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Proceedings Paper

Advances in OLED/OPD-based sensors and spectrometer-on-a-chip (Conference Presentation)
Author(s): Joseph Shinar; Rajiv Kaudal; Eeshita Manna; Fadzai Fungura; Ruth Shinar

Paper Abstract

We describe ongoing advances toward achieving all-organic optical sensors and a spectrometer on a chip. Two-dimensional combinatorial arrays of microcavity OLEDs (μcOLEDs) with systematically varying optical cavity lengths are fabricated on a single chip by changing the thickness of different organic and/or spacer layers sandwiched between two metal electrodes (one very thin) that form the cavity. The broad spectral range is achieved by utilizing materials that result in white OLEDs (WOLEDs) when fabricated on a standard ITO substrate. The tunable and narrower emissions from the μcOLEDs serve as excitation sources in luminescent sensors and in monitoring light absorption. For each wavelength, the light from the μcOLED is partially absorbed by a sample under study and the light emitted by an electronically excited sample, or the transmitted light is detected by a photodetector (PD). To obtain a compact monitor, an organic PD (OPD) or a perovskite-based PD is integrated with the μcOLED array. We show the potential of encompassing a broader wavelength range by using WOLED materials to fabricate the μcOLEDs. The utility of the all-organic analytical devices is demonstrated by monitoring oxygen, and bioanalytes based on oxygen detection, as well as the absorption spectra of dyes.

Paper Details

Date Published: 7 November 2016
PDF: 1 pages
Proc. SPIE 9944, Organic Sensors and Bioelectronics IX, 99440F (7 November 2016); doi: 10.1117/12.2238656
Show Author Affiliations
Joseph Shinar, Iowa State Univ. of Science and Technology (United States)
Rajiv Kaudal, Iowa State Univ. of Science and Technology (United States)
Eeshita Manna, Iowa State Univ. of Science and Technology (United States)
Fadzai Fungura, Iowa State Univ. of Science and Technology (United States)
Ruth Shinar, Iowa State Univ. of Science and Technology (United States)

Published in SPIE Proceedings Vol. 9944:
Organic Sensors and Bioelectronics IX
Ioannis Kymissis; Ruth Shinar; Luisa Torsi, Editor(s)

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