An LED Platform for Micropower Gas Sensors

Proceedings

Fabrega, Cristian¹  Casals, Olga²  Markiewicz, Nicolai³  Wasisto, Hutomo Suryo⁴ 

[1] Author to whom correspondence should be addressed.;IHT-LENA, Technische Universität Braunschweig, D-38106 Braunschweig, Germany;MIND-IN2UB, Department of Electronic and Biomedical Engineering, Universitat de Barcelona, E-08028 Barcelona, Spain;Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018

关键词: gas sensor;    conductometric;    metal oxide;    photoactivated;    LED;    In:GaN;    low power;   

DOI  :  10.3390/proceedings2130971

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

We developed an integrated platform to build up conductometric sensors with controlled illumination. Our device contains a miniaturized indium gallium nitride (InGaN) LED as a light source, and a set of interdigitated electrodes (IDEs) in close contact with the LED. The sensor material is later deposited on top of the IDE, to monitor its resistance. In this configuration, all the light emitted by the LED is collected by the sensor material, leading to a very efficient photoexcitation. We demonstrate the effectiveness of the approach building a photoactivated gas sensor based on ZnO operating with as little as 100 μW.

【 授权许可】

CC BY