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A step towards the electrophotonic nose: integrating 1D photonic crystals with organic light‐emitting diodes and photodetectors
Author(s) -
Exner Armin T.,
Pavlichenko Ida,
Baierl Daniela,
Schmidt Morten,
Derondeau Gerald,
Lotsch Bettina V.,
Lugli Paolo,
Scarpa Giuseppe
Publication year - 2014
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201300220
Subject(s) - photodetector , optoelectronics , materials science , spectrometer , oled , photonics , analyte , diode , light emitting diode , photonic crystal , optics , nanotechnology , chemistry , layer (electronics) , physics
An innovative integrated sensing platform for the detection of various chemical analytes via translating the photonic stop‐band shift of a one‐dimensional photonic crystal (PC) into an electrical current change is proposed. The miniaturized sensing platform features an organic light‐emitting diode (OLED) as a light source and an organic photodetector (OPD) as a light sensor and allows for the detection of ethanol vapor concentrations down to ≈ 10 parts per million (ppm) in nitrogen, which corresponds to a stop‐band shift of ≈ 27 pm. The resolution of the proposed platform exceeds the capabilities of most commercial spectrometers and by far the human eye, while, at the same time, such a sensor is less expensive and less power consuming than a spectrometer. The presented setup is generic and can detect optical changes in the transmission of PCs, which can be induced by both vapor adsorption or by a liquid analyte, as demonstrated with a microfluidic setup.