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Thermally Stimulated Currents without Optical Excitation. Application to Copper Phtalocyanine
Author(s) -
Devaux P.,
Schott M.
Publication year - 1967
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19670200129
Subject(s) - excitation , copper , current (fluid) , ohmic contact , electrode , materials science , optoelectronics , atomic physics , chemistry , physics , metallurgy , quantum mechanics , thermodynamics
Thermally stimulated current peaks can occur int he absence of previous optical excitation, if at least one of the electrodes on the sample is non‐ohmic. A variety of cases is considered. Most of these cases enable deep‐lying centres which give only very small current peaks to be studied. Their experimental characteristics are presented. They are particularly useful in the case of organic crystals, where optical filling of traps at low temperatures is inefficient and lengthy. This method, applied to copper phtalocyanine, enables centres lying at depths of 0.41 and 0.65 eV, which can not be observed using optical excitation, to be studied.