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

Timothy P. Osedach, Antonio Iacchetti, Richard R. Lunt, Trisha L. Andrew, Patrick R. Brown, Gleb M. Akselrod, Vladimir Bulović

Research output: Contribution to journalArticle

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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 3dB) of a fully optimized device are measured to be (4.3 ± 0.1) × 10 11 cm Hz 1/2 W -1 and 92 kHz, respectively.

LanguageEnglish (US)
Article number113303
JournalApplied Physics Letters
Volume101
Issue number11
DOIs
StatePublished - Sep 10 2012

Profile

metal oxides
photometers
dyes
oxides
thin films
spacers
thick films
quantum efficiency
absorptivity
anodes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Osedach, T. P., Iacchetti, A., Lunt, R. R., Andrew, T. L., Brown, P. R., Akselrod, G. M., & Bulović, V. (2012). Near-infrared photodetector consisting of J-aggregating cyanine dye and metal oxide thin films. Applied Physics Letters, 101(11), [113303]. DOI: 10.1063/1.4752434

Near-infrared photodetector consisting of J-aggregating cyanine dye and metal oxide thin films. / Osedach, Timothy P.; Iacchetti, Antonio; Lunt, Richard R.; Andrew, Trisha L.; Brown, Patrick R.; Akselrod, Gleb M.; Bulović, Vladimir.

In: Applied Physics Letters, Vol. 101, No. 11, 113303, 10.09.2012.

Research output: Contribution to journalArticle

Osedach, TP, Iacchetti, A, Lunt, RR, Andrew, TL, Brown, PR, Akselrod, GM & Bulović, V 2012, 'Near-infrared photodetector consisting of J-aggregating cyanine dye and metal oxide thin films' Applied Physics Letters, vol 101, no. 11, 113303. DOI: 10.1063/1.4752434
Osedach TP, Iacchetti A, Lunt RR, Andrew TL, Brown PR, Akselrod GM et al. Near-infrared photodetector consisting of J-aggregating cyanine dye and metal oxide thin films. Applied Physics Letters. 2012 Sep 10;101(11). 113303. Available from, DOI: 10.1063/1.4752434
Osedach, Timothy P. ; Iacchetti, Antonio ; Lunt, Richard R. ; Andrew, Trisha L. ; Brown, Patrick R. ; Akselrod, Gleb M. ; Bulović, Vladimir. / Near-infrared photodetector consisting of J-aggregating cyanine dye and metal oxide thin films. In: Applied Physics Letters. 2012 ; Vol. 101, No. 11.
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