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Sensors 2012, 12(10), 13899-13906; doi:10.3390/s121013899

Organic Electroluminescent Sensor for Pressure Measurement

1,* , 1
1 Department of Micro-Nano Systems Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 4648603, Japan 2 Department of Mechanical Engineering, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-Cho, Toyota 4700392, Japan
* Author to whom correspondence should be addressed.
Received: 24 August 2012 / Revised: 27 September 2012 / Accepted: 9 October 2012 / Published: 16 October 2012
(This article belongs to the Section Chemical Sensors)
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We have proposed a novel concept of a pressure sensor called electroluminescent pressure sensor (ELPS) based on oxygen quenching of electroluminescence. The sensor was fabricated as an organic light-emitting device (OLED) with phosphorescent dyes whose phosphorescence can be quenched by oxygenmolecules, and with a polymer electrode which permeates oxygen molecules. The sensor was a single-layer OLED with Platinum (II) octaethylporphine (PtOEP) doped into poly(vinylcarbazole) (PVK) as an oxygen sensitive emissive layer and poly(3,4-ethylenedioxythiophene) mixed with poly(styrenesulfonate) (PEDOT:PSS) as an oxygen permeating polymer anode. The pressure sensitivity of the fabricated ELPS sample was equivalent to that of the sensor excited by an illumination light source. Moreover, the pressure sensitivity of the sensor is equivalent to that of conventional pressure-sensitive paint (PSP), which is an optical pressure sensor based on photoluminescence.
Keywords: optical sensor; pressure-sensitive paint; oxygen quenching; oxygen sensor; organic electroluminescence optical sensor; pressure-sensitive paint; oxygen quenching; oxygen sensor; organic electroluminescence
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Matsuda, Y.; Ueno, K.; Yamaguchi, H.; Egami, Y.; Niimi, T. Organic Electroluminescent Sensor for Pressure Measurement. Sensors 2012, 12, 13899-13906.

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