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BETA
Pehlivan, Esat
Alternative names
Publications (10 of 17) Show all publications
Bayrak Pehlivan, I., Marsal, R., Pehlivan, E., Runnerstrom, E. L., Milliron, D. J., Granqvist, C.-G. & Niklasson, G. (2014). Electrochromic Devices with Polymer Electrolytes Functionalized by SiO2 and In2O3:Sn Nanoparticles: Rapid Coloration/Bleaching Dynamics and Strong Near-Infrared Absorption. Solar Energy Materials and Solar Cells, 126, 241-247
Open this publication in new window or tab >>Electrochromic Devices with Polymer Electrolytes Functionalized by SiO2 and In2O3:Sn Nanoparticles: Rapid Coloration/Bleaching Dynamics and Strong Near-Infrared Absorption
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2014 (English)In: Solar Energy Materials and Solar Cells, ISSN 0927-0248, E-ISSN 1879-3398, Vol. 126, p. 241-247Article in journal (Refereed) Published
National Category
Engineering and Technology Nano Technology
Identifiers
urn:nbn:se:uu:diva-284199 (URN)
Available from: 2016-04-15 Created: 2016-04-15 Last updated: 2018-08-30
Pehlivan, I. B., Marsal, R., Pehlivan, E., Runnerstrom, E. L., Milliron, D. J., Granqvist, C.-G. & Niklasson, G. A. (2014). Electrochromic Devices with Polymer Electrolytes Functionalized by SiO2 and In2O3:Sn Nanoparticles: Rapid Coloring/Bleaching Dynamics and Strong Near-Infrared Absorption. Paper presented at 10th International Meeting on Electrochromism (IME), Holland, MI, August 12-16, 2012. Solar Energy Materials and Solar Cells, 126, 241-247
Open this publication in new window or tab >>Electrochromic Devices with Polymer Electrolytes Functionalized by SiO2 and In2O3:Sn Nanoparticles: Rapid Coloring/Bleaching Dynamics and Strong Near-Infrared Absorption
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2014 (English)In: Solar Energy Materials and Solar Cells, ISSN 0927-0248, E-ISSN 1879-3398, Vol. 126, p. 241-247Article in journal (Refereed) Published
Abstract [en]

We studied the optical properties and coloring/bleaching dynamics of electrochromic devices based on tungsten oxide and nickel oxide and incorporating polymer electrolytes functionalized by adding about one percent of nanoparticles of SiO2 (fumed silica) or In2O3:Sn. SiO2 improved the coloring/bleaching dynamics and In2O3:Sn quenched the near-infrared transmittance. Both of these effects can be important in electrochromic smart windows, and our results point at the advantage of a polymer laminated construction over a monolithic one.

National Category
Nano Technology
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
urn:nbn:se:uu:diva-204448 (URN)10.1016/j.solmat.2013.06.010 (DOI)000338395100035 ()
Conference
10th International Meeting on Electrochromism (IME), Holland, MI, August 12-16, 2012
Available from: 2013-08-05 Created: 2013-08-05 Last updated: 2017-12-06Bibliographically approved
Sorar, I., Pehlivan, E., Niklasson, G. A. & Granqvist, C.-G. (2014). Electrochromism of DC magnetron sputtered TiO2: Role of film thickness. Applied Surface Science, 318, 24-27
Open this publication in new window or tab >>Electrochromism of DC magnetron sputtered TiO2: Role of film thickness
2014 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 318, p. 24-27Article in journal (Refereed) Published
Abstract [en]

Titanium dioxide films were prepared by reactive DC magnetron sputtering and the role of the film thick-ness d on the electrochromism was analyzed for 100 < d < 400 nm. The best properties were obtainedfor the thickest films, which yielded a mid-luminous transmittance modulation of 58% and a corre-sponding coloration efficiency of 26.3 cm2/C. The films were amorphous according to X-ray diffractionmeasurements and showed traces of adsorbed water as revealed by infrared spectroscopy.

