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Narrowband light detection via internal quantum efficiency manipulation of organic photodiodes

Ardalan Armin Orcid Logo, Ross D. Jansen-van Vuuren, Nikos Kopidakis, Paul L. Burn, Paul Meredith Orcid Logo

Nature Communications, Volume: 6, Start page: 6343

Swansea University Authors: Ardalan Armin Orcid Logo, Paul Meredith Orcid Logo

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DOI (Published version): 10.1038/ncomms7343

Abstract

Spectrally selective, narrowband light detection is vital for full-color and Near Infrared (NIR) imaging, intelligent monitoring and machine vision. This is not possible using traditional broadband absorbing inorganic semiconductors without input filtering, nor narrowband absorbing organic semicondu...

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Published in: Nature Communications
ISSN: 2041-1723
Published: 2015
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa33783
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Abstract: Spectrally selective, narrowband light detection is vital for full-color and Near Infrared (NIR) imaging, intelligent monitoring and machine vision. This is not possible using traditional broadband absorbing inorganic semiconductors without input filtering, nor narrowband absorbing organic semiconductors particularly for the red and NIR. We demonstrate the first sub-100nm FWHM (Full-Width-at-Half-Maximum) visible-blind red and NIR photodetectors with state-of-the-art performance across critical response metrics. These devices are based upon organic photodiodes with optically thick junctions. Paradoxically, we use broadband absorbing organic semiconductors and utilize the electro-optical properties of the junction to create the narrowest band photoresponses yet demonstrated. In this context, these photodiodes outperfrom the encumbent technology (input filtered inorganic semiconductor diodes) and emerging technologies such as narrow absorber organic semiconductors or quantum nanocrystals. The design concept allows for response tuning and is generic for other spectral window. Furthermore, it is materials agnostic and applicable to disordered semiconductors such as perovskites.
Keywords: organic photodiodes, narrowband, charge collection narrowing
College: College of Science
Start Page: 6343