Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3072612
Keywords
carbon compounds; focal planes; fullerenes; indium compounds; masks; organic semiconductors; photodetectors; tin compounds
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Funding
- Defense Advanced Research Projects Agency
- Air Force Office of Scientific Research
- National Science Foundation
- Universal Display Corporation
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We demonstrate the patterning of indium tin oxide (ITO) electrodes with submicron resolution onto both planar and hemispherical plastic surfaces using a process based on the direct transfer of a metal film etch mask via cold welding. Using this process, we fabricate an organic (copper phthalocyanine/C-60) photodetector focal plane array on a hemispherical surface in an architecture that mimics the size and form of the human eye. The low absorption of the ITO anodes results in an increase in external quantum efficiency by up to 65% in the visible as compared with that of a previously demonstrated photodetector array with semitransparent Au anodes. The maximum photodetector detectivity is 1.25x10(11) cm Hz(1/2) W-1.
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