Amorphous Semiconductors Laboratory

About

In Amorphous Semiconductors Research Laboratory, amorphous and/or nano/microcrystalline silicon thin films, anti-reflecting coatings have been produced; also their electronic and optical properties have been investigated. A capacitively coupled plasma enhanced chemical vapour deposition (PECVD) system for the production of the samples is used. A physical vapour evaporator system is used for electrical contacts. As for optical and electrical characterisations, transmission and reflection measurements have been performed. Moreover, temperature dependent dark conductivity, constant photocurrent method (CPM) and photoluminescence measurements are among the other facilities.

Research Infrastructure

  • Plasma Enhanced Chemical Vapor Deposition (PECVD)
  • Fourier Transform Photoconductivity (FTPS)
  • Photoluminescence (PL)
  • Constant Photocurrent Method (CPM)
  • Dual-Beam Photocurrent Method (DBM)
  • Dual-beam Photoconductivity Method (DBP)
  • Current-Voltage (I-V)
  • Optical Transmittance and Reflectance (T-R)
  • Temperature Dependence Dark Current Activation (IT)
  • Capacitance-Voltage (C-V)
  • Evaporator (EVA)
  • Closed Cycle He Refrigerator (IGLO)
  • Annealing Furnaces (ISOT)

Researchers

•    Prof. Dr. Akın Bacıoğlu

Ongoing Projects

Completed Projects

Publications

  • Aslı Doğan, Akın Bacıoğlu  “Design of a passive optical athermalization of dual-band IR Seeker for precision guided-systems”, Journal of Modern Optics, 68(11), (2021), 593-603. https://doi.org/10.1080/09500340.2021.1937734
  • Begüm Çınar Bam, Kemal Rüzgar, Akın Bacıoğlu, Semra İde  “Structural analysis of hydrogenated nano-crystalline silicon suboxide (nc-SiOx H, x 1) thin films with SAXS for a potential application as phase change material” Surface and Coatings Technology, 374, (2019), 164-170. https://doi.org/10.1016/j.surfcoat.2019.05.083
  • Kemal Rüzgar, Akın Bacıoğlu, “Effect of gradual widening of d/w-ratio on optical performance of photon sieves produced by two maskless lithography techniques: lift-off and chemical etching”, Journal of Modern Optics, 67(15), (2020), 1304-1313. https://doi.org/10.1080/09500340.2020.1844911
  • Kemal Rüzgar, Akın Bacıoğlu, “Process optimization of parameterized single shot method for a rapid production of photon sireve with direct write lithography”, Microelectronic Engineering, 209, (2019), 41-48. https://doi.org/10.1016/j.mee.2019.03.014
  • H.S. Salman, A. Bacıoğlu, S.K. Eken, “Crystallization of hydrogenated amorphous silicon thin film on glass by using ns-pulsed fiber laser operating at 1064 nm”, Materials Science in Semiconductor Processing, 95, (2019), 20-27. https://doi.org/10.1016/j.mssp.2019.02.006
  • H. Ertap, A. Bacioglu, M. Karabulut, Photoluminescence properties of boron doped InSe single crystals, Journal of Luminescence, 167, (2015), 227-232. http://dx.doi.org/10.1016/j.jlumin.2015.06.045
  • A.Bacıoğlu, H. Ertap, M. Karabulut ve G.M. Mamedov, “Sub-bandgap Analysis of Boron Doped InSe Single Crystals by Constant Photocurrent Method”, Optical Materials, 37 (2014), 70-73.  https://doi.org/10.1016/j.optmat.2014.04.047
  • A. Bacıoğlu, U.Kazan, S.İde, "Single and Multilayered a-SiOx:H (x<1) Thin Film Samples Analyzed by Optical Absorption and Small-Angle X-ray Scattering", Materials Chemistry and Physics, 146, (2014) 425-430 https://doi.org/10.1016/j.matchemphys.2014.03.048
  • H. Ertap, G.M. Mamedov, M. Karabulut, A. Bacıoglu, “Pool–Frenkel thermoelectric modulation of exciton photoluminescence in GaSe crystals” Journal of Luminescence, 131(7), (2011), 1376-9.https://doi.org/10.1016/j.jlumin.2011.03.037
  • G.M. Mamedov, M. Karabulut, H.Ertap, A. O.Kodolbas, Ö. Öktü, A. Bacıoğlu, “Exciton photoluminescence, photoconductivity and absorption in GaSe0.9Te0.1 alloy crystals”, Journal of Luminescence, 129, (2009), 226-30, https://doi.org/10.1016/j.jlumin.2008.09.015
  • A.Bacıoğlu, A.O.Kodolbaş, Ö.Öktü, “Temperature dependent photoluminescence of PECVD a-SiOx:H (x<2)”, Journal of Luminescence 130, (2010), 1730-7. https://doi.org/10.1016/j.jlumin.2010.04.001
  • A.Bacıoğlu, A.O.Kodolbaş, Ö.Öktü, “ Deposition of highly photoconductive wide band gap a-SiOx:H thin films at a high temperature without H2 dilution” Solar Energy Materials and Solar Cells, 89 (1), (2005), 49-59, https://doi.org/10.1016/j.solmat.2005.01.001
  • A.O.Kodolbaş, B.Çomak, A.Bacıoğlu, Ö.Öktü, "Lateral photovoltage measurements in hydrogenated amorphous silicon and silicon-oxygen thin films ", Journal of Non-Crystalline Solids, 351-5, (2005), 426-31, https://doi.org/10.1016/j.jnoncrysol.2005.01.005
  • A.Bacıoğlu, A.O.Kodolbaş, Ö.Öktü, " Optimization of the RF power density to obtain good quality hydrogenated amorphous silicon films in a home made glow discharge system", Optical Materials, 25, (2004), 335-9, https://doi.org/10.1016/j.optmat.2003.08.004

