UDC 535.215, 541.67 Charge Carriers Transport Mechanism in a-TNF Thin Layers I. M. Kashirskiy Department of General Physics Peoples’ Friendship University of Russia Mikluho-Macklaya str., 6, Moscow, 117198, Russia The development of modern photocopying machines, the search for cheap, efficient and reliable solar cells, the search for new conducting materials and molecular storage systems has motivated experimental and theoretical work on organic materials such as molecular crystals, polymers and low-dimensional organic compounds. <...> The organic electron acceptor 2,4,7-trinitro-fluorenone is used as sensitizer of photosensitive polymers, to extend the spectral range of their photosensitivity through the formation of charge-transfer complexes. <...> Also, the thin films of TNF, depending on conditions of samples preparation, can be obtained in amorphous, polycrystalline and crystalline forms and, therefore, this material can be useful to investigate the effect of structure of organic materials on their electrical and photoelectrical properties. <...> The effect of trapping centres on the conductivity of amorphous 2,4,7-Trinitro-Nine-Fluo0.29 ± 0.04 eV with a dispersion parameter σ = 0.11 ± 0.02 eV. The true activation energy at room temperature is Ea = 0.45 ± 0.03 eV. The zero-field extrapolated activation energy is Eao = 0.65 ± 0.02 eV. It was suggested that the transport of charge carriers in a-TNF is controlled by traps. <...> Concentration of traps and drift mobility of electrons were renone (a-TNF) is investigated by Space Charge Limited Current (SCLC), Thermally Stimulated Currents (TSC, TSD) and Transient photoconductivity methods. <...> It is found that electron traps in a-TNF have a smoothly varying distribution centered at about Et = evaluated. <...> Key words and phrases: amorphous solids, electronic transport, charge traps, transient photoconductivity, space charge, thermally stimulated current, activation energy. 1. <...> Introduction The amorphous organic electron acceptor 2,4,7-Trinitro-9-Fluorenone (a-TNF) is an aromatic solid whose electronic property enables it to be a candidate in a wide areas of application; as a photoconductor [1], as a transport layer for electrons in multilayer photoreceivers [2, 3], as sensitizer of polymers which form charge-transfer complexes with it [4, 5]. <...> The reported data provide important information on electronic properties of a-TNF layers but it is still <...>