الفهرس 
Ch. 1- Theoretical Approaches and Literature SurveyOnly 14 pages are availabe for public view
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Abstract
Due to the importance of organic materials recently because of their successful applications in optoelectronics, this thesis studies and compares the thermal, structural, optical, and electrical properties of two new compounds belonging to quinoxaline derivatives, the first abbreviated as CHMQ, and the second as CMNQ. Besides, the impact of the annealing process and their applicability in optoelectronic devices were studied.
Powder and thin-film samples of the two compounds were prepared using the thermal vacuum evaporation technique and examined by different measurement techniques. The results obtained can be summarized as follows:
The two compounds exhibited an exothermic reaction, and the melting points of CHMQ and CMNQ were 515 K and 558 K, respectively.
CHMQ and CMNQ powders display a polycrystalline structure with orthorhombic and triclinic crystal systems, respectively. CMNQ thin film was characterized by a high-intensity sharp peak, indicating the preferred orientation. The CMNQ compound showed a more ordered with roughness as low as 3.64 Å.
The CHMQ and CMNQ thin films showed high absorption and anomalous dispersion at (200-420) nm and (200-520) nm, respectively, and showed high transparency in the remaining range of the measuring spectrum. The energy gaps of CHMQ and CMNQ were calculated as 3.19 eV and 2.89 eV, respectively, and decreased with the annealing process.
The appropriate proposed conduction mechanism in CHMQ and CMNQ is the correlated barrier hopping (CBH) model. The current-voltage curves of CMNQ showed a higher response to illumination, which suggests its use in organic photodetectors applications.