Place, publisher, year, edition, pages
Elsevier, 2014
National Category
Materials Engineering
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
urn:nbn:se:uu:diva-234914 (URN)10.1016/j.apsusc.2013.12.015 (DOI)000344380500006 ()
Projects
EU GRINDOOR
Funder
EU, FP7, Seventh Framework Programme, 267345
Available from: 2014-10-27 Created: 2014-10-27 Last updated: 2017-12-05Bibliographically approved
Sorar, I., Pehlivan, E., Niklasson, G. & Granqvist, C.-G. (2014). Electrochromism of DC Magnetron-Sputtered TiO2: Role of Film Thickness. Applied Surface Science, 318, 24-27
Open this publication in new window or tab >>Electrochromism of DC Magnetron-Sputtered TiO2: Role of Film Thickness
2014 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 318, p. 24-27Article in journal (Refereed) Published
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-284419 (URN)
Available from: 2016-04-18 Created: 2016-04-18 Last updated: 2018-08-30
Granqvist, C.-G., Bayrak Pehlivan, I., Ji, Y.- . X., Li, S.-Y., Pehlivan, E., Marsal, R. & Niklasson, G. (2013). Electrochromics and Thermochromics for Energy Efficient Fenestration: New Applications Based on Transparent Conducting Nanoparticles. Materials Research Society Symposium Proceedings, 1558, 12 p., Article ID mrs13-1558-z09.
Open this publication in new window or tab >>Electrochromics and Thermochromics for Energy Efficient Fenestration: New Applications Based on Transparent Conducting Nanoparticles
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2013 (English)In: Materials Research Society Symposium Proceedings, ISSN 0272-9172, E-ISSN 1946-4274, Online Library, Vol. 1558, p. 12 p.-, article id mrs13-1558-z09Article in journal (Refereed) Published
National Category
Engineering and Technology Nano Technology
Identifiers
urn:nbn:se:uu:diva-285231 (URN)
Available from: 2016-04-19 Created: 2016-04-19 Last updated: 2018-08-30
Sorar, I., Pehlivan, E., Niklasson, G. A. & Granqvist, C.-G. (2013). Electrochromism of DC magnetron sputtered TiO2 thin films: Role of deposition parameters. Solar Energy Materials and Solar Cells, 115, 172-180
Open this publication in new window or tab >>Electrochromism of DC magnetron sputtered TiO2 thin films: Role of deposition parameters
2013 (English)In: Solar Energy Materials and Solar Cells, ISSN 0927-0248, E-ISSN 1879-3398, Vol. 115, p. 172-180Article in journal (Refereed) Published
Abstract [en]

We performed a comprehensive study on the electrochromism in TiO2 thin films made by reactive DC magnetron sputtering and elucidated the roles of sputter gas pressure p, O-2/Ar gas ratio gamma and substrate temperature tau(s). Good mid-luminous optical modulation taken to be similar to 50% in similar to 200-nm-thick films was obtained under charge exchange in a Li+ electrolyte for p > 15 mTorr and tau(s) < 100 degrees C, whereas gamma was less important. The deposition rate dropped for increasing p, and hence p approximate to 15 mTorr was optimal. These films were X-ray amorphous and contained some water. The coloration efficiency eta was 25 cm(2)/C, which exceeds data on eta in most prior studies on sputter deposited TiO2 and verifies that such films can display the same values of eta as those of TiO2 films made by several chemical techniques.

Keywords
Electrochromism, Thin films, Titanium dioxide, Sputter deposition, Deposition parameters
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
urn:nbn:se:uu:diva-204258 (URN)10.1016/j.solmat.2013.03.035 (DOI)000320681700025 ()
Available from: 2013-07-30 Created: 2013-07-29 Last updated: 2017-12-06Bibliographically approved
Tatar, B., Gokdemir, F. P., Pehlivan, E. & Urgen, M. (2013). The influence of Er3+ doping on the structural and optical properties of CeO2 thin films grown by PED. Applied Surface Science, 285(Part B), 409-416
Open this publication in new window or tab >>The influence of Er3+ doping on the structural and optical properties of CeO2 thin films grown by PED
2013 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 285, no Part B, p. 409-416Article in journal (Refereed) Published
Abstract [en]

Erbium doped CeO2 thin films were deposited on both Corning glass substrates and indium doped tin oxide (ITO) coated glass substrates by pulsed e-beam deposition (PED) method at room temperature. Structural features of Er doped CeO2 thin films were studied with X-ray diffraction (XRD) and micro-Raman spectra. The XRD patterns of all films showed polycrystalline nature and cubic crystalline structure. Raman active peaks for both undoped CeO2 and Er doped CeO2 films were determined at similar to 465 cm(-1). The Raman shift observed in this study can also be assigned to Raman active modes of CeO2 that are shifted from the original position due to different doping concentration. The optical properties of CeO2 films and Er doped CeO2 films, which were determined from transmittance and reflectance measurements at room temperature, were very similar in character. The refractive indices and extinction coefficients, which were calculated from 3.5 to 1.25 eV (300-1000 nm), were between 1.5-3 and 0.05-0.2, respectively. The optical band gaps were deduced from the absorption coefficient according to solid band theory. The electrochromic measurements revealed that 2% Er doped CeO2 films grown on ITO + WO3 substrates had highest charge density compared to the other samples. Long-time cyclic voltammetry (CV) and chronoamperometry (CA) measurements were carried out to investigate the stability of this film.

