
TY  - JOUR
A1  - Nespurek, S 
A1  - Hart, RHG 
A1  - Bonham, JS 
A1  - Lyons, LE 
T1  - Photoconduction in Metal-Free Phthalocyanine Films
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1985
VL  - 38
IS  - 7
SP  - 1061
EP  - 1077
KW  - 
UR  - https://doi.org/10.1071/CH9851061 
N2  - By using pulsed photoconductivity techniques, transient action spectra have been recorded on vacuum-sublimed a metal-free phthalocyanine thin films in the wavelength range 350-700 nm. The transient photocurrents were determined at fields less than 107 V m-1 by range-limited transport of holes, the &#956;T product of photogenerated holes being c. 2&#215;10-14 m2 V-1. The electron &#956;T product was about 100 times smaller. Carrier generation was a bulk phenomenon. The quantum efficiency was about 1-2% at fields up to 107 V m-1, and it was increased several fold by the presence of a layer of the acceptor pyromellitic dianhydride. Photogeneration in phthalocyanine occurred by an Onsager -type process. When pyromellitic  dianhydride was present, an additional process of carrier generation, not of Onsager type, occurred, possibly associated with an exciton reaction with a charge-transfer complex between &#945; metal-free phthalocyanine and pyromellitic dianhydride . 
ER  -

