Imperial College London


Faculty of Natural SciencesDepartment of Physics

Visiting Professor



+44 (0)20 7594 6669thomas.anthopoulos Website




Mrs Carolyn Dale +44 (0)20 7594 7579




1111Blackett LaboratorySouth Kensington Campus






BibTex format

author = {Anthopoulos, TD and Shafai, TS},
doi = {10.1002/1521-396X(200010)181:2<569::AID-PSSA569>3.0.CO;2-Y},
journal = {Physica Status Solidi (A) Applied Research},
pages = {569--574},
title = {SCLC measurements in nickel phthalocyanine thin films},
url = {<569::AID-PSSA569>3.0.CO;2-Y},
volume = {181},
year = {2000}

RIS format (EndNote, RefMan)

AB - Sandwich structures of Au/NiPc/Au were fabricated by sequential vacuum thermal sublimation onto borosilicate glass substrates. dc electrical measurements were performed for several NiPc thin films of different thickness in the range (d = 0.25-1.09 μm). The relative permittivity was measured at a low frequency of 100 Hz, yielding a value of εr = 2.74. This value is considerably lower in comparison with previously published data for various phthalocyanine materials. Current density-voltage characteristics at room temperature reveal an Ohmic conduction in the lower voltage range, followed by SCLC in the higher range, where the latter was found to be controlled by an exponential trap distribution. The plot of current density versus thickness provides further evidence of this effect. The results are analyzed in terms of exponential trap distribution yielding the following values: The temperature parameter characterizing the exponential trap distribution Tt = 1165 K, the concentration of thermally generated holes p0 = 1.40 × 1016 m-3, trap concentration per unit energy range P0 = 4.71 × 1043 J-1 m-3 and total concentration of traps Nt(e) = 7.57 × 1023 m-3.
AU - Anthopoulos,TD
AU - Shafai,TS
DO - 10.1002/1521-396X(200010)181:2<569::AID-PSSA569>3.0.CO;2-Y
EP - 574
PY - 2000///
SN - 0031-8965
SP - 569
TI - SCLC measurements in nickel phthalocyanine thin films
T2 - Physica Status Solidi (A) Applied Research
UR -<569::AID-PSSA569>3.0.CO;2-Y
VL - 181
ER -