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Perovskite based photosensor for electrochemical studies
Author(s): Arash Takshi; Jon Bebeau; Fatemeh Rahimi
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Paper Abstract

Photosensors are used for the detection of analytes in microfluidic devices. In order to detect materials with low concentrations, a sensor with high sensitivity is required. Perovskite has been studied extensively as a photoactive material in solar cells due to its wide absorption spectrum and low recombination rate of charges which also make it a suitable candidate for photosensors. In this work, the photoconductivity of the material in a thin-film resistor is studied. The resistance of the device is measured at different wavelengths and intensities. A significant change of the resistance is observed upon illumination indicating the adequacy of the device to serve as a photosensor. However, in this case, the perovskite layer must be protected with an insulating thin film to avoid undesired reactions and contacts. The perovskite film was also tested as an electrochemical photosensor. The current-voltage characteristics of the device showed a diode rectifying response both in dark and under illumination. In this case, the photo response of the device established promising results for applications in photosensors with a relatively high stability in a liquid media.

Paper Details

Date Published: 27 September 2016
PDF: 7 pages
Proc. SPIE 9944, Organic Sensors and Bioelectronics IX, 99440R (27 September 2016); doi: 10.1117/12.2237778
Show Author Affiliations
Arash Takshi, Univ. of South Florida (United States)
Jon Bebeau, Univ. of South Florida (United States)
Fatemeh Rahimi, Univ. of South Florida (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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