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 (IV) 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 IV 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 IV 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 -