Browsing by Author "Unal, F."

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    Investigation of photodetector and photovoltaic properties of H2Pc/CuO and H2Pc/ITO junctions produced with modified H2Pc
    (Springer Nature, 2024) Unal, F.; Aktas, S.; Kurt, M.S.; Koc, M.M.; Arslan, T.; Coskun, B.; Gur, M.
    In this work, it was aimed to provide an alternative to organic-based photodiode detectors (OPDs), solar cell with the modified H2Pc organic thin film heterojunctions. For this purpose, the modified H2Pc organic thin film was grown on ITO/glass and CuOx/ITO/glass substrates via thermal evaporation method and their optoelectronic properties were compared with each other and other organic-based devices. The crucial optical parameters of the fabricated heterojunctions were determined in the wavelengths range of 300–800 nm. In order to perform electrical characterisation, Ag metal contacts were grown on the heterojunctions and Ag/H2Pc/ITO/Ag and Ag/H2Pc/CuOx/Ag devices were fabricated. Diode, photovoltaic and photodetector parameters of the fabricated devices were investigated in the applied potential of ± 3 V under dark and several light intensities. Ultimately, it can be stated that the fabricated devices may offer an alternative to OPDs and organic-based solar cell.Please check and confirm the author names and initials are correct. Also, kindly confirm the details in the metadata are correct.I confirm that the author names are correct Graphical abstract: (Figure presented.).
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    Web of Science
    Photodetector performance analysis of a hybrid MnPc/DLC device with high photoresponsivity, sensitivity, and On/Off ratio
    (2024.01.01) Unal, F.; Aktas, S.; Kurt, M.S.; Koc, M.M.; Coskun, B.; Aslan, N.; Arslan, T.; Gur, M.
    The fabrication and characterization of high-performance devices for optoelectronic applications, particularly their response to incident light, are crucial. In this study, a MnPc/DLC device was fabricated using thermal evaporation and magnetron sputtering techniques, and its fundamental optoelectronic properties were characterised. Key diode parameters including barrier height, ideality factor, reverse saturation current, series resistance, and shunt resistance were determined using several methods, such as TE, Ohm's Law, the modified Norde method, and the Mikhelashvili method. The results from these methods were found to be consistent with varying light intensities. Additionally, photodetector parameters of the MnPc/DLC device were measured at +/- 1 V under light intensities of 20, 40, 60, 80, and 100 mW/cm(2), and the findings were compared with the literature. The maximum values for photocurrent, photoresponsivity, photosensitivity, specific detectivity, and on/off ratio were 6.41 x 10(-2) A, 2.49 A/W, 2.02 x 10(5), 5.8 x 10(9) Jones and 2.06 x 10(3), respectively. Notably, the photocurrent, photoresponsivity, photosensitivity, and on/off ratio values were found to be significantly higher and more promising compared to those reported in the literature.