Browsing by Author "Yakuphanoglu, Fahrettin"

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Dye Sensitized Solar Cell-Based Optoelectronic Device Using Novel [Ru(l1)(l2)(ncs)2] Complex
(Elsevier, 2021) Dayan, Osman; Imer, Arife Gencer; Tercan, Melek; Dere, Aysegul; Al-Sehemi, Abdullah G.; Al-Ghamdi, Ahmed A.; Yakuphanoglu, Fahrettin
A dye sensitized solar cell-based photodiode was prepared using novel [Ru(L1)(L2)(NCS)(2)] complex for solar energy and optoelectronic applications. The new heteroleptic ruthenium(II) complex [Ru(L1)(L2)(NCS)(2)], was synthesized from the reaction of (pyridyl)benzimidazole ligands. The possible usage of [Ru(L1)(L2)(NCS)(2)] complex in dye synthesized solar cell-based photodiode was investigated using electrical and capacitance characteristics. The device was irradiated under various solar light intensities. The change in photocurrent of the device confirms the photoconducting behavior of prepared device. The device exhibited both the photocapacitance and photoresponse behavior with solar illumination. The obtained optoelectrical results suggest that the studied photodiode with [Ru(L1)(L2)(NCS)(2)] complex could be used in optoelectronic device for optical switching and controlling applications. (C) 2021 Elsevier B.V. All rights reserved.
Photosensing Properties of Ruthenium(Ii) Complex-Based Photodiode
(Springer Heidelberg, 2019) Imer, Arife Gencer; Dere, Aysegul; Al-Sehemi, Abdullah G.; Dayan, Osman; Serbetci, Zafer; Al-Ghamdi, Ahmed A.; Yakuphanoglu, Fahrettin
Ru(II) complex containing 2,6-di(1H-pyrazol-3-yl)pyridine ligand was synthesized to prepare organic-based photodiode. After forming the back contact with aluminum metal on p-Si by thermal evaporation, Al/Ru(II) complex/p-Si heterojunction was constructed by inserting Ru(II) complex organic layer into Si substrate. The fundamental electrical parameters and photosensing properties of fabricated heterojunction were investigated by current-voltage and capacitance-voltage measurements under the dark and different light intensities. The studied device exhibits a good rectifying property with rectification ratio of 2.4x10(4) at +/- 7V. It is observed that the photosensing properties such as light sensitivity and photoconductive responsivity of the photodiode based on Ru(II) complex are strongly dependent on the illumination power. The transient measurements show that the heterojunction device has a good photo switching property in the application of the photodiode, photoconductor and photocapacitor. The obtained results declare that the fabricated Ru(II)-based heterojunction device can be used in the organic-based optoelectronic device applications as a photodiode, photosensor, and optical sensor.