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The new application of AIEgens realized in photodetectors: reduced work function of transparent electrodes, and much improved performance

Abstract

Highly sensitive organic photodetectors are achieved by tuning the work function of transparent electrodes via two AIEgens with different ionic side chains. With the insertion of AIE molecules, the projected detectivity (D*) is enhanced by over one order of magnitude, accompanying with a fast response speed and a large linear dynamic range. The devices exhibit an ability of actually detecting a weak light with intensity less than 10 pW cm-2, which is obviously superior to the traditional silicon photodetectors. The AIE molecules develop a well energetic match to facilitate photocurrents, and the non-conjugated ionic impeding effect blocks electrons from transferring to the interface under dark conditions to lowered dark currents, which contributes much to the high detectivity. This work indicates that high performance organic devices could be achieved by jointly controlling the conjugation aggregation formation and the quantity and state of ions on the surface, providing a new appliation for AIEgens.

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Publication details

The article was received on 02 Sep 2017, accepted on 10 Oct 2017 and first published on 10 Oct 2017


Article type: Research Article
DOI: 10.1039/C7QM00404D
Citation: Mater. Chem. Front., 2017, Accepted Manuscript
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    The new application of AIEgens realized in photodetectors: reduced work function of transparent electrodes, and much improved performance

    L. Feng, C. Wang, X. Deng, X. Miao, J. Wang, Y. Wang and Z. Li, Mater. Chem. Front., 2017, Accepted Manuscript , DOI: 10.1039/C7QM00404D

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