Solution-processed finger-type organic proximity sensor with high displacement resolution

Jung Sung Liao, Kuan Hsun Wang, Hsiao-Wen Zan, Hsin-Fei Meng, Ping Hung Yeh, Chuang Chuang Tsai, Wilfried Hortschitz, Harald Steiner, Thilo Sauter

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Proximity sensors are interesting devices for applications like smart homes or human-machine interfaces. This work investigates a cheap and compact short-range proximity sensor based on an organic photo detector combined with a commercial LED. Low-cost solution-processed organic materials are used, and low process temperatures at 140 °C also facilitate future integration on, e.g., plastic substrates. In particular, to avoid damage of the organic layer during the patterning process, a new organic photo detector with a semitransparent organic active layer and a transparent silver nanowire top electrode was designed. The proposed sensor can be realized by using only one shadow mask to pattern the opaque bottom electrode layer. The opaque finger-type bottom electrode not only partly shields the light emitted from below the device, but also defines the active regions with vertical electric field to generate and collect photo current. In the experiments conducted in this paper, the maximum detection distance was found to be 2 cm, whereas the lower end of the measurement range was 0.2 cm.

Original languageEnglish
Title of host publicationI2MTC 2016 - 2016 IEEE International Instrumentation and Measurement Technology Conference
Subtitle of host publicationMeasuring the Pulse of Industries, Nature and Humans, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467392204
DOIs
StatePublished - 22 Jul 2016
Event2016 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2016 - Taipei, Taiwan
Duration: 23 May 201626 May 2016

Publication series

NameConference Record - IEEE Instrumentation and Measurement Technology Conference
Volume2016-July
ISSN (Print)1091-5281

Conference

Conference2016 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2016
CountryTaiwan
CityTaipei
Period23/05/1626/05/16

Keywords

  • finger-type photodetector
  • OPD
  • proximity sensor

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  • Cite this

    Liao, J. S., Wang, K. H., Zan, H-W., Meng, H-F., Yeh, P. H., Tsai, C. C., Hortschitz, W., Steiner, H., & Sauter, T. (2016). Solution-processed finger-type organic proximity sensor with high displacement resolution. In I2MTC 2016 - 2016 IEEE International Instrumentation and Measurement Technology Conference: Measuring the Pulse of Industries, Nature and Humans, Proceedings [7520589] (Conference Record - IEEE Instrumentation and Measurement Technology Conference; Vol. 2016-July). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/I2MTC.2016.7520589