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Wyszukujesz frazę "Płaczek, E." wg kryterium: Autor

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Capacitance-Voltage Studies of Ti/p-ZnTe Schottky Barrier Structures Containing CdTe Quantum Dots
    Autorzy:
    Placzek-Popko, E.
    Szatkowski, J.
    Zielony, E.
    Gumienny, Z.
    Dobaczewski, L.
    Karczewski, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2048047.pdf
    Data publikacji:
    2011-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.61.Ga
    73.21.La
    73.20.Hb
    Opis:
    In this paper the electronic states of self-organized CdTe quantum dots embedded in ZnTe matrix are studied by means of capacitance-voltage (C-V) characteristics within the temperature range of 180-300 K. A reference diode of the same layer structure but without quantum dots is studied also for comparison. The C-V characteristics measured for the reference diode exhibit bulk behaviour in contrast to the quantum dots sample for which a characteristic step corresponding to discharging of quantum dots is clearly visible within broad range of temperatures. A quasistatic model based on the self-consistent solution of the Poisson equations is used to simulate the capacitance. By comparison the calculated C-V curve with experimental curve the apparent thermal activation energy for hole emission from the quantum dots to the ZnTe matrix is found to be equal to (0.12 ± 0.03) eV.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 5; 621-623
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Deep Levels in GaN p-n Junctions Studied by Deep Level Transient Spectroscopy and Laplace Transform Deep-Level Spectroscopy
    Autorzy:
    Dyba, P.
    Placzek-Popko, E.
    Zielony, E.
    Gumienny, Z.
    Grzanka, S.
    Czernecki, R.
    Suski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2048090.pdf
    Data publikacji:
    2011-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.61.Ey
    71.55.Eq
    73.40.Kp
    Opis:
    p$\text{}^{+}$-n GaN diodes were studied by means of conventional deep level transient spectroscopy and Laplace transform deep-level spectroscopy methods within the temperature range of 77-350 K. Deep level transient signal spectra revealed the presence of a majority and minority trap of indistinguishable signatures. The Laplace transform deep-level spectroscopy technique due to its superior resolution allows us to unambiguously identify and characterize the traps. The apparent activation energy and capture cross-section for the majority trap were found to be equal to 0.63 eV and 2 × 10$\text{}^{-16}$ cm$\text{}^{2}$ and for the minority trap 0.66 eV and 1.6 × 10$\text{}^{-15}$ cm$\text{}^{2}$. It has been confirmed that the Laplace transform deep-level spectroscopy technique is a powerful tool in characterization of the traps of close signatures.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 5; 669-671
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Deep Levels Induced by CdTe/ZnTe Quantum Dots
    Autorzy:
    Zielony, E.
    Placzek-Popko, E.
    Roznicka, A.
    Gumienny, Z.
    Szatkowski, J.
    Dyba, P.
    Pacuski, W.
    Kruse, C.
    Hommel, D.
    Guziewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2048061.pdf
    Data publikacji:
    2011-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.61.Ga
    73.21.La
    73.20.Hb
    Opis:
    The electrical properties of the CdTe/ZnTe quantum dot system have been analyzed to identify deep-level defects related with the presence of quantum dots. The capacitance-voltage (C-V) and deep level transient spectroscopy measurements were used to investigate the samples. A reference ZnTe sample (without dots) was also studied for comparison. Both samples were grown by molecular beam epitaxy technique on the n-type GaAs substrate. The quantum dots were formed by a Zn-induced reorganization of a thin CdTe layer. The presence of quantum dot formation was confirmed by micro-photoluminescence measurements. The deep level transient spectra for both samples are complex. In order to characterize individual contributions to the deep level transient spectra the latter have been simulated by separated Gaussian components [1]. The results of the deep level transient spectroscopy measurements yield the conclusion that the same defects are present in both materials but there is an increased concentration of the defects in the quantum dot structures. No deep level associated directly with the quantum dot confinement has been identified.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 5; 630-632
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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