Links

https://avesis.hacettepe.edu.tr/bacioglu
https://yunus.hacettepe.edu.tr/~bacioglu/index.html
 

About

In Amorphous Semiconductors Research Laboratory, amorphous and/or nano/microcrystalline silicon thin films, anti-reflecting coatings have been produced; also their electronic and optical properties have been investigated. A capacitively coupled plasma enhanced chemical vapour deposition (PECVD) system for the production of the samples is used. A physical vapour evaporator system is used for electrical contacts. As for optical and electrical characterisations, transmission and reflection measurements have been performed. Moreover, temperature dependent dark conductivity, constant photocurrent method (CPM) and photoluminescence measurements are among the other facilities.

Research Infrastructure

  • Plasma Enhanced Chemical Vapor Deposition (PECVD)
  • Fourier Transform Photoconductivity (FTPS)
  • Photoluminescence (PL)
  • Constant Photocurrent Method (CPM)
  • Dual-Beam Photocurrent Method (DBM)
  • Dual-beam Photoconductivity Method (DBP)
  • Current-Voltage (I-V)
  • Optical Transmittance and Reflectance (T-R)
  • Temperature Dependence Dark Current Activation (IT)
  • Capacitance-Voltage (C-V)
  • Evaporator (EVA)
  • Closed Cycle He Refrigerator (IGLO)
  • Annealing Furnaces (ISOT)

