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A near infrared light emitting electrochemical cell with a 2.3 V turn-on voltage. | LitMetric

A near infrared light emitting electrochemical cell with a 2.3 V turn-on voltage.

Sci Rep

Madrid Institute for Advanced Studies in Nanoscience, IMDEA Nanociencia, Calle Faraday 9, Ciudad Universitaria de Cantoblanco, 28049, Madrid, Spain.

Published: January 2019

AI Article Synopsis

Article Abstract

We report on an organic electroluminescent device with simplified geometry and emission in the red to near infrared (NIR) spectral region which, has the lowest turn-on voltage value, 2.3 V, among light emitting electrochemical cells (LEECs). We have synthesized and characterized three novel ruthenium π-extended phenanthroimidazoles which differ on their N^N ligands. The use of dimethyl electron donating groups along with the π-extended phenanthroimidazole moiety promotes ambipolar transport thereby avoiding the use of additional charge transport layers. Furthermore, a facile cathode deposition method based on transfer of a molten alloy (Ga:In) on top of the active layer is deployed, thus avoiding high vacuum thermal deposition which adds versatile assets to our approach. We combine ambipolar charge transport organic complex design and a simple ambient cathode deposition to achieve a potentially cost effective red to NIR emitting device with outstanding performance, opening new avenues towards the development of simplified light emitting sources through device optimization.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6338728PMC
http://dx.doi.org/10.1038/s41598-018-36420-1DOI Listing

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