The electrical characteristics of thermally evaporated Chloroindium
phthalocyanine thin films (ClInPc) are studied. A number of parameters are
evaluated on the basis of the theory of space-charge-limited conduction.
ClInPc thin films are extremely stable, in terms of both resistance to
chemical attack and thermally, no hysteretic was observed after temperature
cycling between room temperature and 500 K. DC current-voltage and
current-temperature characteristics were obtained for ClInPc in vacuum and
on exposure to dry air (20% O2) in both the dark and under
illumination with visible light. The conductivity data were analysed in the
framework of band theory to elucidate information about the activation
energy Eac, forbidden band gap $(E_c-E_v)$
, domain or acceptor energy levels ($E_e, E_h$
). In the present work we also examine
the response of ClInPc to O2 and NO2 at different temperatures.