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High‐electric field conduction phenomena in poly‐2‐chloro‐p‐xylylene/poly‐p‐xylylene composite thin films
Author(s) -
Mori Tatsuo,
Mizutani Teruyoshi
Publication year - 1991
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391110702
Subject(s) - xylylene , thin film , materials science , anode , composite number , electric field , space charge , analytical chemistry (journal) , composite material , polymer chemistry , nanotechnology , chemistry , electrode , electron , organic chemistry , physics , quantum mechanics
The high‐field currents in poly‐ p ‐chloro‐xylylene (PCPX) thin films are due to hole injection from anode metal and collision ionization. PPX thin films showed the negative temperature dependence of high‐field currents. Since the chlorine atoms in PCPX thin films act as carrier scattering centers, high‐field currents in PCPX thin films are suppressed in the low‐temperature region. This paper discusses the high‐field currents of PCPX/PPX composite thin films; these films are PCPX thin films ( d < 150 nm) deposited on PPX thin films ( d > 200 nm). They were strongly suppressed at room temperature, but not at low temperature. Therefore, PCPX/PPX composite thin films showed a remarkable negative temperature dependence of high‐field currents. High‐field currents were suppressed more in PCPX (60 nm)/PPX (230 nm) composite thin film than in PCPX (130 nm)/PPX (230 nm). This can be explained by the suppression of the hole injection from anode by homo space charge at the interface between PCPX/PPX.