Electrical and photoelectrical characterization of an organic–inorganic heterojunction based on quinoline yellow dye |
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| Affiliation: | 1. Department of Physics, Faculty of Science, Yuzuncu Yil University, 65080 Van, Turkey;2. Department of Science, Faculty of Education, Dicle University, 21280 Diyarbakir, Turkey;3. Science and Technology Application and Research Center, Dicle University, 21280 Diyarbakir, Turkey;1. Lesya Ukrainka Eastern European National University, 43025 Lutsk, Ukraine;2. Semiconductor Physics Department and Institute of Applied Research, Vilnius University, Saul?tekio al. 9, bldg.3, LT-10222 Vilnius, Lithuania;1. Thin Films Laboratory, Physics Department, Faculty of Science, Suez Canal University, 41522 Ismailia, Egypt;2. Physics Department, Faculty of Science and Arts, 65931, AlMikhwah, AlBaha University, AlBaha, Saudi Arabia;3. Department of Sciences and Technology, Rania University College, Taif University, Rania 12975, Saudi Arabia;4. Department of Physics, Turabah University College, Taif University, Turabah 21995, Saudi Arabia;5. Department of Physics, Damietta Cancer Institute, Damietta, Egypt;1. Basic Science Department, High Institute of Engineering and Technology, El-Arish, North Sinai, Egypt;2. Department of Physics, Faculty of Science at New Damietta, Damietta University, 34517 New Damietta, Egypt;3. Solid State Electronics Laboratory, Solid State Physics Department, Physics Division, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt;1. Department of Physics, Faculty of Science, University of Yüzüncü Y?l, 65080 Van, Turkey;2. Department of Chemistry, Faculty of Science, University of Yüzüncü Y?l, 65080 Van, Turkey;3. Department of Chemistry, Faculty of Science and Arts, University of Gaziantep, 27310 Gaziantep, Turkey;1. Department of Physics, Faculty of Applied Medical Sciences at Turabah, Taif University, 21995, Saudi Arabia;2. Department of Physics, Faculty of Science, Damietta University, 34517 Damietta, Egypt;3. Department of Physics, Damietta Cancer Institute, Damietta, Egypt |
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| Abstract: | An organic–inorganic contact was fabricated by forming a thin film of quinoline yellow dye (QY) on a p-Si wafer and evaporating Al metal on the film. The current–voltage (I–V) and capacitance–voltage (C–V) measurements of Al/QY/p-Si heterostructure were applied in dark and room temperature to calculate the characteristic parameters of diode like ideality factor, barrier height and series resistance. Ideality factor and barrier height values were found as 1.23 and 0.87 eV from I–V data, respectively. The series resistance value of the device was determined as 1.8 kΩ by using modified Norde function. The C–V measurements were carried out at different frequencies and it was seen that capacitance value decreased with increasing frequency. Interface state density distribution was calculated by means of I–V measurement. In addition the optical absorption of thin QY film on glass was measured and optical band gap of the film was found as 2.73 eV. Furthermore, I–V measurements of Al/QY/p-Si/Al were taken under illumination between 40 and 100 mW/cm2. It was observed that reverse bias current of the device increased with light intensity. Thus, the heterojunction had a strong response to the light and it can be suitable for electrical and optoelectronic applications like a photodiode. |
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| Keywords: | Organic dye Heterojunction Barrier height Series resistance |
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