Electrical Characteristics of PEDOT:PSS Organic Contacts to HgCdTe |
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| Authors: | PY Emelie E Cagin J Siddiqui JD Phillips C Fulk J Garland S Sivananthan |
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| Affiliation: | (1) Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109-2122, USA;(2) EPIR Technologies, Bolingbrook, IL 60440, USA |
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| Abstract: | The electrical characteristics of organic (3,4-polyethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) contacts to
HgCdTe are studied as a potential alternative to metal/HgCdTe contacts. The use of organic PEDOT:PSS contacts offers the potential
for an improved contact technology for HgCdTe IR detector arrays. In this work, PEDOT:PSS contacts are deposited on n-type and p-type HgCdTe epilayers by spin coating and patterned using a metal mask. Current-voltage (I-V) characteristics are measured
on these contacts, showing nearly ohmic behavior. The temperature dependence of I-V characteristics (T = 40–300 K) shows increased resistance for decreasing temperature, consistent with the temperature dependence of HgCdTe resistivity,
suggesting that the I-V characteristics are primarily dominated by the HgCdTe material. |
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| Keywords: | HgCdTe infrared detectors organic materials electrical contacts (3 4-polyethylenedioxythiophene) (PEDOT) |
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