Near-infrared photodetector consisting of J-aggregating cyanine dye and metal oxide thin films
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...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Institute of Physics (AIP)
2014
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| Online Access: | http://hdl.handle.net/1721.1/86120 https://orcid.org/0000-0002-0960-2580 https://orcid.org/0000-0001-7388-2815 https://orcid.org/0000-0001-5908-3064 |
| Summary: | 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. |
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