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Near-infrared photodetector consisting of J-aggregating cyanine dye and metal oxide thin films

Author(s)
Osedach, Timothy Paul; Iacchetti, Antonio; Lunt, Richard R.; Andrew, Trisha Lionel; Brown, Patrick Richard; Akselrod, Gleb Markovitch; Bulovic, Vladimir; ... Show more Show less
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Abstract
We demonstrate a near-infrared photodetector that consists of a thin film of the J-aggregating cyanine dye, U3, and transparent metal-oxide charge transport layers. The high absorption coefficient of the U3 film, combined with the use of a reflective anode and optical spacer layer, results in a zero-bias external quantum efficiency of 16.1 ± 0.1% (λ = 756 nm) for a device containing an 8.1 ± 0.3 nm-thick U3 film. The specific detectivity (D*) and response speed (f [subscript 3 dB]) of a fully optimized device are measured to be (4.3 ± 0.1) × 10[superscript 11] cm Hz[superscript 1/2] W[superscript −1] and 92 kHz, respectively.
Date issued
2012-09
URI
http://hdl.handle.net/1721.1/86120
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. School of Engineering
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Osedach, Timothy P., Antonio Iacchetti, Richard R. Lunt, Trisha L. Andrew, Patrick R. Brown, Gleb M. Akselrod, and Vladimir Bulović. “Near-Infrared Photodetector Consisting of J-Aggregating Cyanine Dye and Metal Oxide Thin Films.” Appl. Phys. Lett. 101, no. 11 (2012): 113303. © 2012 American Institute of Physics
Version: Final published version
ISSN
00036951
1077-3118

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