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Organic photodetector arrays with indium tin oxide electrodes patterned using directly transferred metal masks

Appl. Phys. Lett. 94, 043313 (2009); doi:10.1063/1.3072612

Published 29 January 2009

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Xin Xu,1,2 Momchil Mihnev,3 Andre Taylor,4 and Stephen R. Forrest2,3
1Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA
2Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
3Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109, USA
4Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA
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/C60) 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 1.25×1011  cm Hz1/2 W−1. ©2009 American Institute of Physics
History: Received 26 October 2008; accepted 22 December 2008; published 29 January 2009
Permalink: http://link.aip.org/link/?APPLAB/94/043313/1
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KEYWORDS and PACS

Keywords
PACS
  • 85.60.Gz
    Photodetectors
  • 85.40.Hp
    Lithography, masks and pattern transfer (microelectronics)
  • 42.79.Pw
    Imaging detectors and sensors
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
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REFERENCES (14)
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