Provider: Ingenta Connect
Database: Ingenta Connect
Content: application/x-research-info-systems
TY - ABST
AU - Samanta, Soumen
AU - Singh, Ajay
AU - Debnath, A. K.
AU - Aswal, D. K.
AU - Gupta, S. K.
AU - Yakhmi, J. V.
TI - Temperature Dependent Current–Voltage Characteristics of Iron-Phthalocyanine Thin Films
JO - Journal of Nanoscience and Nanotechnology
PY - 2009-09-01T00:00:00///
VL - 9
IS - 9
SP - 5262
EP - 5267
KW - IRON PHTHALOCYANINE
KW - HYSTERESIS
KW - SPACE CHARGE LIMITED CONDUCTION
N2 - The current–voltage (I–V) characteristics of the crystalline α-phase iron phthalocyanine (FePc) thin films grown by molecular beam epitaxy have been investigated by using a planar geometry in which the metal electrodes are separated by 15 μm.
By carrying out the room temperature I–V measurements on vacuum annealed (200 °C for 30 min under 10−6 torr) FePc thin films under vacuum and after exposing them to the air, we demonstrate that the hysteresis in FePc films is intimately related to the
filling and de-filling of surface traps created by chemisorbed oxygen. The presence of chemisorbed oxygen has been confirmed by the X-ray photoelectron spectroscopy. Room temperature I–V characteristics of air exposed films showed ohmic conduction in the lower voltage range
and space-charge-limited-conductivity (SCLC) in the relatively high voltage. Temperature dependent measurements show that the hysteresis disappears at 250 K and the surface traps are distributed in energy about 0.22 eV deep.
UR - https://www.ingentaconnect.com/content/asp/jnn/2009/00000009/00000009/art00024
M3 - doi:10.1166/jnn.2009.1170
UR - https://doi.org/10.1166/jnn.2009.1170
ER -