Researchers

•    Prof. Dr. Akın Bacıoğlu

Ongoing Projects

Completed Projects

Publications

  • Aslı Doğan, Akın Bacıoğlu  “Design of a passive optical athermalization of dual-band IR Seeker for precision guided-systems”, Journal of Modern Optics, 68(11), (2021), 593-603. https://doi.org/10.1080/09500340.2021.1937734
  • Begüm Çınar Bam, Kemal Rüzgar, Akın Bacıoğlu, Semra İde  “Structural analysis of hydrogenated nano-crystalline silicon suboxide (nc-SiOx H, x 1) thin films with SAXS for a potential application as phase change material” Surface and Coatings Technology, 374, (2019), 164-170. https://doi.org/10.1016/j.surfcoat.2019.05.083
  • Kemal Rüzgar, Akın Bacıoğlu, “Effect of gradual widening of d/w-ratio on optical performance of photon sieves produced by two maskless lithography techniques: lift-off and chemical etching”, Journal of Modern Optics, 67(15), (2020), 1304-1313. https://doi.org/10.1080/09500340.2020.1844911
  • Kemal Rüzgar, Akın Bacıoğlu, “Process optimization of parameterized single shot method for a rapid production of photon sireve with direct write lithography”, Microelectronic Engineering, 209, (2019), 41-48. https://doi.org/10.1016/j.mee.2019.03.014
  • H.S. Salman, A. Bacıoğlu, S.K. Eken, “Crystallization of hydrogenated amorphous silicon thin film on glass by using ns-pulsed fiber laser operating at 1064 nm”, Materials Science in Semiconductor Processing, 95, (2019), 20-27. https://doi.org/10.1016/j.mssp.2019.02.006
  • H. Ertap, A. Bacioglu, M. Karabulut, Photoluminescence properties of boron doped InSe single crystals, Journal of Luminescence, 167, (2015), 227-232. http://dx.doi.org/10.1016/j.jlumin.2015.06.045
  • A.Bacıoğlu, H. Ertap, M. Karabulut ve G.M. Mamedov, “Sub-bandgap Analysis of Boron Doped InSe Single Crystals by Constant Photocurrent Method”, Optical Materials, 37 (2014), 70-73.  https://doi.org/10.1016/j.optmat.2014.04.047
  • A. Bacıoğlu, U.Kazan, S.İde, "Single and Multilayered a-SiOx:H (x<1) Thin Film Samples Analyzed by Optical Absorption and Small-Angle X-ray Scattering", Materials Chemistry and Physics, 146, (2014) 425-430 https://doi.org/10.1016/j.matchemphys.2014.03.048
  • H. Ertap, G.M. Mamedov, M. Karabulut, A. Bacıoglu, “Pool–Frenkel thermoelectric modulation of exciton photoluminescence in GaSe crystals” Journal of Luminescence, 131(7), (2011), 1376-9.https://doi.org/10.1016/j.jlumin.2011.03.037
  • G.M. Mamedov, M. Karabulut, H.Ertap, A. O.Kodolbas, Ö. Öktü, A. Bacıoğlu, “Exciton photoluminescence, photoconductivity and absorption in GaSe0.9Te0.1 alloy crystals”, Journal of Luminescence, 129, (2009), 226-30, https://doi.org/10.1016/j.jlumin.2008.09.015
  • A.Bacıoğlu, A.O.Kodolbaş, Ö.Öktü, “Temperature dependent photoluminescence of PECVD a-SiOx:H (x<2)”, Journal of Luminescence 130, (2010), 1730-7. https://doi.org/10.1016/j.jlumin.2010.04.001
  • A.Bacıoğlu, A.O.Kodolbaş, Ö.Öktü, “ Deposition of highly photoconductive wide band gap a-SiOx:H thin films at a high temperature without H2 dilution” Solar Energy Materials and Solar Cells, 89 (1), (2005), 49-59, https://doi.org/10.1016/j.solmat.2005.01.001
  • A.O.Kodolbaş, B.Çomak, A.Bacıoğlu, Ö.Öktü, "Lateral photovoltage measurements in hydrogenated amorphous silicon and silicon-oxygen thin films ", Journal of Non-Crystalline Solids, 351-5, (2005), 426-31, https://doi.org/10.1016/j.jnoncrysol.2005.01.005
  • A.Bacıoğlu, A.O.Kodolbaş, Ö.Öktü, " Optimization of the RF power density to obtain good quality hydrogenated amorphous silicon films in a home made glow discharge system", Optical Materials, 25, (2004), 335-9, https://doi.org/10.1016/j.optmat.2003.08.004

Links

https://avesis.hacettepe.edu.tr/bacioglu
https://yunus.hacettepe.edu.tr/~bacioglu/index.html