The defect state of Yb-doped ZnO nanoparticles using thermoluminescence study

Shallow trapping centers in Yb-doped ZnO nanoparticles were determined using thermoluminescence (TL) measurements applied in the 10-300 K temperature region. Undoped and Yb-doped ZnO nanoparticles were synthesized by sol-gel method. TL glow curve of undoped nano-particles presented three peaks around 56, 108 and 150 K whereas one additional peak around 83 K was observed in the TL curve of Yb-doped ZnO nano-particles. The increase of Yb concentration in the nanoparticles increased the TL intensity of this additional peak. Activation energies of interstitial defect centers were found as 20, 82 and 105 meV while energy of trapping center existing due to Yb-doping was obtained as 72 meV using curve fitting and initial rise methods.


Study on thermoluminescence of TlInS2 layered crystals doped with Pr
Delice, S.; IŞIK, MEHMET; Hasanlı, Nızamı (Elsevier BV, 2018-06-15)
Praseodymium (Pr) doped TlInS2 crystals were studied by means of thermoluminescence (TL) measurements performed below room temperature with various heating rates. Detected TL signal exhibited glow curve consisting in overlapping two TL peaks at temperatures of 35 K (peak A) and 48 K (peak B) for 0.6 K/s heating rate. TL curve was analyzed with curve fitting and initial rise methods. Both of the applied methods resulted in consistent activation energies of 19 and 45 meV. The revealed trap levels were found t...
Extensive deformation behavior of an all-oxide Al2O3-TiO2 nanostructured multilayer ceramic at room temperature
Dericioğlu, Arcan Fehmi; Kagawa, Yutaka (Cambridge University Press (CUP), 2009-11-01)
An all-oxide Al2O3-TiO2 ceramic multilayer composed of 10-100 nm thick alternating layers was fabricated using the reactive magnetron sputtering process. Microindentation tests were carried out on the multilayer ceramic followed by microstructural observations of the cross-sections of the indented sites to characterize the indentation response of the system. During the observations, it was noted that an extensive room temperature "deformation" occurred in the multilayer ceramic material. The material shows ...
JELINEK, R; Özkar, Saim; OZIN, GA (1992-01-01)
23Na double rotation NMR (DOR) provides information on site-specific adsorption of guest molecules within the porous framework of sodium zeolite Y. Anchoring of molybdenum-hexacarbonyl to extraframework Na+ cations in particular locations within the large α-cavities is detected. Changes of the chemical environments of the Na+ cations are observed upon loading trimethylphosphine molecules. Spin-lattice relaxation measurements yield insight on dynamic aspects of the anchoring sodium cations.
Investigation of carrier scattering mechanisms in TIInS2 single crystals by Hall effect measurements
Qasrawi, AF; Hasanlı, Nızamı (Wiley, 2004-05-01)
TlInS2 single crystals are studied through the conductivity and Hall effect measurements in the temperature regions of 100-400 and 170-400 K, respectively. An anomalous behavior of Hall voltage, which changes sign below 315 K, is interpreted through the existence of deep donor impurity levels that behave as acceptor levels when are empty. The hole and electron mobility are limited by the hole- and electron-phonon short range interactions scattering above and below 315 K, respectively. An energy level of 35 ...
Analysis of the Specific Heat in the Supercooled Solid Phase of Liquid Crystals
Kilit, Emel; Yurtseven, Hasan Hamit (Informa UK Limited, 2011-01-01)
The specific heat Cp is analyzed using the experimental data at various temperatures in the solid phase of cholesteryl myristate according to a power-law formula for the rapidly and slowly cooled solid in the stability limit. We also analyze the temperature dependence of the Cp using the experimental data for the supercooled solid phase of p-azoxyanisole in the stability limit and the stability temperatures are determined for both cholesteryl myristate and p-azoxyanisole.
Citation Formats
N. Hasanlı, “The defect state of Yb-doped ZnO nanoparticles using thermoluminescence study,” MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, pp. 29–34, 2019, Accessed: 00, 2020. [Online]. Available: