Capacitance enhancement in the accumulation region of C - V characteristics in metal-insulator-semiconductor capacitors consisting of pentacene and poly(4-vinylphenol)

We report a peculiar enhancement in the accumulation capacitance C acc in the capacitance-voltage ( C - V ) characteristics of metal-insulator-semiconductor capacitors consisting of poly(4-vinylphenol) (PVP) and pentacene. C acc at low frequency C - V was five times larger than the PVP dielectric ca...

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Bibliographic Details
Published in:Applied physics letters 2009-05, Vol.94 (18), p.183302-183302-3
Main Authors: Jeong, Seung Hyeon, Song, Chung Kun, Yi, Mihye
Format: Article
Language:English
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Summary:We report a peculiar enhancement in the accumulation capacitance C acc in the capacitance-voltage ( C - V ) characteristics of metal-insulator-semiconductor capacitors consisting of poly(4-vinylphenol) (PVP) and pentacene. C acc at low frequency C - V was five times larger than the PVP dielectric capacitance C PVP . C acc decreased as the frequency was increased and returned to the level of C PVP at 1 MHz. The origin of the capacitance enhancement appears to be associated with water molecules adsorbed into the PVP dielectric film when considering the correlation with the concentration of PVP polymer in which OH phenol is known to absorb water molecules.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3130084