Optoelectronic properties of 3-acetyl-6-bromocoumarin compound in various solvents and concentrations

Adnan Kurt, Bayram Gündüz, Zülfiye Ilter, Murat Koca


In present study, the optoelectronic parameters such as absorbance band edge, mass extinction coefficient, optical band gap, refractive index, real and imaginary parts of complex dielectric constant, incidence and refraction angle, contrast, optical and electrical conductance of a coumarin derived compound, 3-acetyl-6-bromocoumarin (ABRC), were investigated for various solvents and concentrations. The optical band gap values of 3-acetyl-6-bromocoumarin in DMF and DMSO solvents were found to be 3.110 eV and 3.092 eV at the same concentration of 120 µM, respectively. On the other hand, the optical band gap of the 3-acetyl-6-bromocoumarin decreases from 3.151 to 2.823 eV with increasing concentration from 27 µM to 23 mM. The refractive indices of 3-acetyl-6-bromocoumarin for different solvents and concentrations and also based on the optical band gap relations such as Herve-Vandamme, Kumar-Singh, Moss, Ravindra and Reddy were discussed in detail. All the obtained results were compared with each other. The results show that the ABRC material exhibits semiconductor behavior and can be used optoelectronic devices such diode and sensor.


Coumarin; optoelectronic properties; optical and electrical conductance; semiconductor; solvent and concentration effect

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