Artykuły (WFTIiMS)
Stały URI dla kolekcjihttp://hdl.handle.net/11652/174
Przeglądaj
23 wyniki
collection.search.results.head
Pozycja Elimination of the impact of rc constant on transient photocurrents measured in organic layers.(Wydawnictwo Politechniki Łódzkiej, 2016) Kania, Sylwester; Kuliński, JanuszWe present a calculation method for elimination of the effect of the RC constant of the measuring circuit in the time-of-flight (TOF) measurements where a pulse generation of the photocurrent in a thin layer of low-molecular organic material is exploited. Presented method allows to eliminate the influence of the component of displacement current related to dielectric losses and obtaining the actual conduction current time dependence. The method was tested on the thin layers of 1,5-dihydroxynaphthalene.Pozycja The effect of symmetry of a molecule electronic density on the dipole moment of unit cell and hole conductivity of thin polycrystalline films of anthrone and anthraquinone.(Wydawnictwo Politechniki Łódzkiej, 2016) Kania, Sylwester; Kościelniak-Mucha, Barbara; Kuliński, Janusz; Słoma, Piotr; Wojciechowski, KrzysztofThe electronic structure of anthrone and anthraquinone molecules in the gas state and in the simulated crystal unit cell were calculated with time dependent-density functional theory (TD-DFT) method. The values of dipole moment of single molecule and of single crystal unit cell were also determined with TD-DFT method. The results of TD-DFT were compared with known crystal structures of both compounds [1,2]. For both molecules it was observed improvement of matching the length of corresponding bonds when calculated for the unit cell. Unexpectedly high value of dipole moment was calculated for the single unit cell of anthrone. This fact can be responsible for the nano-dimension properties of anthrone as the carriers mobility or high boiling point.Pozycja Adsorption induced hole transport in thin layers of non-ordered tetracene.(Wydawnictwo Politechniki Łódzkiej, 2015) Kania, Sylwester; Kuliński, JanuszAdditional disorder induced by adsorption processes by the molecule of ambient are responsible for deep modulation of conductivity. Observations confirmed the dominated role of the increase of the free carrier concentration due to the increse the shallow trap concentration, for modulation of the conductivity.Pozycja Spline interpolation for trap spectroscopy analysis for two cyclic hydrocarbons.(Wydawnictwo Politechniki Łódzkiej, 2015) Kania, Sylwester; Kuliński, JanuszCubic spline interpolation gives a tool for obtaining good image of current-voltage characteristics for trap spectroscopy analysis without prior assumption about the trap distribution for 1-acenaphthenol and 9,10-dimethylanthracene.Pozycja Effect of molecule dipolemoment on hole conductivity of polycrystalline anthrone and anthrachinone layers.(Wydawnictwo Politechniki Łódzkiej, 2015) Kania, Sylwester; Kościelniak-Mucha, Barbara; Kulinski, Janusz; Słoma, PiotrComplex analyzes were made using methods of molecular quantum mechanics to investigate the effect of the dipole moment of the molecule carrier drift mobility in polycrystalline layers composed of anthrone and anthrachinone molecules. The differences in the measured mobility values seems to be originated in the variations of the geometry of the frontier orbitals rather than the differences inherent in the crystal arrangement of these molecules, which after all, for both are nearly identical.Pozycja Correlated networks in the adsorptionenhanced currents(Lodz University of Technology Press, 2014) Kania, Sylwester; Kuliński, JanuszInjection of carriers into thin layers of acenes due to adsorption of ethanol activator molecules is considered as a electron transfer reaction between two phases. Complexity of the processes may be diminished with applying electron transfer theory in the meaning of Marcus.Pozycja Bipolar transport of charge carriers in thin films of 9,10-dimethylanthracene and 1-acenaphthenol.(Lodz University of Technology Press, 2014) Kania, Sylwester; Kuliński, Janusz; Marciniak, Bernard; Różycka-Sokołowska, EwaThe current-voltage (I-U) characteristics we have been measured for thin films of 1-acenaphthenol and 9,10-dimethylanthracene prepared from their commercially available materials as products with purity >_ 10-3 mass %. Using the method of differential processing of the characteristics, charge transport mechanism in these films was assessed.Pozycja Bipolar transport of charge carriers in thin films of 9,10-dimethylanthracene and 1-acenaphthenol.(Wydawnictwo Politechniki Łódzkiej, 2014) Kania, Sylwester; Kuliński, Janusz; Marciniak, Bernard; Różycka-Sokołowska, EwaThe current-voltage (I-U) characteristics we have been measured for thin films of 1-acenaphthenol and 9,10-dimethylanthracene prepared from their commercially available materials as products with purity ≥ 10-3mass %. Using the method of differential processing of the characteristics, charge transport mechanism in these films was assessed.Pozycja Correlated networks in the adsorption enhanced currents.(Wydawnictwo Politechniki Łódzkiej, 2014) Kania, Sylwester; Kuliński, JanuszInjection of carriers into thin layers of acenes due to adsorption of ethanol activator molecules is considered as a electron transfer reaction between two phases. Complexity of the processes may be diminished with applying electron transfer theory in the meaning of Marcus.Pozycja Hole drift mobility in anthrone and anthrachinone layers with different structure.(Wydawnictwo Politechniki Łódzkiej, 2014) Kania, SylwesterThe hole drift mobilities were measured with use of time of flight method (TOF) for layers of antrachinone and anthrone with different structural orders. The differences in the values of mobility for anthrone and anthrachinone are explained as an effect of different permanent dipole moment for these molecules.
- «
- 1 (current)
- 2
- 3
- »