1-7
نویسندگان
M.E. Sánchez Vergara, A. Ortiz Rebollo, J.R. Alvarez, M. Rivera,