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      Surface engineered angstrom thick ZnO-sheathed TiO2 nanowires as photoanodes for performance enhanced dye-sensitized solar cells 

      Ulusoy, T. G.; Ghobadi, A.; Okyay, Ali Kemal (Royal Society of Chemistry, 2014)
      This paper presents a systematic study on the effects of angstrom-thick atomic layer deposited (ALD) ZnO sheaths on hydrothermally-grown TiO2 nanowires (NWs) used as photoanodes in dye-sensitized solar cells (DSSCs). We ...
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      Enhanced photoresponse of conformal TiO2/Ag nanorod array-based Schottky photodiodes fabricated via successive glancing angle and atomic layer deposition 

      Haider A.; Cansizoglu, H.; Cansizoglu, M. F.; Karabacak, T.; Okyay, Ali Kemal; Bıyıklı, Necmi (AVS Science and Technology Society, 2015)
      In this study, the authors demonstrate a proof of concept nanostructured photodiode fabrication method via successive glancing angle deposition (GLAD) and atomic layer deposition (ALD). The fabricated metal-semiconductor ...
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      Electronic and optical device applications of hollow cathode plasma assisted atomic layer deposition based GaN thin films 

      Bolat, S.; Tekcan, B.; Ozgit Akgun, C.; Bıyıklı, Necmi; Okyay, Ali Kemal (A I P Publishing LLC, 2015)
      Electronic and optoelectronic devices, namely, thin film transistors (TFTs) and metal-semiconductor-metal (MSM) photodetectors, based on GaN films grown by hollow cathode plasma-assisted atomic layer deposition (PA-ALD) ...
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      Resistive Switching based electro-optical modulation 

      Battal, E.; Ozcan, A.; Okyay, Ali Kemal (Wiley, 2014-09-08)
      Resistive switching enables optical modulation via atomic scale modifications that induce change in the refractive index of active device materials. The formation of filaments and migration of atoms around these filaments ...
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      Performance enhancement of GaN metal-semiconductor-metal ultraviolet photodetectors by insertion of ultrathin interfacial HfO2 layer 

      Kumar, M.; Tekcan, B.; Okyay, Ali Kemal (AVS Science and Technology Society, 2015)
      The authors demonstrate improved device performance of GaN metal-semiconductor-metal ultraviolet (UV) photodetectors (PDs) by ultrathin HfO2 (UT-HfO2) layer on GaN. The UT-HfO2 interfacial layer is grown by atomic layer ...
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      Enhanced Performance of Nanowire-Based All-TiO2 Solar Cells using Subnanometer-Thick Atomic Layer Deposited ZnO Embedded Layer 

      Ghobadi, A.; Yavuz, H. I.; Ulusoy, T. G.; Icli, K. C.; Ozenbas, M.; Okyay, Ali Kemal (Pergamon Press, 2015)
      In this paper, the effect of angstrom-thick atomic layer deposited (ALD) ZnO embedded layer on photovoltaic (PV) performance of Nanowire-Based All-TiO2 solar cells has been systematically investigated. Our results indicate ...
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      Superhydrophobic and omnidirectional antireflective surfaces from nanostructured ormosil colloids 

      Yildirim, A.; Khudiyev, T.; Daglar, B.; Budunoglu, H.; Okyay, Ali Kemal; Bayındır, Mehmet (American Chemical Society, 2013-02-13)
      A large-area superhydrophobic and omnidirectional antireflective nanostructured organically modified silica coating has been designed and prepared. The coating mimics the self-cleaning property of superhydrophobic lotus ...
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      Charge Trapping Memory with 2.85-nm Si-Nanoparticles Embedded in HfO2 

      El-Atab, N.; Turgut, Berk Berkan; Okyay, Ali Kemal; Nayfeh, A. (ECS, 2015-05)
      In this work, the effect of embedding 2.85-nm Si-nanoparticles charge trapping layer in between double layers of high-κ Al<inf>2</inf>O<inf>3</inf>/HfO<inf>2</inf> oxides is studied. Using high frequency (1 MHz) ...
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      Enhanced light scattering with energy downshifting using 16 nm indium nitride nanoparticles for improved thin-film a-Si N-i-P solar cells 

      Chowdhury F.I.; İslam, K.; Alkış, Sabri; Ortaç, Bülend; Alevli, Mustafa; Dietz, N.; Okyay, Ali Kemal; Nayfeh, A. (Electrochemical Society Inc., 2015-05)
      In this work the effect of Indium nitride (InN) nanoparticles (NPs) on the performance of a-Si: H solar cells has been investigated. The average J<inf>sc</inf> of InN NPs coated cells was found 6.76 mA/cm2 which is 16.69% ...
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      Amyloid-like peptide nanofiber templated titania nanostructures as dye sensitized solar cell anodic materials 

      Acar, H.; Garifullin, R.; Aygun, L. E.; Okyay, Ali Kemal; Güler, Mustafa O. (Royal Society of Chemistry, 2013)
      One-dimensional titania nanostructures can serve as a support for light absorbing molecules and result in an improvement in the short circuit current (Jsc) and open circuit voltage (Voc) as a nanostructured and high-surface-area ...
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      Okyay, Ali Kemal (47)
      Bıyıklı, Necmi (14)Bolat, S. (7)Ghobadi, A. (7)Nayfeh, A. (7)Ozgit Akgun, C. (7)Tekcan, B. (6)Battal, E. (5)Ulusoy, T. G. (5)El-Atab, N. (4)... View MoreKeywordsAtomic layer deposition (15)Deposition (12)Zinc oxide (9)Silicon (8)Temperature (6)Metals (5)Nanoparticles (5)Nanotechnology (5)Photons (5)Pulsed laser deposition (5)... View MoreDate Issued2014 (16)2016 (12)2015 (11)2017 (4)2013 (2)2018 (2)TypeArticle (39)Conference Paper (8)Has File(s)Yes (47)

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