Dr. A. Turak

Assistant Professor
Department of Engineering Physics

McMaster University
1280 Main Street West, Hamilton
Ontario, Canada  L8S 4L7

office: JHE A414
email: turaka@mcmaster.ca
voice:  (905) 525-9140 x23348
fax:    (905) 527-8409

B.Sc. Queens's University
Ph.D. University of Toronto

Research Interests

My research is focused on interfacial chemical and structural engineering for improved device performance in organic optoelectronic devices (opvs, oleds), and on order-disorder transitions in granular media. I was a Marie Curie Fellow at the Max-Planck-Institute for Metals Research (2008-2010), as project leader on Organic solar cells (EU IIF FP7 project: LiFOrgPV), before taking up a visiting professor position at Sabanci University in Istanbul, Turkey (EU ERG FP7 project: NIOS). 

Current research projects include: 

-- Inorganic interlayers for organic solar cells by reverse micelle reactor growth technique (NIOS) -- jointly with C. Ow-Yang, Sabanci University, Turkey

-- Interfacial structure of buried inorganic-organic interfaces in organic photovoltaics  (LiFOrganicPV)

-- Geometric packing and phase transitions in two-dimensional granular media – jointly with A. Diaz-Ortiz, Orsey, France

-- Interfacial adhesion strength at organic-inorganic heterojunctions – jointly with M. Kampermann, Wageningen University, Holland

-- Reactivity of LiF coated surfaces – jointly with L. P. H. Jeurgens, MPI-IS, Germany

-- Growth and structure of organic-organic heterojunctions – jointly with D. De Oteyza, Donostia International Physics Centre, Spain; R. Hayakawa, National Institute for Materials Science (NIMS), Japan; Y. Zhang, Nankai University, China; J. Wachtrup, University of Stuttgart, Germany.

  -- Processing effects on structure of polymer solar cells – jointly with E. Ahlswede, Center for Solar Energy and Hydrogen Research Baden-Württemberg (ZSW), Germany

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Selected Publications

T. Aytun, A. Turak, G. Halek, I. Baikie, C. Ow-Yang, “Solution-Processed LiF for Work Function Tuning in Electrode Bilayers” Nano Lett. 12  39 (2012)

A. Turak, M. Nguyen, F. Maye, J. Heidkamp, P. Lienerth, J. Wrachtrup, H. Dosch “Nanoscale engineering of donor-acceptor interfaces in organic photovoltaics” J. Nano. Res. 14, 125 (2011)

A. Turak, J. Hanisch, E. Barrena, U. Welzel, F. Widmaier, E. Ahlswede, H. Dosch. “Systematic analysis of processing parameters on the ordering and performance of working P3HT:PCBM solar cells" J. Renew. Sustain. Energ, 2, 053103 (2010).

R. Hayakawa, A. Turak, X. Zhang, H. Dosch, N. Hiroshiba, T. Chikyow, Y. Wakayama. “Strain-engineering for Controlled Growth Mode and Well-ordered Structure of Quaterrylene Thin Films" J. Chem. Phys.133 034706 (2010); Virt. J. Nanoscale Sci. Tech. 22, (August 2, 2010).

A. Turak, J. Heidkamp, H. Dosch. “Molecular heterojunction morphology on rough substrate surfaces: Component separation by Fourier subtraction” Nanotechnology 21 285705 (2010).

M. Nguyen, A. Turak, F. Maye, J. Wrachtrup, H. Dosch. “Island size effects in organic optoelectronic    devices” Proc.SPIE 7722, 772260 (2010).   

Y. Zhang, E. Barrena, X. Zhang, A. Turak, F. Maye, Helmut Dosch “New Insight into the Role of the Interfacial Molecular Structure on Growth and Scaling in Organic Heterostructures” J. Phys. Chem. C. 114, 13752–13758 (2010).

A. Turak, C. J. Huang, D. Grozea, Z.H. Lu, "Oxidation of LiF Coated Metal Surfaces:  Multilayer Cathode Structures as Used for Organic Optoelectronics" J. Electrochem. Soc. 154, H691 (2007).

D. Grozea, A. Turak, Y. Y. Yuan, S. Han, Z. H. Lu, W. Y. Kim, “Enhanced thermal stability in organic light-emitting diodes through nanocomposite buffer layers at the anode/organic interface”,  J. Appl. Phys. 101, 033522 (2007); Virt. J. Nanoscale Sci. Tech. 15, (February 26, 2007).

T.J. Clark, C.A. Jaska, A. Turak, A.J. Lough, Z.H. Lu, I. Manners,“Transition Metal-Catalyzed Dissociation of Phosphine-Gallane Adducts: Isolation of Mechanistic Model Complexes and Heterogeneous Catalyst Poisoning Studies”, Inorg. Chem., 46, 7394 (2007).

Y. Wang, N. Coombs, A. Turak,  Z. H. Lu, I. Manners, M. A. Winnik, “Interfacial Staining of a Phase-Separated Block Copolymer with Ruthenium Tetroxide”, Macromolecules, 40, 1594 (2007).

C.J. Huang, D. Grozea, A. Turak, Z.H. Lu, “Passivation effect of Al/LiF electrode on C60 devices” , Appl. Phys. Lett. 86, 033107 (2005).

A. Turak, D. Grozea, X.D. Feng, Z.H. Lu, H. Aziz, A.M. Hor, “Metal/AlQ3 interface structures”, Appl. Phys. Lett. 81, 766 (2002).

D. Grozea, A. Turak, X. D. Feng, Z.H. Lu, D. Johnson, R. Wood, “Chemical structure of Al/LiF/Alq interfaces in organic light-emitting diodes”, Appl. Phys. Lett. 81, 3173 (2002).