Keywords
Electrochromic materials, CeO2 crystal structure, Er doping, Optical properties, Electrochemical properties
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
urn:nbn:se:uu:diva-212855 (URN)10.1016/j.apsusc.2013.08.068 (DOI)000326579400043 ()
Available from: 2013-12-17 Created: 2013-12-16 Last updated: 2017-12-06Bibliographically approved
Bayrak Pehlivan, I., Marsal, R., Pehlivan, E., Runnerstrom, E. L., Milliron, D. J., Granqvist, C.-G. & Niklasson, G. A. (2012). Electrochromic device application of PEI:LiTFSI-based polymer electrolytes with added SiO2 and In2O3:Sn nanoparticles.. In: IME-10. Tenth International meeting on Electrochromism, Holland, MI USA, August 12-16, 2012.: . Paper presented at IME-10. Tenth International meeting on Electrochromism, Holland, MI USA, August 12-16, 2012. (pp. 8).
Open this publication in new window or tab >>Electrochromic device application of PEI:LiTFSI-based polymer electrolytes with added SiO2 and In2O3:Sn nanoparticles.
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2012 (English)In: IME-10. Tenth International meeting on Electrochromism, Holland, MI USA, August 12-16, 2012., 2012, p. 8-Conference paper, Oral presentation with published abstract (Refereed)
National Category
Condensed Matter Physics Engineering and Technology
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
urn:nbn:se:uu:diva-187681 (URN)
Conference
IME-10. Tenth International meeting on Electrochromism, Holland, MI USA, August 12-16, 2012.
Available from: 2012-12-10 Created: 2012-12-10 Last updated: 2016-04-20
Sorar, I., Pehlivan, E., Niklasson, G. A. & Granqvist, C.-G. (2012). Electrochromic properties of TiO2 thin films deposited by DC magnetron sputtering: The effect of total gas pressure and oxygen gas flow rate.. In: IME-10. Tenth International meeting on Electrochromism, Holland, MI USA, August 12-16, 2012.: . Paper presented at IME-10. Tenth International meeting on Electrochromism, Holland, MI USA, August 12-16, 2012. (pp. 40).
Open this publication in new window or tab >>Electrochromic properties of TiO2 thin films deposited by DC magnetron sputtering: The effect of total gas pressure and oxygen gas flow rate.
2012 (English)In: IME-10. Tenth International meeting on Electrochromism, Holland, MI USA, August 12-16, 2012., 2012, p. 40-Conference paper, Oral presentation with published abstract (Refereed)
National Category
Condensed Matter Physics Engineering and Technology
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
urn:nbn:se:uu:diva-187679 (URN)
Conference
IME-10. Tenth International meeting on Electrochromism, Holland, MI USA, August 12-16, 2012.
Available from: 2012-12-10 Created: 2012-12-10 Last updated: 2015-01-07
Green, S. V., Pehlivan, E., Granqvist, C.-G. & Niklasson, G. A. (2012). Electrochromism in sputter deposited nickel-containing tungsten oxide films. Solar Energy Materials and Solar Cells, 99, 339-344
Open this publication in new window or tab >>Electrochromism in sputter deposited nickel-containing tungsten oxide films
2012 (English)In: Solar Energy Materials and Solar Cells, ISSN 0927-0248, E-ISSN 1879-3398, Vol. 99, p. 339-344Article in journal (Refereed) Published
Abstract [en]

Thin films of NixW1-x oxide were prepared by reactive DC magnetron co-sputtering and were investigated by optical and electrochemical measurements. Electrochromism was found only for 0<x<0.3 but not for 0.3<x<0.6, though films with x~0.4 could still sustain reversible charge insertion. The coloration efficiency was largest for 0.10<x<0.15. The charge capacity of the NixW1-x oxide films decreased upon increasing the value of x as a consequence of a decreasing ion diffusion coefficient leading to slower kinetics.

National Category
Materials Engineering
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
urn:nbn:se:uu:diva-178580 (URN)10.1016/j.solmat.2011.12.025 (DOI)000301167200048 ()
Funder
Swedish Research CouncilEU, FP7, Seventh Framework Programme, 211948Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning
Available from: 2012-07-31 Created: 2012-07-31 Last updated: 2017-12-07Bibliographically approved
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