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Transport properties in lead phthalocyanine thin films for use in FET structures

SADAT-SHAFAI, Torfeh and Gould, R.D. (1990) Transport properties in lead phthalocyanine thin films for use in FET structures. International Journal of Electronics, 69 (1). pp. 3-9. ISSN 00207217

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Abstract or description

DC electrical measurements have been made for a wide lead phthalocyanine (PbPc) thickness range (d ˜ 0·5-5·0µm). Measurements of capacitance as a function of inverse thickness revealed a low frequency relative permittivity (∈r ˜ 3·9), slightly higher than in copper phthalocyanine. At low voltages Ohm's law was followed, with a thermally-activated hole concentration of (1·1-2·1)×1016 m-3. Above a threshold voltage Vt, a power-law dependence of current density on applied voltage was observed, indicating space-charge-limited conductivity, Vt varied in the range 0·4-20V and was approximately proportional to d2, providing further evidence for this effect. The results were accounted for in terms of an exponential distribution of traps of total concentration 2.8×1025 m-3 within the bandgap, as observed in similar organic materials. © 1990 Taylor & Francis Ltd.

Item Type: Article
Additional Information: cited By 29
Faculty: School of Creative Arts and Engineering > Engineering
Depositing User: Library STORE team
Date Deposited: 09 May 2018 15:40
Last Modified: 24 Feb 2023 13:51

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