Electrical and optical properties of an organic semiconductor metal-free phthalocyanine (C32H18N8)
| Autor: | L. Moazzami Goodarzi, J. Baedi, M.E. Azim-Araghi |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Absorption spectroscopy
Chemistry Band gap Nanotechnology Condensed Matter Physics Molecular physics Electronic Optical and Magnetic Materials Organic semiconductor Density of states Density functional theory Absorption (electromagnetic radiation) Electronic band structure Instrumentation Refractive index |
| Zdroj: | The European Physical Journal Applied Physics. 58:30201 |
| ISSN: | 1286-0050 1286-0042 |
| DOI: | 10.1051/epjap/2012120062 |
| Popis: | In a recent work we calculated some electronic properties of metal-free phthalocyanine such as band structure, density of states and energy gap. We have also presented some optical properties such as dielectric function, electrical loss function, optical conduction, absorption and refractive index, some of which have never been studied before. Calculations were performed in the framework of density functional theory (DFT), using the full-potential linearized augmented plane wave (FP-LAPW) method. This study presents the electrical gap energy of metal-free phthalocyanine to be Eg = 2.4 eV which is in good agreement with experimental data. A trap energy level is also observed. Optical band gap is about 2.48 eV with an optical trap level at 1.48 eV. In addition, we obtained the static refractive index in the x-, y- and z-directions as n0xx = 2.43, n0yy = 2.06 and n0zz = 2.32. Finally, absorption spectra display the existence of strong absorption bands at the wavelengths of 400 and 800 nm which compare favorably with experimental results. |
| Databáze: | OpenAIRE |
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