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Light-modulating pressure sensor with integrated flexible organic light-emitting diode

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<mark>Journal publication date</mark>1/05/2014
<mark>Journal</mark>Applied Optics
Issue number13
Volume53
Number of pages7
Pages (from-to)2766-2772
Publication StatusPublished
Early online date27/03/14
<mark>Original language</mark>English

Abstract

Organic light-emitting diodes (OLEDs) are used almost exclusively for display purposes. Even when implemented as a sensing component, it is rarely in a manner that exploits the possible compliance of the OLED. Here, it is shown that OLEDs can be integrated into compliant mechanical micro devices making a new range of applications possible. A light-modulating pressure sensor is considered, whereby the OLED is integrated with a silicon membrane. It is shown that such devices have potential and advantages over current measurement techniques. An analytical model has been developed that calculates the response of the device. Ray tracing numerical simulations verify the theory and show that the design can be optimised to maximise the resolution of the sensor.